CN115219249B - Vehicle steering system aging detection method, device and vehicle - Google Patents
Vehicle steering system aging detection method, device and vehicle Download PDFInfo
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- CN115219249B CN115219249B CN202210143486.9A CN202210143486A CN115219249B CN 115219249 B CN115219249 B CN 115219249B CN 202210143486 A CN202210143486 A CN 202210143486A CN 115219249 B CN115219249 B CN 115219249B
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- 239000011159 matrix material Substances 0.000 claims description 21
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/06—Steering behaviour; Rolling behaviour
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Abstract
The invention discloses a vehicle steering system aging detection method, equipment and a vehicle, wherein the vehicle steering system aging detection method comprises the steps of obtaining a steering torque value, a steering angle and an aging duty ratio curve of a vehicle steering system; and updating the aging ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the updated aging ratio curve. The invention realizes that the aging detection result of the vehicle steering system can be automatically detected accurately and rapidly in real time based on the measured aging value and the aging duty ratio curve, and the objectivity, the accuracy and the reliability of the aging detection of the vehicle steering system are greatly improved.
Description
Technical Field
The present invention relates to vehicle detection technologies, and in particular, to a method and an apparatus for detecting aging of a steering system of a vehicle, and a vehicle.
Background
At present, more and more vehicles are equipped with a vehicle steering system (EPS for short), the vehicle steering system can enable a driver to lightly steer a steering wheel of the vehicle, and timely and accurately control the running direction of the vehicle, so that the driver can master the running state of the vehicle, therefore, the vehicle steering system plays a very important role in the running safety of the vehicle, the aging detection of the vehicle steering system is very necessary, but the existing aging detection is obtained by measuring the mileage of the vehicle, and in fact, the vehicle steering system controlled by transverse steering is not essentially related to the mileage of longitudinal running, so that the aging detection of the vehicle steering system is inaccurate and has low reliability.
Disclosure of Invention
The invention provides a vehicle steering system aging detection method and device and a vehicle, and solves the technical problems of inaccurate aging detection and low reliability of the existing vehicle steering system.
A vehicle steering system aging detection method, comprising:
Acquiring a steering torque value, a steering angle and an aging duty ratio curve of a vehicle steering system;
Determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle;
And updating the aging duty ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the aging duty ratio curve after updating.
A vehicle steering system aging detection apparatus comprising:
the acquisition module is used for acquiring a steering torque value, a steering angle and an aging duty ratio curve of the vehicle steering system;
The determining module is used for determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle;
And the detection module is used for updating the aging duty ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the aging duty ratio curve after updating.
A vehicle comprises a vehicle steering system and a control module connected with the vehicle steering system, wherein the control module executes the aging detection method of the vehicle steering system.
The invention provides a vehicle steering system aging detection method, which is realized by acquiring a steering torque value, a steering angle and an aging duty ratio curve of a vehicle steering system; the invention can acquire the steering torque value and the steering angle in real time, calculate the measured aging value corresponding to the steering angle according to the aging duty ratio curve, the steering torque value and the steering angle, dynamically update the aging duty ratio curve based on the measured aging value and the steering angle, and output the aging detection result of the vehicle steering system in real time through the aging duty ratio curve based on the measured aging value and the aging duty ratio curve, thereby realizing that the aging detection result of the aging condition of the vehicle steering system can be automatically detected in real time, accurately and quickly, greatly improving the objectivity, accuracy and reliability of the aging detection of the vehicle steering system and ensuring the driving safety of the vehicle steering system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for detecting vehicle steering system degradation in accordance with one embodiment of the present invention;
FIG. 2 is a flowchart of step S20 in a method for detecting aging of a steering system of a vehicle according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a vehicle steering system aging detection apparatus according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The aging detection method for the vehicle steering system provided by the invention can be applied to a control module in a vehicle, and the aging detection method for the vehicle steering system is realized through the control module.
In one embodiment, as shown in fig. 1, a method for detecting aging of a steering system of a vehicle is provided, which mainly includes the following steps S10-S30:
S10, obtaining a steering torque value, a steering angle and an aging duty ratio curve of a vehicle steering system.
The vehicle steering system is a system for controlling the movement of a vehicle to run or reverse, and the like, and is abbreviated as EPS, the vehicle steering system can calculate and output a steering torque value by collecting parameters such as the speed of the vehicle at the current moment, the hand force of the rotation of the steering wheel, the steering angle of the steering wheel, the rotating speed of the steering, and the like, the steering torque value is the torque for measuring the load or the resistance born by the vehicle at the current moment, the steering torque value comprises an auxiliary torque of a motor and an auxiliary hand torque of a mechanical aid, the load or the resistance born by the vehicle can be reflected through the auxiliary torque and the hand torque, the steering angle is the rotating angle of the steering wheel of the vehicle, namely the rotating angle of the steering wheel of the vehicle, the steering angle can be collected through an angle sensor of the vehicle steering system to measure the rotating angle of the steering wheel, the zero-degree steering angle of the steering wheel of the vehicle can be used as a reference, the clockwise rotation angle exceeding zero degree is defined as a positive value, the anticlockwise rotation angle exceeding zero degree is defined as a negative value, the steering wheel of the general vehicle can rotate clockwise by 900 degrees by taking zero degree as a reference, namely can rotate clockwise by two halves by taking zero degree as a reference, can rotate anticlockwise by 900 degrees by taking zero degree as a reference, namely can rotate anticlockwise by two halves by taking zero degree as a reference, the maximum angle of the clockwise rotation and the maximum angle of the anticlockwise rotation are the same, are symmetrical, the aging ratio curve is a continuous curve represented by the aging ratio corresponding to each steering angle in the range of all steering angles, namely is obtained by using the acquired discrete aging ratio corresponding to each steering angle, the initial aging ratio curve is a line segment with zero value in the range of all steering angles, because the steering wheel which is delivered or initialized does not rotate and has no aging loss process, the aging ratio value of each steering angle is zero, when the steering wheel rotates from the delivery or initialized position, the vehicle steering system starts to consume, the aging ratio curve can change along with the arrival times of the rotating steering angle, generally, the more the steering angle is rotated, the larger the aging ratio value is, and the aging ratio curve can present a normally distributed curve along with the time, because the arrival frequency appearing in the middle is highest.
S20, determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle.
It is to be understood that the aging ratio corresponding to the steering angle may be found from the aging ratio curve, then an aging coefficient corresponding to the found aging ratio may be obtained from a preset aging coefficient comparison table, finally the measured aging value corresponding to the steering angle may be determined according to the aging coefficient, the steering torque value and the steering angle, the aging coefficient may be a variable or coefficient for measuring the aging of the steering system of the vehicle, the aging coefficient may be derived from historical experimental data, the aging coefficient obtained through experiments, the steering torque value and the functional relationship between the steering angle and the measurement standard of the aging degree may be calculated, and the measured aging value may be an aging value determined by the aging coefficient, the measured steering torque value and the steering angle.
The aging coefficient comparison table is a table of one-to-one correspondence between the aging ratio and the aging coefficient, the aging coefficients represent different aging coefficients corresponding to different aging ratio, the aging ratio and the aging coefficient can be in linear or parabolic relationship, when the aging ratio is zero, the aging coefficient is 1, and when the aging ratio is 100%, the aging coefficient is 0.
In an embodiment, in the step S20, the determining the measured aging value according to the aging duty ratio curve, the steering torque value, and the steering angle includes:
S201, determining an aging duty ratio to be processed according to the aging duty ratio curve and the steering angle.
It is understood that the ageing ratio corresponding to the steering angle is found in the ageing ratio curve, that is, the found ageing ratio is determined as the ageing ratio to be treated, and the ageing ratio to be treated is the ageing ratio to be treated or changed.
S202, determining an aging coefficient corresponding to the aging ratio to be processed according to a preset aging coefficient comparison table.
The aging coefficient comparison table is a comparison table obtained through experiments in advance, and the aging coefficient corresponding to the aging ratio to be processed is searched from the aging coefficient comparison table.
S203, determining the measured aging value according to the aging coefficient, the steering torque value and the steering angle.
Understandably, the measured aging value corresponding to the steering angle is calculated by using a preset aging function through the searched aging coefficient, the collected steering torque value and the steering angle, and the preset aging function can embody the relationship between the aging coefficient, the steering torque value and the steering angle and the damage degree of aging.
The invention realizes that the aging coefficient corresponding to the aging ratio to be processed is determined according to the aging ratio curve and the steering angle, the aging coefficient corresponding to the aging ratio to be processed is determined according to the preset aging coefficient comparison table, and the measured aging value is determined according to the aging coefficient, the steering torque value and the steering angle, so that the aging coefficient corresponding to the current steering angle is obtained from the aging ratio curve through searching the aging ratio in the aging ratio curve, the aging value is automatically determined based on the aging coefficient, the steering torque value and the steering angle, the aging degree of the vehicle steering system under the current steering angle at the moment is accurately measured, and the degree of damage or equipment aging at one time under one steering angle is scientifically and objectively measured.
In an embodiment, said determining said measured aging value from said aging coefficient, said steering torque value, and said steering angle comprises:
The measured aging value is obtained according to the aging coefficient, the steering torque value, the steering angle and a preset aging function, wherein the preset aging function is as follows:
y=T×θ×k,
Wherein,
Y is a measured ageing value;
t is a steering torque value;
θ is the steering angle;
k is the aging coefficient.
Therefore, the degree of damage or equipment aging caused by one time of reaching under one steering angle can be accurately measured through the preset aging function.
And S30, updating the aging duty ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the aging duty ratio curve after updating.
It is understood that, a graph of steering angle-aging value of a relationship between steering angle and aging value is pre-constructed, the graph of steering angle-aging value records a distribution graph of aging value of effective discrete points represented by each steering angle reached once, that is, the graph of steering angle-aging value records historical effective aging values of discrete values, the discrete aging values calculated under the same steering angle are not greatly different, that is, the discrete aging values are within a certain tolerance range, the aging values in the whole life cycle or aging period have fluctuation, but the amplitude of the fluctuation does not exceed a certain tolerance range, the tolerance range has dynamic change with the change of time and steering angle, therefore, it is required to filter or judge whether the measured aging value is effective discrete points, to reject the aging value determined to be effective in the graph of steering angle-aging value, and to insert the measured aging value which is effective after filtering into the graph of steering angle-aging value, the updating process is: accumulating all ageing values under each steering angle in the steering angle-ageing value coordinate graph, and continuously connecting the accumulated results to obtain a new ageing curve, namely drawing or generating a continuous curve according to discrete points, namely generating a curve function on a series of steering angle-accumulated ageing value array matrixes to generate a curve function capable of reflecting the distribution condition of the steering angle-accumulated ageing value array matrixes, wherein the accumulated ageing value is a value for accumulating all ageing values under one steering angle, and then according to the new aging curve and the preset life curve, obtaining the aging ratio of each steering angle, and updating the original aging ratio curve to obtain a new aging ratio curve, wherein the updating process can also be a process of adding the effective measured aging value into the original generated aging curve, namely adding the measured aging value and the accumulated aging value corresponding to the steering angle in the generated aging curve to obtain a new accumulated aging value corresponding to the steering angle, thus generating a new aging curve, and then according to the new aging curve and the preset life curve, updating the original aging ratio curve, so that the accumulated processing of the aging values of other steering angles or the unchanged operation of other steering angles can be carried out, and the processing operation of a processor is reduced.
And analyzing all ageing ratio values in the new ageing ratio curve, and determining the ageing detection result, wherein the ageing detection result is a result of an ageing state of the vehicle steering system based on the ageing ratio curve, and the ageing detection result reflects the ageing state or condition of the current vehicle steering system and plays a role in early warning.
The invention realizes that the aging detection result of the vehicle steering system is determined according to the aging ratio curve, the steering torque value and the steering angle, and the aging detection result of the vehicle steering system is updated based on the aging ratio curve, the aging detection result of the vehicle steering system is updated according to the aging ratio curve after updating, therefore, the steering torque value and the steering angle can be acquired in real time, the aging detection result corresponding to the steering angle is calculated in real time according to the aging ratio curve, the steering torque value and the steering angle, the aging detection result of the vehicle steering system is output in real time according to the aging ratio curve, the aging detection result of the vehicle steering system is dynamically updated based on the aging ratio curve, and the aging detection result of the vehicle steering system can be accurately, quickly and automatically detected in real time based on the aging detection result of the aging condition of the vehicle steering system, and the driving safety of the vehicle steering system is ensured.
In an embodiment, in the step S30, that is, the updating the aging duty cycle curve based on the measured aging value and the steering angle includes:
And judging whether the measured aging value falls into a historical aging matrix interval corresponding to the steering angle.
The method comprises the steps of determining whether the measured aging value is a valid discrete point through the historical aging matrix section, determining that the measured aging value falls into the historical aging matrix section if the measured aging value does not fall into the preset tolerance value range of the mean value, determining that the measured aging value does not fall into the historical aging matrix section if the measured aging value does not fall into the preset tolerance value range of the mean value, or performing mean and variance calculation on the historical aging matrix section, setting the preset tolerance value range on the basis of variance, determining that the measured aging value is within the preset tolerance value range of the mean value, summarizing whether the measured aging value is a valid tolerance value through a historical experiment, determining that the measured aging value falls into the tolerance value range of the mean value if the measured aging value does not fall into the preset tolerance value range of the mean value, and eliminating or eliminating the measured aging value to the error aging matrix, and filtering the measured aging value to avoid the influence of the vehicle aging system.
In an embodiment, the determining whether the measured aging value falls before the historical aging matrix interval corresponding to the steering angle includes:
and acquiring a preset angle interval corresponding to the steering angle.
It is understood that, preset angle intervals corresponding to the steering angles are preset for each steering angle, the preset angle intervals are tolerance ranges of the steering angles, the preset angle intervals can be set according to requirements, for example, the steering angle is +20 degrees, the preset angle intervals are tolerance ranges of 3 degrees, namely +17 (+ 20-3) degrees to +23 (+ 20+3) degrees, the preset angle intervals can be set to be the same as other steering angles due to the fact that the frequency of occurrence of larger steering angles is less, or the preset angle intervals can be set to be different, for example, the steering angle is-380 degrees, and the preset angle intervals are tolerance ranges of 10 degrees, namely-390 (-380-10) degrees to-370 (-380+10) degrees.
And generating the historical aging matrix interval according to the preset angle interval and the aging duty ratio curve.
It is understood that a coordinate graph of the steering angle-aging value corresponding to the aging ratio curve is obtained, an aging curve may be generated from the coordinate graph of the steering angle-aging value, and an aging ratio curve may be generated based on the aging curve, so that one aging ratio curve corresponds to one coordinate graph of the steering angle-aging value, and all aging values within the preset angle interval range are extracted from the coordinate graph of the steering angle-aging value corresponding to the aging ratio curve, thereby generating the historical aging matrix interval corresponding to the steering angle or the matrix window corresponding to the steering angle.
The invention realizes that a preset angle interval is generated through an angle adjacent to the steering angle, and a historical aging matrix interval is automatically generated based on the preset angle interval, and the measured aging value is effectively judged through the historical aging matrix interval, so that the situation that the aging value in the range of the adjacent preset angle interval is too large or too small is avoided, the situation that the excessively large or too small is misadopted belongs to an invalid aging value is avoided, and therefore, whether the measured aging value is effective or not can be automatically judged, the accuracy and the reliability of the aging value are improved, and the influence of the misadopted output aging value on the output aging detection result is avoided.
And when the measured aging value falls into the historical aging matrix interval, updating the aging duty ratio curve according to the measured aging value.
Understandably, if the measured aging value falls into the historical aging matrix interval, adding the measured aging value to an aging curve corresponding to the aging duty ratio curve, thereby updating the aging curve, and then obtaining a quotient of the updated aging curve and a preset life curve, and updating the current aging duty ratio curve by using the quotient obtained result.
In an embodiment, said updating said aging duty cycle curve according to said measured aging value comprises:
And increasing the measured aging value to an aging curve corresponding to the aging duty cycle curve.
It can be understood that, in the graph of the steering angle-aging value corresponding to the aging ratio curve, the measured aging value is increased to the steering angle corresponding to the measured aging value, all the aging values corresponding to the same steering angle are accumulated to obtain an accumulated aging value of the steering angle, the accumulated aging values of all the steering angles are continuously connected to obtain an aging curve, and discrete points can be converted into a continuous curve for filtering, summing weighting, interpolation mean square and other processes in the continuous connection process, so as to obtain an increased aging curve, and the aging curve is stored.
And updating the aging ratio curve according to the aging curve after the measured aging value is increased and a preset life curve.
Understandably, the life curve is a curve of all steering angles drawn by the life values corresponding to the steering angles obtained according to experimental data statistics, the quotient of the accumulated aging value in the aging curve after the increase under the same steering angle and the life value in the life curve is obtained, the aging ratio of the steering angle is obtained, all the aging ratio values are summarized and connected, so that the original aging ratio curve is updated, a new aging ratio curve is obtained, the aging ratio curve is stored, the aging ratio curve is called or obtained when the subsequent new steering angle is triggered, and the aging ratio curve is updated in time so as to facilitate the subsequent output of the aging detection result.
Wherein the lifetime value represents the extent of lifetime exhibited by the structure in the steering system at one steering angle.
The invention realizes that the aging ratio curve is updated according to the aging curve and the preset life curve after the measured aging value is added, so that the effective measured aging value can be automatically added into the aging curve, and the aging ratio curve is automatically updated and obtained based on the aging curve and the preset life curve.
And deleting the measured aging value when the measured aging value does not fall into the historical aging matrix interval.
Understandably, if the measured aging value does not fall into the historical aging matrix interval, the measured aging value is removed, and the original aging duty cycle curve, namely the aging duty cycle curve, is kept unchanged.
In an embodiment, in the step S30, the determining, according to the updated aging duty cycle curve, an aging detection result of the vehicle steering system includes:
and acquiring a preset early warning threshold value and the maximum aging ratio value in the updated aging ratio curve.
Understandably, the preset early warning threshold is a threshold for setting early warning or reminding, and the preset early warning threshold can be set according to requirements, for example, the preset early warning threshold can be an early warning or reminding value, or can be a plurality of early warning or reminding values, and the maximum aging ratio is the maximum value in the aging ratio corresponding to all steering angles in the aging ratio curve.
And determining the aging detection result according to the preset early warning threshold value and the maximum aging occupancy value.
It may be appreciated that, when the maximum aging ratio is greater than or equal to the preset early warning threshold, the maximum aging ratio and early warning information corresponding to the preset early warning threshold are used as the aging detection result, when the maximum aging ratio is smaller than the preset early warning threshold, the maximum aging ratio is used as the aging detection result, in an embodiment, the preset early warning threshold includes a plurality of preset sub-thresholds, different preset sub-thresholds correspond to different early warning information, the early warning information has high, medium and low priority, when the maximum aging ratio is greater than or equal to the preset sub-threshold, the maximum aging ratio and all the early warning information corresponding to the early warning information greater than or equal to the preset sub-threshold are used as the aging detection result, and when the maximum aging ratio is smaller than all the preset sub-thresholds, the maximum aging ratio is used as the aging detection result, so that the aging detection result reflects the aging state or condition of the current vehicle steering system and the early warning effect.
The method and the device realize that the aging detection result is determined according to the preset early warning threshold value and the maximum aging ratio value by acquiring the preset early warning threshold value and the updated maximum aging ratio value in the aging ratio curve, so that the aging detection result of the aging condition of the vehicle steering system can be automatically output by combining the preset early warning threshold value and the maximum aging ratio value, the effect of timely early warning is achieved, the driving safety of the vehicle steering system is ensured, and the accuracy and the reliability of the output of the aging detection result of the vehicle steering system are improved.
In one embodiment, a vehicle steering system aging detection apparatus is provided, which corresponds to the vehicle steering system aging detection method in the above embodiment one by one. As shown in fig. 3, the vehicle steering system aging detection apparatus includes an acquisition module 11, a determination module 12, and a detection module 13. The functional modules are described in detail as follows:
the acquisition module 11 is used for acquiring a steering torque value, a steering angle and an aging duty ratio curve of a vehicle steering system;
a determining module 12, configured to determine a measured aging value according to the aging duty cycle curve, the steering torque value, and the steering angle;
and the detection module 13 is used for updating the aging duty ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the aging duty ratio curve after updating.
The specific limitation regarding the vehicle steering system aging detection apparatus may be referred to the limitation regarding the vehicle steering system aging detection method hereinabove, and will not be described in detail herein. The various modules in the vehicle steering system degradation detection apparatus described above may be implemented in whole or in part by software, associated hardware in the vehicle, and combinations thereof.
The invention provides a vehicle, which comprises a vehicle steering system and a control module connected with the vehicle steering system, wherein the control module executes the aging detection method of the vehicle steering system, the control module is a module for controlling all processors integrated in the vehicle, and the vehicle steering system is a system for controlling the vehicle to move in a driving or reversing mode.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (8)
1. A vehicle steering system aging detection method, characterized by comprising:
acquiring a steering torque value, a steering angle and an aging ratio curve of a vehicle steering system, wherein the aging ratio curve is a curve showing normal distribution;
Determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle;
Updating the aging duty ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the aging duty ratio curve after updating;
And determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle, including:
determining an aging duty ratio value to be processed according to the aging duty ratio curve and the steering angle;
determining an aging coefficient corresponding to the aging occupancy rate to be processed according to a preset aging coefficient comparison table;
determining the measured aging value according to the aging coefficient, the steering torque value and the steering angle;
The determining the measured aging value according to the aging coefficient, the steering torque value, and the steering angle includes:
the measured aging value is obtained according to the aging coefficient, the steering torque value, the steering angle and a preset aging function, wherein the preset aging function is used for measuring the degree of aging of the instrument caused by the fact that the instrument arrives once under one steering angle.
2. The vehicle steering system aging detection method according to claim 1, wherein the preset aging function is:
Wherein,
To measure the ageing value;
Is a steering torque value;
is the steering angle;
Is the aging coefficient.
3. The vehicle steering system aging detection method according to claim 1, wherein the updating the aging duty cycle curve based on the measured aging value and the steering angle includes:
judging whether the measured aging value falls into a historical aging matrix interval corresponding to the steering angle;
when the measured aging value falls into the historical aging matrix interval, updating the aging duty ratio curve according to the measured aging value;
and deleting the measured aging value when the measured aging value does not fall into the historical aging matrix interval.
4. The vehicle steering system aging detection method according to claim 3, wherein said determining whether the measured aging value falls before a historical aging matrix interval corresponding to the steering angle includes:
Acquiring a preset angle interval corresponding to the steering angle;
and generating the historical aging matrix interval according to the preset angle interval and the aging duty ratio curve.
5. The vehicle steering system aging detection method according to claim 3, wherein said updating said aging duty cycle curve based on said measured aging value includes:
adding the measured aging value to an aging curve corresponding to the aging duty cycle curve;
and updating the aging ratio curve according to the aging curve after the measured aging value is increased and a preset life curve.
6. The vehicle steering system aging detection method according to claim 5, wherein said determining the aging detection result of the vehicle steering system from the aging duty cycle curve after the update process includes:
acquiring a preset early warning threshold value and a maximum aging ratio value in the updated aging ratio curve;
and determining the aging detection result according to the preset early warning threshold value and the maximum aging occupancy value.
7. A vehicle steering system degradation detection apparatus, characterized by comprising:
The system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a steering torque value, a steering angle and an aging ratio curve of a vehicle steering system, wherein the aging ratio curve is a curve showing normal distribution;
The determining module is used for determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle;
The detection module is used for updating the aging duty ratio curve based on the measured aging value and the steering angle, and determining an aging detection result of the vehicle steering system according to the aging duty ratio curve after updating;
And determining a measured aging value according to the aging duty ratio curve, the steering torque value and the steering angle, including:
determining an aging duty ratio value to be processed according to the aging duty ratio curve and the steering angle;
determining an aging coefficient corresponding to the aging occupancy rate to be processed according to a preset aging coefficient comparison table;
determining the measured aging value according to the aging coefficient, the steering torque value and the steering angle;
The determining the measured aging value according to the aging coefficient, the steering torque value, and the steering angle includes:
the measured aging value is obtained according to the aging coefficient, the steering torque value, the steering angle and a preset aging function, wherein the preset aging function is used for measuring the degree of aging of the instrument caused by the fact that the instrument arrives once under one steering angle.
8. A vehicle comprising a vehicle steering system and a control module coupled to the vehicle steering system, the control module performing the vehicle steering system degradation detection method of any one of claims 1 to 6.
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| CN106163903A (en) * | 2014-04-10 | 2016-11-23 | 捷太格特欧洲公司 | The estimation that power steering system is aging |
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| CN101017117A (en) * | 2007-02-28 | 2007-08-15 | 清华大学 | Durability testing stand of electric power-assisted steering system |
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| CN106163903A (en) * | 2014-04-10 | 2016-11-23 | 捷太格特欧洲公司 | The estimation that power steering system is aging |
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