CN108597489A - A kind of bullet train car Active noise control system - Google Patents
A kind of bullet train car Active noise control system Download PDFInfo
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- CN108597489A CN108597489A CN201810362897.0A CN201810362897A CN108597489A CN 108597489 A CN108597489 A CN 108597489A CN 201810362897 A CN201810362897 A CN 201810362897A CN 108597489 A CN108597489 A CN 108597489A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17815—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the reference signals and the error signals, i.e. primary path
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17819—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the reference signals, e.g. to prevent howling
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17825—Error signals
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1283—Trains, trams or the like
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3046—Multiple acoustic inputs, multiple acoustic outputs
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The present invention relates to a kind of bullet train car Active noise control systems, including seat；Noise Acquisition device is arranged in the different noise excitation source positions that can cause noise reduction target area noise in compartment, the noise source signal for acquiring different location；Active sound-producing device, installation on the seat, are connect with active controller for sending out anti-noise source signal；Active controller, including reference noise extraction unit and control model generation unit, reference noise extraction unit is used to receive the noise source signal of multiple reference sensor acquisitions and extracts the noise source signal x (n) for PREDICTIVE CONTROL pattern, control model generation unit generates the anti-noise source signal y (n) opposite with noise source signal x (n) amplitude equal phases in real time for control model, control active sound-producing device to be analyzed noise source characteristic and automatically generated by Algorithm of Active Control.The present invention both can effectively reduce internal car noise, improve riding comfort, and small to the additional mass of original structure, meet vehicle lightweight requirements.
Description
Technical field
The invention belongs to bullet train noise reduction technology field, more particularly to a kind of bullet train car noise impedance system
System.
Background technology
With the fast development of rail traffic and being substantially improved for Vehicle Speed, noise decibel is with vehicle in train
The raising of speed is consequently increased, and directly influences the comfort level of passenger's seating.Presently known noise control technique includes mainly
Two class of passive noise control and active noise controlling, passive control technology mainly have control noise source strength, isolation propagation path
The methods of.Wherein, noise source control is most effective approach, but very for wheel-rail noise outside high-speed train and aerodynamic noise
Hardly possible reduces, and the noise-reducing design of bullet train, which can only use, at present improves oise insulation factor, increases sound-absorbing material, spraying deattenuation vibration
The measures such as acoustic radiation, but these measures can all increase complete vehicle weight, be disagreed with the thought of vehicle light-weight design.
Invention content
The present invention it is main it is dissatisfied certainly the technical issues of be to provide it is a kind of both can effectively reduce internal car noise, improve to take and relax
Appropriateness, but it is small to the additional mass of original structure, meet the bullet train car Active noise control system of vehicle lightweight requirements.
To achieve the above object, the technical scheme is that：
A kind of bullet train car Active noise control system, including：
Seat in compartment；
Noise Acquisition device is arranged in the different noise excitation sources position that can cause noise reduction target area noise in compartment
It sets, the noise source signal for acquiring different location；
Active sound-producing device, installation on the seat, are connect with active controller for sending out anti-noise source signal；
Active controller, including reference noise extraction unit and control model generation unit, the reference noise extraction are single
Member is connect with reference sensor, and the noise source signal for receiving multiple reference sensor acquisitions is simultaneously extracted for PREDICTIVE CONTROL mould
The noise source signal x (n) of formula, the control model generation unit are connect with reference noise extraction unit and active sound-producing device,
For control model to be analyzed noise source characteristic and automatically generated by Algorithm of Active Control, control active sound-producing device is real
Anti-noise source signal y (n) opposite with noise source signal x (n) amplitude equal phases Shi Shengcheng so that anti-noise source signal y (n) with make an uproar
Noise reduction is realized in sound-source signal x (n) superpositions.
Further, the active controller is Dspace controllers.
Further, the active sound-producing device is mounted on position at two human ears of seat head zone.
Further, the active sound-producing device is embedded two loudspeaker being mounted on inside seat head zone, two loudspeakers
Set up separately at two human ears.
Further, each loudspeaker are equipped with the sounding resonance box of thin-and-long, and the resonance box insertion is mounted on seat
It is internal.
Further, the noise excitation source position includes roof, side wall, car door and floor, the vehicle around the seat
It is separately installed with Noise Acquisition device in top region, side wall region, car door region and floor area.
Further, the Noise Acquisition device is reference sensor, and at least three is installed in the car roof area with reference to biography
Sensor, is mounted respectively to few 1 reference sensor in side wall region, car door region, and at least three ginseng is installed in floor area
Examine sensor.
Further, 3 reference sensors in car roof area are arranged in seat front, side and rear side
In the roof panels in portion, the dead astern, side and front side portion of seat are arranged in mounted on 3 reference sensors of floor area
Floor on, 1 reference sensor mounted on side wall region is arranged on the framed side wallboard above side window, be mounted on car door region
1 reference sensor be arranged on the end wall panel of the end door side immediately ahead of seat.
Further, the active controller further includes target area noise monitoring unit, the target area noise monitoring
For unit for monitoring noise signal of the noise reduction target area after noise reduction control in real time, the acquisition process of the noise signal is will to carry
It transmits in the path that the noise source signal x (n) taken and anti-noise source signal y (n) is multiplied by reference sensor to noise reduction target area respectively
Function H (n) and the path transfer function H1 (n) of active sound-producing device to noise reduction target area are superimposed acquisition afterwards.
Further, the path transfer function H (n) and active sound-producing device of the reference sensor to noise reduction target area are arrived
The obtaining step of the path transfer function H1 (n) of noise reduction target area includes；
When vehicle is debugged, multiple error pick-ups are installed in noise reduction target area, acquire active sounding dress in the quiescent state
The path transfer function of a plurality of transmission path of error pick-up is set, and is further obtained for calculating making an uproar after noise reduction control
Path transfer function H1 (n) needed for acoustical signal；Reference sensor is acquired under travel condition of vehicle to the more of error pick-up
The path transfer function of transmission path, and further obtain and passed for calculating the path needed for the noise signal after noise reduction control
The path transfer function H1 (n) of acquisition and path transfer function H (n) are stored in active controller by delivery function H (n).
In conclusion a kind of bullet train car Active noise control system provided by the invention, compared with prior art
Compared with having the following advantages that：
(1) present invention is superimposed cancellation principle according to noise impedance sound field, and active sounding is controlled by active controller
Device actively sends out the sound with original waveform superimposed cancellation in noise reduction target area, and then changes the sound field ring of target area
Border reduces the sound pressure levels of target area, achievees the purpose that control noise, improves the comfort level of passenger's seating.
(2) active sound-producing device is embedded into inside seat by the present invention, need not change original design of vehicle, only to seat
Chair is improved, and structure design is simple, and input cost is few, convenient for engineering application, and due to the additional mass to original structure
It is small, bullet train is met to light-weighted requirements at the higher level.
(3) noise behavior when present invention is run according to high speed railway car, Accurate Analysis cause head of passenger region to be made an uproar
The driving source of sound sets up reference sensor in the roof in compartment, side wall, car door and the different zones on floor separately, to obtain
Noise source signal in compartment in different zones enables reference channel to collect noise source information to greatest extent, and then is conducive to
Promote the accuracy of noise abatement.
(4) virtual error sensor technology is utilized in the present invention, noise reduction is monitored, and is only pacified when vehicle is debugged
Error pick-up is filled, and is not necessarily to installation error sensor when real vehicle is run, not only it is possible to prevente effectively from the head due to people passes through
Normal activity dawdles to error pick-up and error pick-up is made to damage, and is conducive to the accuracy for improving noise monitoring, meanwhile, also may be used
Keep armchair structure simpler, seat-weight is made to further decrease.
Description of the drawings
Fig. 1 is the control principle drawing of control system of the present invention；
Fig. 2 is the structure chart of seat in control system of the present invention.
As depicted in figs. 1 and 2, seat 1, backrest 2, seat cushion 3, leg lean on 4, handrail 5, loudspeaker 6, reference sensor 7, error pass
Sensor 8, active controller 9.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, a kind of bullet train car Active noise control system provided by the invention, including：Seat
1, Noise Acquisition device, error pick-up 8, active controller 9 and active sound-producing device.
Wherein, as shown in Fig. 2, seat 1 is the seat in compartment, in the present embodiment, to be in close proximity to drivers' cab
For commercial compartment, seat is made of backrest 2, seat cushion 3, leg by 4, handrail 5, pedestal, transmission mechanism and control unit, seat 1
Backrest 2, seat cushion 3, leg can be converted under the drive of transmission mechanism between sitting posture and prone position by 4.Seat 1 is in compartment mistake
Respectively one group of the setting of the both sides in road, every group includes one or two seat arranged side by side.Certain system can also be mounted on
In first block compartment, coach seat compartment or drivers' cab, one to 3 seats arranged side by side are included in every group.
One group of Noise Acquisition device is installed in compartment for every group of seat 1, Noise Acquisition device uses reference sensor
7, every group of Noise Acquisition device includes multiple reference sensors 7, and for obtaining respectively, different noises swash around seat in compartment
Encourage the noise source signal of source position.The Noise Acquisition device of difference group seat is provided separately, to improve the detection of noise source signal
The control accuracy of precision noise reduction.
For Adaptive Active Noise Control system, noise source signal is its main input parameter, noise source signal
Selection directly affect the noise reduction of noise impedance, therefore 7 arrangement of reference sensor seems quite important.
The noise source of bullet train is extremely complex, and especially commercial compartment is located at the head truck position of bullet train, noise source
More complicated, noise source mostlys come from wheel-rail noise, noise of equipment, pantograph noise, the aerodynamic noise etc. outside car body, for
Commercial compartment, also from the noise of equipment of drivers' cab.In the present embodiment, preferably multiple reference sensors 7 are directly arranged
It can directly acquire at the excitation source position for causing head of passenger region (i.e. noise reduction target area) noise, i.e., in roof area
One or more reference sensors 7 are installed respectively in domain, side wall region, car door region and floor area, cause to make an uproar to obtain
Noise source signal in the different zones of sound, by being arranged in the multiple with reference to passing of different noise excitation source positions in the present embodiment
Sensor 7 acquires multiple original noise source signals, can collect making an uproar in different zones to the maximum extent by multiple reference channels
Sound source information improves the acquisition precision of noise source signal.
The present embodiment configures eight reference sensors 7 according to a large amount of Experimental Comparison, preferred pin to every group of seat 1.Every group
In eight reference sensors 7 be separately mounted to car roof area, side wall region, car door region and floor area, eight with reference to passing
Sensor 7 surrounds seat arrangement.Wherein, 3 reference sensors 7 are installed in car roof area, are divided in side wall region, car door region
Not An Zhuan 1 reference sensor 7, in floor area install 3 reference sensors 7.3 references being arranged in car roof area
Sensor 7 is separately mounted to immediately ahead of seat 1, in the roof panels of 1 rear lateral portion of 1 side of seat and seat.Pacify in floor area
Dress 3 reference sensors 7, be separately positioned on 1 dead astern of seat, side, front side portion floor on, be mounted on side wall region in
1 reference sensor 7 be arranged on the framed side wallboard above the side window of 1 side of seat, be mounted on 1 of door region reference
Sensor 7 is arranged on the end wall panel of the end door side in 1 front of seat.
Active sound-producing device reaches active noise reduction target area also just using two loudspeaker 6 because being made a sound from loudspeaker
Be that the head zone of people needs the regular hour, if can be affected by the ambient apart from the distant sound sent out and understand
So that effect is deteriorated, in the present embodiment, for the noise reduction reached, the loudspeaker 6 of two sounding is respectively embedded into and are installed to seat
The inside of position at positive two human ear of 1 head zone of chair.Meanwhile because the noise in compartment based on low-frequency noise, to carry
High noise reduction, installs a resonance box with certain volume capacity at each loudspeaker 6, in the present embodiment, according to seat 1
Design feature, the sounding resonance box that a volume capacity is 1.5 liters of thin-and-long is devised, so that loudspeaker 6 send out low frequency
Sound, resonance box is embedded along longitudinal direction to be mounted on inside seat 1, is fixed by screws on chair framework, outer surface seat 1
Plain cotton fabric covers, and can't see loudspeaker 6 from the outside, does not influence the overall appearance effect of seat 1, and the original structure of seat is kept substantially
It is constant.It, can be the materials such as one layer of thin sponge be installed between plain cotton fabric and loudspeaker 6 again in order to preferably protect loudspeaker 6.
Active controller 9, is the core link in the active control system, and function mainly receives reference noise source letter
Number, carry out A/D and D/A conversion, by Algorithm of Active Control generation automatic control mode and control active sound-producing device sounding.It is main
Movement controller 9 is mounted on the chassis interior of 3 lower section of seat cushion.
In the present embodiment, active controller 9 preferably uses Dspace controllers, including reference noise extraction unit and control
Schema creation unit, reference noise extraction unit are connect with eight reference sensors 7, control model generation unit and eight references
Sensor 7 and two loudspeaker 6 connect, and form eight input channels and two output channels.Active controller 9 is for analyzing eight
Eight noise source signals in compartment different zones that reference sensor 7 acquires, and it is logical according to eight noise source signals of reception
It crosses sound source restructing algorithm and is reduced into the noise source signal x (n) that can be used for predicting noise control mode, then actively controlled by Dspace
Algorithm processed automatically generates control model, and controls two loudspeaker 6 simultaneously and generate the anti-noise opposite with noise source amplitude equal phase
Source signal y (n), so that anti-noise source signal y (n) is superimposed with noise source signal x (n) and then realizes noise reduction.
As shown in Figure 1, noise impedance (ANC) system flow is as follows：
The noise source signal for causing head zone noise is acquired by eight reference sensors 7, by eight noise source signals
It is input in active controller 9, active controller 9 is reduced into according to eight noise source signals of reception by sound source restructing algorithm
It can be used for predicting the noise source signal x (n) of noise control mode, recycle the Algorithm of Active Control in Dspace to sound source characteristic
It is analyzed, automatically generates control model, and send control signals to two loudspeaker 6, two loudspeaker 6 are in main noise reduction frequency
Place generates the anti-noise source y (n) opposite with noise source amplitude equal phase, by making main noise frequency amplitude decay after superposition,
And then change the sound field environment in head of passenger region, the noise of seat head zone is reduced, noise reduction is reached.
In the present embodiment, active controller 9 further includes target area noise monitoring unit, for monitoring noise reduction target in real time
Noise signal of the region after noise reduction control, and then monitor ANC system operating condition and the noise reduction effect of noise reduction target area in real time
Fruit.
The acquisition process of noise signal after noise reduction control is, by the noise source signal x (n) of extraction and anti-noise source signal
Y (n) is multiplied by reference sensor to the path transfer function H (n) and active sound-producing device to noise reduction mesh of noise reduction target area respectively
The path transfer function H1 (n) in mark region is superimposed acquisition afterwards, i.e., is calculated by formula x (n) * H (n)+y (n) * H1 (n)
Data are the approximate signal at 8 position of error pick-up.Use virtual sensor techniques that can replace true inspection in this way
Measured data, conducive to the accuracy of noise monitoring data is effectively ensured.
Wherein, path transfer function H (n) and active sound-producing device to noise reduction of the reference sensor 7 to noise reduction target area
The obtaining step of the path transfer function H1 (n) of target area includes：
When vehicle is debugged, multiple error pick-ups 8 are installed in noise reduction target area, i.e., 1 head zone of seat just
One error pick-up 8 is installed respectively at two human ear of face.
In the case where vehicle is in static state, acquisition active sound-producing device to the road of a plurality of transmission path of error pick-up 8
Diameter transmission function, active sound-producing device include two loudspeaker 6, and error pick-up 8 is also configured as two, so active sound-producing device
To 4 transmission paths are formed between error pick-up 8, active controller 9 analyzes the path transfer function of 4 transmission paths
Afterwards, the active sound-producing device needed for the noise signal after calculating noise reduction control is obtained to pass to the path between error pick-up 8
Delivery function H1 (n).
Under travel condition of vehicle, the path of a plurality of transmission path of acquisition reference sensor 7 to error pick-up 8 is transmitted
Function, reference sensor 7 include eight, and error pick-up 8 is set as two, so eight reference sensors, 7 to two errors
16 transmission paths are formed between sensor 8, after active controller 9 analyzes the path transfer function of 16 transmission paths, i.e.,
It obtains and is passed for calculating the reference sensor 7 needed for the noise signal after noise reduction control to the path between error pick-up 8
Delivery function H1 (n).
The path transfer function H1 (n) of acquisition and path transfer function H (n) are stored in active controller 9, in vehicle
In actual moving process, the path transfer function H1 (n) of acquisition and path transfer function H (n) are directly applied into formula x (n) *
The approximate signal at 8 position of error pick-up is obtained in H (n)+y (n) * H1 (n).
After acquisition approach transfer function H 1 (n) and H (n), error pick-up 8 is removed, on seat 1 not when real vehicle is run
Installation error sensor 8.
In the present embodiment, using virtual error sensor technology, noise reduction is monitored, is only pacified when vehicle is debugged
Fill error pick-up 8, and when real vehicle run without installation error sensor 8, not only it is possible to prevente effectively from due to people head
Frequent activity dawdles to error pick-up 8 and error pick-up 8 is made to damage, and is conducive to the accuracy for improving noise monitoring, meanwhile,
Also 1 structure of seat can be made simpler, so that 1 weight of seat is further decreased, meet vehicle lightweight requirements.
When detecting, error pick-up 8 is embedded in the inside of seat 1, is wrapped up using glass silk flosssilk wadding, is covered with plain cotton fabric,
Error pick-up 8 maintains an equal level with peripheral part, its protrusion of surface is avoided to cause the change dramatically of noise.
Noise impedance technology is applied in the seat design of bullet train by the present invention, according to noise impedance sound
Field superposition cancellation principle, changes the sound field environment of seat head zone, reduces the sound pressure levels at human ear, realize to seat head
The active noise reduction in portion region, it is especially more preferable to Middle and low frequency noise control effect, achieve the purpose that control noise, improves passenger's
Seat comfort degree.
Active noise reduction system is embedded into inside seat by the present invention, and the loudspeaker of active sounding are embedded in seat head zone,
Active control system actively sends out the sound with original waveform superimposed cancellation by the loudspeaker of head zone, reaches control noise
Purpose need not change original design of vehicle, be only improved to seat, and structure design is simple, and input cost is few, be convenient for work
Journey application.The invention is small to the additional mass of original structure, meets the principle of light-weight design.
As described above, the plan content in conjunction with given by attached drawing, can derive similar technical solution.In every case it is not de-
Content from technical solution of the present invention, according to the technical essence of the invention to made by above example it is any it is simple modification, etc.
With variation and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of bullet train car Active noise control system, which is characterized in that including：
Seat in compartment；
Noise Acquisition device is arranged in the different noise excitation source positions that can cause noise reduction target area noise in compartment, uses
In the noise source signal of acquisition different location；
Active sound-producing device, installation on the seat, are connect with active controller for sending out anti-noise source signal；
Active controller, including reference noise extraction unit and control model generation unit, the reference noise extraction unit with
Reference sensor connects, and the noise source signal for receiving multiple reference sensor acquisitions is simultaneously extracted for PREDICTIVE CONTROL pattern
Noise source signal x (n), the control model generation unit connect with reference noise extraction unit and active sound-producing device, are used for
Control model is analyzed noise source characteristic and automatically generated by Algorithm of Active Control, and control active sound-producing device is given birth in real time
At the anti-noise source signal y (n) opposite with noise source signal x (n) amplitude equal phases, so that anti-noise source signal y (n) and noise source
Noise reduction is realized in signal x (n) superpositions.
2. a kind of bullet train car Active noise control system according to claim 1, it is characterised in that：The active
Controller is Dspace controllers.
3. a kind of bullet train car Active noise control system according to claim 1, it is characterised in that：The active
Sound-producing device is mounted on position at two human ears of seat head zone.
4. a kind of bullet train car Active noise control system according to claim 3, it is characterised in that：The active
Sound-producing device is embedded two loudspeaker being mounted on inside seat head zone, and two loudspeaker set up separately at two human ears.
5. a kind of bullet train car Active noise control system according to claim 4, it is characterised in that：It is each described
Loudspeaker are equipped with the sounding resonance box of thin-and-long, and the resonance box insertion is mounted on inside seat.
6. a kind of bullet train car Active noise control system according to claim 1, it is characterised in that：The noise
It includes roof, side wall, car door and floor, car roof area, side wall region around the seat, car door region to encourage source position
And Noise Acquisition device is separately installed in floor area.
7. a kind of bullet train car Active noise control system according to claim 6, it is characterised in that：The noise
Harvester is reference sensor, at least three reference sensor is installed in the car roof area, in side wall region, car door area
It is mounted respectively to few 1 reference sensor in domain, at least three reference sensor is installed in floor area.
8. a kind of bullet train car Active noise control system according to claim 7, it is characterised in that：Mounted on vehicle
3 reference sensors in the region of top are arranged in the roof panels of seat front, side and rear lateral portion, are mounted on floor
3 reference sensors in region are arranged on the floor of the dead astern of seat, side and front side portion, are mounted on side wall region
1 reference sensor be arranged on the framed side wallboard above side window, the 1 reference sensor setting for being mounted on car door region is in place
On the end wall panel of end door side immediately ahead of seat.
9. according to a kind of bullet train car Active noise control system of claim 1 to 8 any one of them, feature exists
In：The active controller further includes target area noise monitoring unit, and the target area noise monitoring unit is for real-time
Noise signal of the noise reduction target area after noise reduction control is monitored, the acquisition process of the noise signal is the noise source letter that will be extracted
Number x (n) and anti-noise source signal y (n) is multiplied by reference sensor to the path transfer function H (n) of noise reduction target area and leads respectively
The path transfer function H1 (n) of dynamic sound-producing device to noise reduction target area is superimposed acquisition afterwards.
10. a kind of bullet train car Active noise control system according to claim 9, it is characterised in that：The ginseng
Sensor is examined to pass to the path transfer function H (n) of noise reduction target area and the path of active sound-producing device to noise reduction target area
The obtaining step of delivery function H1 (n) includes；
When vehicle is debugged, multiple error pick-ups are installed in noise reduction target area, acquires active sound-producing device in the quiescent state and arrives
The path transfer function of a plurality of transmission path of error pick-up, and further obtain for calculating the letter of the noise after noise reduction control
Path transfer function H1 (n) needed for number；A plurality of biography of the acquisition reference sensor to error pick-up under travel condition of vehicle
The path transfer function in path is passed, and further obtains and transmits letter for calculating the path needed for the noise signal after noise reduction control
The path transfer function H1 (n) of acquisition and path transfer function H (n) are stored in active controller by number H (n).
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| CN201810362897.0A CN108597489A (en) | 2018-04-21 | 2018-04-21 | A kind of bullet train car Active noise control system |
| PCT/CN2019/077302 WO2019201028A1 (en) | 2018-04-21 | 2019-03-07 | Active noise control system in high speed train |
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|---|---|---|---|
| CN201810362897.0A CN108597489A (en) | 2018-04-21 | 2018-04-21 | A kind of bullet train car Active noise control system |
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| CN108597489A true CN108597489A (en) | 2018-09-28 |
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| CN201810362897.0A Pending CN108597489A (en) | 2018-04-21 | 2018-04-21 | A kind of bullet train car Active noise control system |
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| CN110401902A (en) * | 2019-08-02 | 2019-11-01 | 天津大学 | An active noise reduction system and method |
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