CN102494076B - Magneto-rheological damper capable of performing self speed monitoring - Google Patents
Magneto-rheological damper capable of performing self speed monitoring Download PDFInfo
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- CN102494076B CN102494076B CN 201110390502 CN201110390502A CN102494076B CN 102494076 B CN102494076 B CN 102494076B CN 201110390502 CN201110390502 CN 201110390502 CN 201110390502 A CN201110390502 A CN 201110390502A CN 102494076 B CN102494076 B CN 102494076B
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Abstract
一种能自监测速度的磁流变阻尼器，涉及减震控制技术，为了解决目前缺少具有自补偿功能的、磁流变控制中具有速度自传感功能的磁流变阻尼器的问题，本发明在现有磁流变阻尼器的尾部缸体内增加了用于实现测量自身速度的组件：导磁钢部件、二个一号永磁体、二个二号永磁体、一号感知磁路的永磁体、一号感知磁路的导磁钢部件、二号感知磁路的导磁钢部件、二号感知磁路的永磁体和感知线圈，随着内活塞杆的运动，固定在活塞杆端部的一号感知磁路的永磁体随之运动，受到磁场激励的线圈匝数将随着内活塞杆的左右移动而成正比地减小或增加，从而感知线圈的磁链的变化将正比于活塞的位移，根据线圈中的感知电压的变化即获得活塞的速度。用于减震控制技术。
A magneto-rheological damper capable of self-monitoring speed, related to shock-absorbing control technology, in order to solve the current problem of lack of magneto-rheological damper with self-compensation function and speed self-sensing function in magnetorheological control, this paper The invention adds components used to measure its own speed in the tail cylinder of the existing magneto-rheological damper: magnetically permeable steel parts, two No. 1 permanent magnets, two No. 2 permanent magnets, and No. 1 sensing magnetic circuit. The permanent magnet, the magnetic steel part of the No. 1 sensing magnetic circuit, the magnetic steel part of the No. 2 sensing magnetic circuit, the permanent magnet and the sensing coil of the No. 2 sensing magnetic circuit are fixed on the end of the piston rod as the inner piston rod moves. The permanent magnet of the No. 1 sensing magnetic circuit at the top moves accordingly, and the number of turns of the coil excited by the magnetic field will decrease or increase in proportion to the left and right movement of the inner piston rod, so that the change of the flux linkage of the sensing coil will be proportional to The displacement of the piston, the speed of the piston is obtained according to the change of the sensed voltage in the coil. Used in shock control technology.
Description
Technical field
The present invention relates to the damping control technique.
Background technique
MR damper is that a kind of rheological effect of magnetic flow liquid under magnetic fields of utilizing realizes the novel damping device that damping force is regulated, and has advantages of that damping force is rapid, continuous, suitable contrary adjustable, but the intellectuality control of implementation structure vibration.
Traditional MR damper half ACTIVE CONTROL needs extra dynamic response sensor to realize closed-loop feedback control.And the introducing of additional sensors will make installing space, the raising system cost that system is more complicated, needs are larger and reduce system reliability.
Summary of the invention
The objective of the invention is to realize closed-loop feedback control in order to solve the existing extra dynamic response sensor of MR damper half ACTIVE CONTROL needs, and the introducing of additional sensors will make system more complicated, need larger installing space, improve system cost and reduce the problem of system reliability, provide a kind of can be from the MR damper of monitoring velocity.
a kind of can be from the MR damper of monitoring velocity, it comprises the outer piston bar, piston core, inner piston rod, left end cap, right end cap, cylinder body, drive coil, a plastic encapsulant and No. two plastic encapsulant, cylinder body is cylindrical body, right end cap is fixed on the right-hand member of cylinder body, left end cap is fixed on the left end of cylinder body, the center of left end cap has through hole, the center of a plastic encapsulant has through hole, No. one plastic encapsulant is positioned at cylinder body, and the equal close contact of inwall of this plastic encapsulant and left end cap and cylinder body, the center of No. two plastic encapsulant has through hole, No. two plastic encapsulant is positioned at cylinder body, and the inwall close contact with cylinder body, described No. two plastic encapsulant are divided into two zones with cylinder interior, be respectively active chamber and afterbody chamber, the outer piston bar is the identical cylindrical body of diameter with inner piston rod, piston core is cylindrical body, the outer piston bar, piston core, inner piston rod is all coaxial with cylinder body, piston core is positioned at active chamber, one end of outer piston bar passes the through hole at left end cap and the number of plastic encapsulant center and is connected with an end of piston core, drive coil is looped around on piston core, one end of inner piston rod passes the through hole of No. two plastic encapsulant and is connected with the other end of piston core, describedly can also comprise from the MR damper of monitoring velocity No. zero magnetic conduction steel part, two permanent magnets, two No. two permanent magnets, the permanent magnet of a perception magnetic circuit, the magnetic conduction steel part of a perception magnetic circuit, the magnetic conduction steel part of No. two perception magnetic circuits, the permanent magnet of No. two perception magnetic circuits and perception coil, described No. zero magnetic conduction steel part, two permanent magnets, two No. two permanent magnets, the permanent magnet of a perception magnetic circuit, the magnetic conduction steel part of a perception magnetic circuit, the magnetic conduction steel part of No. two perception magnetic circuits, the permanent magnet of No. two perception magnetic circuits and perception coil all are positioned at the afterbody chamber of cylinder body, No. zero magnetic conduction steel part is cirque body, No. zero magnetic conduction steel part medial axis overlaps with the medial axis of cylinder body, an end face of described No. zero magnetic conduction steel part is fixed on the right side of No. two plastic encapsulant, a permanent magnet is cirque body, two permanent magnets are side by side between the inwall of No. zero magnetic conduction steel part and cylinder body, and described two permanent magnets are fixedly connected with cylinder body with No. zero magnetic conduction steel part respectively, No. two permanent magnets are cirque body, two No. two permanent magnets are side by side between the inwall and inner piston rod of No. zero magnetic conduction steel part, and described two No. two permanent magnets are fixedly connected with the inwall of No. zero magnetic conduction steel part, gapped between described two No. two permanent magnets and inner piston rod, the magnetic conduction steel part of No. two perception magnetic circuits is cirque body, the magnetic conduction steel part of No. two perception magnetic circuits is socketed in the end of inner piston rod, the magnetic conduction steel part of a perception magnetic circuit is cirque body, the magnetic conduction steel part of a perception magnetic circuit is fixed on the inwall of cylinder body, the stroke of inner piston rod is less than the distance between the magnetic conduction steel part of the magnetic conduction steel part of a perception magnetic circuit and No. two perception magnetic circuits, the permanent magnet of No. two perception magnetic circuits is cirque body, the permanent magnet of No. two perception magnetic circuits is fixed on the internal surface of magnetic conduction steel part of a perception magnetic circuit, gapped between the permanent magnet of No. two perception magnetic circuits and inner piston rod, the permanent magnet of a perception magnetic circuit is cirque body, the permanent magnet of a perception magnetic circuit is socketed on the outer surface of magnetic conduction steel part of No. two perception magnetic circuits, gapped between the permanent magnet of a perception magnetic circuit and perception coil, the perception coil is on the inwall of the cylinder body between the magnetic conduction steel part of ring and the magnetic conduction steel part that is fixed on a perception magnetic circuit and No. two perception magnetic circuits.
The present invention is integrated in MR damper tail chamber section with the function of velocity transducer on the basis of conventional MR damper shown in Figure 2, realized the self-sensing function of damper speed in magnetorheological control, and had self-compensating function.Solve traditional control system because sensed system is mounted externally, produced the problem of collision, infiltration, oil impregnate; Use described MR damper and can make that the control system structure is relatively simple, installing space is little, cost is low, reliability is high.
Description of drawings
Fig. 1 is the structural representation of MR damper of the present invention, and Fig. 2 is the structural representation of conventional MR damper, Fig. 3 be the present invention under the constant velocity of piston of difference, the graph of relation of sense voltage and displacement.
Embodiment
embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment is described a kind ofly can comprise from the MR damper of monitoring velocity outer piston bar 1, piston core 2, inner piston rod 3, left end cap 4, right end cap 5, cylinder body 6, drive coil 7, a plastic encapsulant 8-1 and No. two plastic encapsulant 8-2, cylinder body 6 is cylindrical body, right end cap 5 is fixed on the right-hand member of cylinder body 6, left end cap 4 is fixed on the left end of cylinder body 6, the center of left end cap 4 has through hole, the center of a plastic encapsulant 8-1 has through hole, No. one plastic encapsulant 8-1 is positioned at cylinder body 6, and the equal close contact of inwall of this plastic encapsulant 8-1 and left end cap 4 and cylinder body 6, the center of No. two plastic encapsulant 8-2 has through hole, No. two plastic encapsulant 8-2 is positioned at cylinder body 6, and the inwall close contact with cylinder body 6, described No. two plastic encapsulant 8-2 are divided into two zones with cylinder body 6 inside, be respectively active chamber and afterbody chamber, outer piston bar 1 is the identical cylindrical body of diameter with inner piston rod 3, piston core 2 is cylindrical body, outer piston bar 1, piston core 2, inner piston rod 3 is all coaxial with cylinder body 6, piston core 2 is positioned at active chamber, one end of outer piston bar 1 passes the through hole at left end cap 4 and the number of plastic encapsulant 8-1 center and is connected with an end of piston core 2, drive coil 7 is looped around on piston core 2, one end of inner piston rod 3 passes the through hole of No. two plastic encapsulant 8-2 and is connected with the other end of piston core 2, describedly can also comprise from the MR damper of monitoring velocity No. zero magnetic conduction steel part 9, two permanent magnets 10, two No. two permanent magnets 11, the permanent magnet 12 of a perception magnetic circuit, the magnetic conduction steel part 13-1 of a perception magnetic circuit, the magnetic conduction steel part 13-2 of No. two perception magnetic circuits, the permanent magnet 14 of No. two perception magnetic circuits and perception coil 15, described No. zero magnetic conduction steel part 9, two permanent magnets 10, two No. two permanent magnets 11, the permanent magnet 12 of a perception magnetic circuit, the magnetic conduction steel part 13-1 of a perception magnetic circuit, the magnetic conduction steel part 13-2 of No. two perception magnetic circuits, the permanent magnet 14 of No. two perception magnetic circuits and perception coil 15 all are positioned at the afterbody chamber of cylinder body 6, No. zero magnetic conduction steel part 9 is cirque body, No. zero magnetic conduction steel part 9 medial axis overlap with the medial axis of cylinder body 6, an end face of described No. zero magnetic conduction steel part 9 is fixed on the right side of No. two plastic encapsulant 8-2, No. one permanent magnet 10 is cirque body, two permanent magnets 10 are side by side between the inwall of No. zero magnetic conduction steel part 9 and cylinder body 6, and described two permanent magnets 10 are fixedly connected with cylinder body 6 with No. zero magnetic conduction steel part 9 respectively, No. two permanent magnet 11 is cirque body, two No. two permanent magnets 11 are side by side between the inwall and inner piston rod 3 of No. zero magnetic conduction steel part 9, and described two No. two permanent magnets 11 are fixedly connected with the inwall of No. zero magnetic conduction steel part 9, gapped between described two No. two permanent magnets 11 and inner piston rod 3, the magnetic conduction steel part 13-2 of No. two perception magnetic circuits is cirque body, the magnetic conduction steel part 13-2 of No. two perception magnetic circuits is socketed in the end of inner piston rod 3, the magnetic conduction steel part 13-1 of a perception magnetic circuit is cirque body, the magnetic conduction steel part 13-1 of a perception magnetic circuit is fixed on the inwall of cylinder body 6, the stroke of inner piston rod (3) is less than the distance between the magnetic conduction steel part 13-2 of the magnetic conduction steel part 13-1 of a perception magnetic circuit and No. two perception magnetic circuits, the permanent magnet 14 of No. two perception magnetic circuits is cirque body, the permanent magnet 14 of No. two perception magnetic circuits is fixed on the internal surface of magnetic conduction steel part 13-1 of a perception magnetic circuit, gapped between the permanent magnet 14 of No. two perception magnetic circuits and inner piston rod 3, the permanent magnet 12 of a perception magnetic circuit is cirque body, the permanent magnet 12 of a perception magnetic circuit is socketed on the outer surface of magnetic conduction steel part 13-2 of No. two perception magnetic circuits, gapped between the permanent magnet 12 of a perception magnetic circuit and perception coil 15, perception coil 15 for ring and be fixed on the magnetic conduction steel part 13-1 of a perception magnetic circuit and the magnetic conduction steel part 13-2 of No. two perception magnetic circuits between the inwall of cylinder body 6 on.
The present invention's No. zero magnetic conduction steel part 9 forms respectively two blocking-up magnetic circuits with a permanent magnet 10 and No. two permanent magnets 11 respectively in cylinder body 6 and inner piston rod 3, to guarantee the constancy of magnetic flux in the perception magnetic circuit.Because the gap of piston and cylinder body is very little, if directly in damper afterbody cylinder body, perception device is set, the magnetic flux in the perception magnetic circuit will be difficult to assurance, and perceived accuracy can reduce greatly.To be very unrealistic and cut off cylinder body, though the built-in piston rod of cut-out is feasible, the complexity of transformation increases greatly, and the overall integrity of damper also easily is damaged.For this reason, adopt the method for magnetic circuit blocking-up here, magnetic circuit closed in damper afterbody cylinder body perception, thus guaranteed the constant of magnetic flux in the perception magnetic circuit, then guarantee the precision of perception.
The perception magnetic circuit is comprised of the magnetic conduction steel part 13-2 of the magnetic conduction steel part 13-1 of the permanent magnet 12 of cylinder body 6, a perception magnetic circuit, a perception magnetic circuit, No. two perception magnetic circuits and the permanent magnet 14 of No. two perception magnetic circuits.
Side-to-side movement along with inner piston rod 3, the permanent magnet 12 that is fixed on a perception magnetic circuit of piston rod end moves thereupon, magnetic flux in perception coil 15 is constant, but the turn number N that is subject to magnetic field excitation will proportionally reduce or increase along with moving left and right of inner piston rod 3, thereby the variation of the magnetic linkage of perception coil 15 (N Ф) will be proportional to the displacement of piston, so the sense voltage in coil (variance ratio of magnetic linkage) is with the speed of direct ratio piston.
Fig. 3 has provided under different velocity of piston, the sense voltage in the perception coil and the relation of displacement, and the sense voltage that can obtain coil is proportional to velocity of piston, and sense voltage is not subjected to Influence of Displacement.
Embodiment two: present embodiment is described in conjunction with Fig. 1, what present embodiment was different from mode of execution one is that it also comprises compensating winding 16, described compensating winding 16 is ring, and compensating winding 16 is fixed on the magnetic conduction steel part 13-1 right side of a perception magnetic circuit.Other composition and annexation are identical with mode of execution one.
Along with piston rod draws outward, the leakage field of perception magnetic circuit inside can affect sensing accuracy, for this reason, damper inside in the present invention has increased compensating winding 16, in order to monitor the variation of leakage field, the voltage of compensating winding is proportional to coil turn and Magnetic leakage flux product, and offset voltage is:
Wherein, N is coil turn, and V is coil voltage;
Add that above offset voltage is final sense voltage on the voltage basis of perception coil 15.
In addition, if installing space is limited, compensating winding can be set, but should guarantee that the perception magnetic circuit has the necessarily inner space of (greater than 5mm).
Claims (2)
1. an energy is from the MR damper of monitoring velocity, it comprises outer piston bar (1), piston core (2), inner piston rod (3), left end cap (4), right end cap (5), cylinder body (6), drive coil (7), a plastic encapsulant (8-1) and No. two plastic encapsulant (8-2), cylinder body (6) is cylindrical body, right end cap (5) is fixed on the right-hand member of cylinder body (6), left end cap (4) is fixed on the left end of cylinder body (6), the center of left end cap (4) has through hole, the center of a plastic encapsulant (8-1) has through hole, a plastic encapsulant (8-1) is positioned at cylinder body (6), and the equal close contact of inwall of this plastic encapsulant (8-1) and left end cap (4) and cylinder body (6), the center of No. two plastic encapsulant (8-2) has through hole, No. two plastic encapsulant (8-2) are positioned at cylinder body (6), and the inwall close contact with cylinder body (6), described No. two plastic encapsulant (8-2) are divided into two zones with cylinder body (6) inside, be respectively active chamber and afterbody chamber, outer piston bar (1) is the identical cylindrical body of diameter with inner piston rod (3), piston core (2) is cylindrical body, outer piston bar (1), piston core (2), inner piston rod (3) is all coaxial with cylinder body (6), piston core (2) is positioned at active chamber, one end of outer piston bar (1) passes the through hole at left end cap (4) and the number of a plastic encapsulant (8-1) center and is connected with an end of piston core (2), drive coil (7) is looped around on piston core (2), one end of inner piston rod (3) passes the through hole of No. two plastic encapsulant (8-2) and is connected with the other end of piston core (2), it is characterized in that describedly also comprising from the MR damper of monitoring velocity No. zero magnetic conduction steel part (9), two permanent magnets (10), two No. two permanent magnets (11), the permanent magnet of a perception magnetic circuit (12), the magnetic conduction steel part (13-1) of a perception magnetic circuit, the magnetic conduction steel part (13-2) of No. two perception magnetic circuits, the permanent magnet of No. two perception magnetic circuits (14) and perception coil (15), described No. zero magnetic conduction steel part (9), two permanent magnets (10), two No. two permanent magnets (11), the permanent magnet of a perception magnetic circuit (12), the magnetic conduction steel part (13-1) of a perception magnetic circuit, the magnetic conduction steel part (13-2) of No. two perception magnetic circuits, the permanent magnet of No. two perception magnetic circuits (14) and perception coil (15) all are positioned at the afterbody chamber of cylinder body (6), No. zero magnetic conduction steel part (9) is cirque body, No. zero magnetic conduction steel part (9) medial axis overlaps with the medial axis of cylinder body (6), an end face of described No. zero magnetic conduction steel part (9) is fixed on the right side of No. two plastic encapsulant (8-2), a permanent magnet (10) is cirque body, two permanent magnets (10) are positioned between the inwall of No. zero magnetic conduction steel part (9) and cylinder body (6) side by side, and described two permanent magnets (10) are fixedly connected with cylinder body (6) with No. zero magnetic conduction steel part (9) respectively, No. two permanent magnets (11) are cirque body, two No. two permanent magnets (11) are positioned between the inwall and inner piston rod (3) of No. zero magnetic conduction steel part (9) side by side, and described two No. two permanent magnets (11) are fixedly connected with the inwall of No. zero magnetic conduction steel part (9), gapped between described two No. two permanent magnets (11) and inner piston rod (3), the magnetic conduction steel part (13-2) of No. two perception magnetic circuits is cirque body, the magnetic conduction steel part (13-2) of No. two perception magnetic circuits is socketed in the end of inner piston rod (3), the magnetic conduction steel part (13-1) of a perception magnetic circuit is cirque body, the magnetic conduction steel part (13-1) of a perception magnetic circuit is fixed on the inwall of cylinder body (6), the stroke of inner piston rod (3) is less than the distance between the magnetic conduction steel part (13-2) of the magnetic conduction steel part (13-1) of a perception magnetic circuit and No. two perception magnetic circuits, the permanent magnet of No. two perception magnetic circuits (14) is cirque body, the permanent magnet of No. two perception magnetic circuits (14) is fixed on the internal surface of magnetic conduction steel part (13-1) of a perception magnetic circuit, gapped between the permanent magnet of No. two perception magnetic circuits (14) and inner piston rod (3), the permanent magnet of a perception magnetic circuit (12) is cirque body, the permanent magnet of a perception magnetic circuit (12) is socketed on the outer surface of magnetic conduction steel part (13-2) of No. two perception magnetic circuits, gapped between the permanent magnet of a perception magnetic circuit (12) and perception coil (15), perception coil (15) for ring and be fixed on the magnetic conduction steel part (13-1) of a perception magnetic circuit and the magnetic conduction steel part (13-2) of No. two perception magnetic circuits between the inwall of cylinder body (6) on.
2. a kind of according to claim 1 can be from the MR damper of monitoring velocity, it is characterized in that it also comprises compensating winding (16), described compensating winding (16) is ring, and compensating winding (16) is fixed on magnetic conduction steel part (13-1) right side of a perception magnetic circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110390502 CN102494076B (en) | 2011-11-30 | 2011-11-30 | Magneto-rheological damper capable of performing self speed monitoring |
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| CN 201110390502 CN102494076B (en) | 2011-11-30 | 2011-11-30 | Magneto-rheological damper capable of performing self speed monitoring |
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| CN102494076B true CN102494076B (en) | 2013-06-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319699A (en) * | 2008-07-11 | 2008-12-10 | 重庆大学 | Magneto-rheological fluid shock absorber with annular external magnetic field generator |
| EP2055985A1 (en) * | 2007-10-30 | 2009-05-06 | HONDA MOTOR CO., Ltd. | Magneto-rheological damper |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3818697A (en) * | 1996-07-30 | 1998-02-20 | Board Of Regents Of The University And Community College System Of Nevada, The | Magneto-rheological fluid damper |
| US6419057B1 (en) * | 2001-01-12 | 2002-07-16 | Delphi Technologies, Inc. | Power-off damping in MR damper |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2055985A1 (en) * | 2007-10-30 | 2009-05-06 | HONDA MOTOR CO., Ltd. | Magneto-rheological damper |
| CN101319699A (en) * | 2008-07-11 | 2008-12-10 | 重庆大学 | Magneto-rheological fluid shock absorber with annular external magnetic field generator |
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