CN110701236A - Semi-active control engine mount of magnetorheological elastomer and control method thereof - Google Patents
Semi-active control engine mount of magnetorheological elastomer and control method thereof Download PDFInfo
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- CN110701236A CN110701236A CN201911009882.7A CN201911009882A CN110701236A CN 110701236 A CN110701236 A CN 110701236A CN 201911009882 A CN201911009882 A CN 201911009882A CN 110701236 A CN110701236 A CN 110701236A
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- 239000000806 elastomer Substances 0.000 title claims abstract description 66
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- 210000004379 membrane Anatomy 0.000 claims abstract description 10
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- 210000002469 basement membrane Anatomy 0.000 claims abstract description 3
- 238000004073 vulcanization Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 description 25
- 238000013016 damping Methods 0.000 description 15
- 239000012530 fluid Substances 0.000 description 14
- 238000013461 design Methods 0.000 description 8
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- 229920000459 Nitrile rubber Polymers 0.000 description 1
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- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
Abstract
The invention discloses a semi-active control engine mount of a magnetorheological elastomer, which comprises: a suspension housing having a top opening; the inertia channel plate is annular and is arranged in the suspension shell, and the outer edge part of the inertia channel plate is fixedly connected with the suspension shell; a decoupling membrane fixedly disposed at a center of the inertia path plate; the outer edge part of the rubber basement membrane is fixedly connected between the bottom of the inertia channel plate and the inner wall of the shell along the circumferential direction; the rubber main spring is fixedly connected to the opening at the top and forms a closed cavity with the suspension shell and the rubber bottom film in an enclosing manner; the cavity is divided into a first cavity and a second cavity by the inertia channel plate and the decoupling film; the connecting rod is coaxially and fixedly connected with the rubber main spring, and one end of the connecting rod extends into the first cavity; the first annular permanent magnet is arranged in the first cavity and is coaxially and fixedly connected to the connecting rod; and a second annular permanent magnet disposed in the second chamber and fixedly connected to the inertia track plate.
Description
Technical Field
The invention belongs to the technical field of automobile suspension vibration reduction, and particularly relates to a semi-active control engine suspension of a magnetorheological elastomer and a control method thereof.
Background
With the development of the automobile industry, higher requirements are put forward on the NVH performance of automobiles, and the vibration noise of the automobile power assembly is one of the main sources of the NVH problem of the automobiles, so that the design of the vibration damping and noise reduction device aiming at the vibration characteristic of the automobile power assembly has great engineering significance.
Automotive powertrain mounts come in many categories, and since the advent of rubber mounts in the last 20 years of the world, new products have evolved, such as hydraulic mounts, active and semi-active control mounts based on magnetorheological fluid designs, and active and semi-active control mounts based on electrorheological fluid designs. However, the active control hydraulic mount usually requires external energy supply and has a complicated structure, and although the vibration isolation performance is optimal, the active control hydraulic mount does not have the condition of being applied to a real vehicle in a large scale. The semi-active control suspension and the hydraulic suspension are simple in structure and have good stability, so that the semi-active control suspension and the hydraulic suspension become a hotspot of research.
The mechanical property of the novel intelligent magnetorheological material can be changed according to the change of an external magnetic field, and the novel intelligent magnetorheological material has the characteristics of high response speed, good reversibility and the like. Magnetorheological fluid is one of magnetorheological materials, but the magnetorheological fluid vibration damper has the problems of particle precipitation, difficult liquid sealing and the like. Most of the existing magnetorheological suspensions require a large amount of magnetorheological fluid and are difficult to seal, and the precipitation phenomenon is aggravated by using the magnetorheological fluid in a large amount, so that the application range of the magnetorheological fluid is greatly limited. The magnetorheological elastomer material overcomes the defects of easy sedimentation, poor stability, easy abrasion of particles and the like of magnetorheological liquid, and has the advantages of high response speed, good reversibility, simple structural design, low preparation cost and the like.
Disclosure of Invention
The invention designs and develops a semi-active control engine suspension of a magnetorheological elastomer, wherein a magnetorheological elastomer decoupling film is arranged between two magnetorheological fluid chambers which can be communicated, the magnetic field intensity around the magnetorheological elastomer decoupling film can be changed along with the displacement of a connecting rod in the vertical direction, and one purpose of the semi-active control engine suspension is to enable the engine suspension to change the rigidity in a self-adaptive manner when being impacted by the outside.
The invention designs and develops a semi-active control engine suspension of a magnetorheological elastomer, wherein an inertia channel plate is provided with an electromagnetic coil, and the aim is to further adjust the magnetic field strength in the suspension by changing the current passing through the electromagnetic coil, so that the adjustment range of the magnetic field strength is expanded, and the rigidity of the suspension is changed.
The invention designs and develops a control method for semi-actively controlling an engine mount by a magnetorheological elastomer, and aims to adaptively increase the rigidity of the engine mount by controlling the current direction and the current intensity of an electromagnetic coil when the vehicle speed is higher so as to improve the vibration isolation performance of the engine mount.
The invention designs and develops a control method for semi-actively controlling an engine mount by a magnetorheological elastomer, and aims to adaptively reduce the rigidity of the engine mount by controlling the current direction and the current intensity of an electromagnetic coil when the vehicle speed is low, so that the engine mount has better vibration isolation performance.
The technical scheme provided by the invention is as follows:
a semi-active control engine mount of magnetorheological elastomer, comprising:
a suspension housing having a top opening;
the inertia channel plate is annular and is arranged in the suspension shell, and the raised parts of the inertia channel plate, the outer edges of which are upward and downward, are fixedly connected with the suspension shell;
a decoupling film provided at the center of the inertia path plate, and an outer edge portion of the decoupling film is fixed embedded in the inertia path plate;
the outer edge part of the rubber basement membrane is fixedly connected between the bottom of the inertia channel plate and the inner wall of the shell along the circumferential direction;
the rubber main spring is fixedly connected to the top opening and forms a closed cavity with the suspension shell and the rubber bottom membrane in an enclosing manner;
wherein the inertial channel plate and the decoupling membrane separate the cavity into a first chamber and a second chamber;
the connecting rod is coaxially and fixedly connected with the rubber main spring in a vulcanization mode, and one end of the connecting rod extends into the first cavity;
the first annular permanent magnet is arranged in the first cavity and is coaxially and fixedly connected to the connecting rod;
a second annular permanent magnet disposed in the second chamber and fixedly connected to the inertia track plate;
the first annular permanent magnet and the second annular permanent magnet are coaxially arranged.
Preferably, an annular accommodating cavity is coaxially formed in the inertia channel plate, and an electromagnetic coil is arranged in the annular accommodating cavity.
Preferably, the semi-active control engine mount of the magnetorheological elastomer further comprises:
the two magneto-rheological elastic rings are respectively embedded in the inner wall of the shell and are coaxially arranged with the inertia channel plate; the two magneto-rheological elastic rings are respectively positioned on two sides of the inertia channel plate.
Preferably, a sealing ring is arranged between the bottom surface of the inertia channel plate and the magnetorheological elastic ring.
Preferably, the bottom of the suspension housing is provided with a plurality of vent holes.
Preferably, the semi-active control engine mount of the magnetorheological elastomer further comprises:
a spoiler disposed within the first chamber and coaxially fixedly mounted on the connecting rod, wherein the spoiler is disposed on top of the first annular permanent magnet.
Preferably, the spoiler includes:
a base body portion having a disk shape and a central through hole; and
the turbulent flow part is fixedly connected to the outer edge of the base body part along the circumferential direction of the base body part, and an included angle is formed between the turbulent flow part and the base body part;
wherein the spoiler is disposed toward a bottom plate of the base portion; the base body portion is connected to the link rod through the center through hole.
Preferably, the inertia channel plate is internally provided with an annular inertia channel, and the inertia channel wall is a non-smooth surface.
A control method for semi-actively controlling an engine mount by using a magnetorheological elastomer comprises the following steps:
when in use
When the magnet is powered on, the current direction of the magnet coil is controlled to enable the direction of the magnetic field generated by the magnet coil to be the same as that of the magnetic field generated by the annular permanent magnet; and controlling the current intensity through the electromagnetic coil as follows:
wherein, IaIs a first reference current intensity; f. ofeIs the vibration frequency of the engine; f. ofxIs the suspension vibration frequency; v is the vehicle running speed, V0A reference value of the running speed of the vehicle; m is the weight of the whole vehicle, m0Is the reference value of the weight of the whole vehicle.
Preferably, the method for controlling the semi-active control engine mount by using the magnetorheological elastomer further comprises the following steps:
when in use
When the magnet is powered on, the current direction of the magnet coil is controlled to enable the direction of the magnetic field generated by the magnet coil to be opposite to that of the magnetic field generated by the annular permanent magnet; and controlling the current intensity passing through the electromagnetic coil as follows:
wherein, IbIs a second reference current intensity; f. ofeIs the vibration of the engineA dynamic frequency; f. ofxIs the suspension vibration frequency; v is the vehicle running speed, V0A reference value of the running speed of the vehicle; m is the weight of the whole vehicle, m0Is the reference value of the weight of the whole vehicle.
The invention has the beneficial effects that:
(1) according to the semi-active control engine mount of the magnetorheological elastomer, the magnetorheological elastomer decoupling film is arranged between the two magnetorheological fluid chambers which can be communicated, the magnetic field intensity around the magnetorheological elastomer decoupling film can be changed along with the displacement of the connecting rod in the vertical direction, and the rigidity of the engine mount can be changed in a self-adaptive manner when the engine mount is impacted by the outside; the problem that the rigidity of the suspension cannot be changed or the structure of an adjusting device is complex in the common engine suspension is solved.
(2) The semi-active control engine suspension of the magnetorheological elastomer is provided with the electromagnetic coil, and the magnetic field generated by the electromagnetic coil and the permanent magnetic field generated by the permanent magnet are superposed, so that the magnetic field intensity in the suspension can be enhanced or reduced by adjusting the current intensity, the rigidity of the suspension can cover any interval from lower rigidity to higher rigidity, the dynamic control on the rigidity of the suspension is realized, and the vibration isolation effect of the engine suspension is further improved.
(3) According to the semi-active control engine suspension with the magnetorheological elastomers, the annular magnetorheological elastomers are respectively arranged inside the upper and lower shells of the suspension, and when the magnetic field intensity of the annular magnetorheological elastomers is changed, the shearing damping force between the annular magnetorheological elastomers and the suspension shell is changed, so that the vibration impact energy from a power assembly can be reduced, and the vibration attenuation effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a semi-active control engine mount of a magnetorheological elastomer according to the present invention.
Fig. 2 is a schematic structural diagram of the suspension upper shell according to the present invention.
Fig. 3 is a structural schematic diagram of a suspension lower shell according to the invention.
Fig. 4 is a schematic structural view of the lower plate of the inertia track according to the present invention.
Fig. 5 is a schematic diagram of the operation of the present invention for adjusting the total magnetic field by changing the current in the electromagnetic coil.
Fig. 6 is a schematic diagram of the operation of the present invention for adjusting the total magnetic field by changing the current in the electromagnetic coil.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in figures 1-4, the invention provides a semi-active control engine mount of a magnetorheological elastomer, which mainly comprises a mount shell part, an inertia channel plate part and an excitation device part.
The suspension housing mainly includes a connection rod 110, a main rubber spring 120, a suspension upper housing 130, a suspension lower housing 140, and a rubber bottom membrane 150. Wherein the middle disk portion 111 of the connecting rod 110 is embedded in the rubber main spring 120 by vulcanization. The rubber main spring 120 is vulcanized and connected with the suspension upper housing 130, and the suspension upper housing 130 is connected with the suspension lower housing 140 through a peripheral flange. Wherein, the main rubber spring 120 mainly bears the load and impact from the power assembly; the material of the rubber main spring 120 can be vulcanized nitrile rubber or styrene butadiene rubber. The suspended upper housing 130 and the suspended lower housing 140 are suspended sealing elements. The upper frame of the suspension upper housing 130, i.e., the upper opening, is connected to the rubber main spring 120 by vulcanization and adhesive bonding, and the lower portion is connected to the inertial channel plate 200 by riveting, thereby ensuring the sealing of the internal liquid.
In the suspension, a circular cavity 131 is formed in the wall of the suspension upper shell 130 along the circumferential direction, and an annular opening 131a communicated with the cavity in the upper shell is formed in the inner side of the circular cavity 131; correspondingly, a circular cavity 141 is formed in the wall of the suspension lower housing 140 along the circumferential direction, and an annular opening 141a communicating with the cavity inside the lower housing is formed inside the circular cavity 141.
The inertia channel plate portion is mainly composed of an inertia channel plate 200, a magnetorheological elastomer decoupling film 210, a first annular magnetorheological elastomer 220 and a second annular magnetorheological elastomer 230. The inertial passage plate 200 is formed in a ring plate shape and is fixedly disposed between the suspension upper housing 130 and the suspension lower housing 140. The magnetorheological elastomer decoupling film 210 is arranged in a central circular hole of the inertia channel plate 200, and the outer edge part of the magnetorheological elastomer decoupling film 210 is embedded and fixed in the inertia channel plate 200. A suspension upper liquid chamber 201 is formed between the inertia path plate 200 and the rubber main spring 120, and a suspension lower liquid chamber 202 is formed between the inertia path plate 200 and the rubber bottom film 150. The suspension upper liquid chamber 201 and the suspension lower liquid chamber 202 are filled with a liquid, which is an ethylene glycol aqueous solution in this embodiment. Meanwhile, an annular inertia channel 203 is coaxially arranged in the inertia channel plate 200, and the liquid in the suspension upper liquid chamber 201 flows into the suspension lower liquid chamber 202 through a through hole 203a arranged on the inertia channel 203. The outer edge of the inertia path plate 200 has connection portions 204 and 205 that protrude upward and downward, respectively, and is embedded in the circular ring-shaped cavity 131 and the circular ring-shaped cavity 141 by the connection portions 204 and 205, respectively. A first gap is reserved between the top of the connecting part 204 and the top of the annular cavity 131, and a first annular magnetorheological elastomer 220 is installed in the first gap; a second gap is reserved between the bottom of the connecting part 205 and the bottom of the annular cavity 141, and a second annular magnetorheological elastomer 230 is installed in the second gap.
The peripheral circumference of the rubber bottom membrane 150 is snapped into the annular opening 141a, coaxial positioning pin holes are formed in the bottom of the inertial channel plate 200 and the suspension lower housing 140, and the positioning pins 150a are disposed in the positioning pin holes to fix the rubber bottom membrane 150 and prevent the rubber bottom membrane 150 from being separated from the suspension lower housing 140 due to insufficient pressing force. Meanwhile, an annular sealing ring 240 is arranged between the inertia channel plate 200 and the second annular magnetorheological elastomer 230. When the suspension system is excited by the outside, the liquid in the suspension can be prevented from leaking through the gap between the inertia channel plate 200 and the second annular magnetorheological elastomer 230, and good air tightness in the suspension is ensured. The rubber bottom membrane 150 serves as a carrier for magnetorheological fluid inside the suspension lower fluid chamber 202, provides a pressure difference for the oscillating motion of the fluid between the upper fluid chamber and the lower fluid chamber, and ensures that the hydraulic suspension generates sufficient damping. A plurality of air vents 142 are formed in the suspension lower housing 140 to balance the atmospheric pressure inside and outside the suspension.
The inertia track plate 200 is coaxially opened with a ring-shaped coil slot 207 inside, and in this embodiment, the coil slot 207 is opened in the peripheral region of the inertia track 203.
As shown in fig. 1 and 4, in the present embodiment, the inertia track plate 200 is mainly composed of an inertia track upper plate 200a and an inertia track lower plate 200b which are symmetrically arranged. A half T-shaped groove is dug in the middle ring of the inertia channel upper plate 200a and the inertia channel upper plate 200b, and a complete T-shaped groove (with a T-shaped section and a circular ring shape as a whole) 206 is formed after matching and installation and is used for fixing the magnetorheological elastomer decoupling film 210; the joint surface of the inertia channel upper plate 200a and the inertia channel upper plate 200b is also correspondingly provided with a half coil slot and a half inertia channel, and the inertia channel upper plate 200a and the inertia channel lower plate 200b are combined to form a complete coil slot 207, an inertia channel 203 and an inertia channel opening 203 a. Meanwhile, the inertia channel upper plate 200a and the inertia channel upper plate 200b (except for the reserved coil slots 207 and the inertia channel 203) are sealed at the joint surface by a vulcanization or gluing technology, so that liquid is prevented from seeping out of the inertia channel 203.
The excitation device portion mainly includes a first annular permanent magnet 310, a second annular permanent magnet 320, and an electromagnetic coil 330. The first annular permanent magnet 310 is installed at the lower portion of the connecting rod 110, and the spoiler 160 is installed at the lower portion of the connecting rod 110, and the end (lower end) of the connecting rod 110 is threaded and the spoiler 160 and the first annular permanent magnet 310 are fastened by the nut 110 a. The lower portion of the inertia channel lower plate 200b is provided with threaded holes 208 which are uniformly distributed around the circumference, circular holes distributed on the circumference of the second annular permanent magnet 320 are the same in size and coaxial with the threaded holes 208, the second annular permanent magnet 320 is fixed on the inertia channel lower plate 200b through bolts, and the second annular permanent magnet 320 is located on the lower side of the magnetorheological elastomer decoupling film 210. The first annular permanent magnet 310 and the second annular permanent magnet 320 are coaxially and oppositely arranged in parallel. Because the first annular permanent magnet 310 is located at the lower part of the connecting rod 110, when the rubber main spring 120 is compressed to generate deformation and move up and down, the first annular permanent magnet 310 moves up and down along with the connecting rod 110, the distance between the two annular permanent magnets 310 and 320 changes, and further the magnetic field intensity inside the suspension changes, so that the magnetic field intensity around the magnetorheological elastomer decoupling film 210 changes. The method specifically comprises the following steps: when the distance between the two permanent magnets is increased, the generated magnetic field intensity around the magnetorheological elastomer decoupling film 210 is reduced; when the distance between the two permanent magnets is reduced, the generated magnetic field intensity around the magnetorheological elastomer decoupling film 210 is increased, and the rigidity of the magnetorheological elastomer material is changed under the action of the magnetic field, so that the dynamic change of the suspension rigidity is finally shown.
An electromagnetic coil 330 is disposed in the coil groove 207, and the electromagnetic coil 330 may generate a magnetic field when energized. When the suspension needs larger rigidity, the current direction in the electromagnetic coil 300 can be adjusted and the current can be increased, so that the magnetic field generated by the electromagnetic coil 330 and the magnetic field generated by the annular permanent magnet have the same direction, and the strength of the superposed magnetic field in the suspension is increased; similarly, when the suspension needs a smaller stiffness, the current direction in the electromagnetic coil 330 may be adjusted and the current may be increased, so that the magnetic field generated after the electromagnetic coil 330 is energized is opposite to the magnetic field generated by the ring permanent magnet, and the intensity of the superimposed magnetic field inside the suspension is further reduced.
Meanwhile, since the first annular magnetorheological elastomer 220 and the second annular magnetorheological elastomer 230 are arranged between the suspension housing and the inertia channel plate, the rigidity and the damping can also change along with the change of the surrounding magnetic field. The shear damping force generated between the first annular magnetorheological elastomer 220 and the suspension upper shell 130, and between the second annular magnetorheological elastomer 230 and the suspension lower shell 140 can reduce the vibration impact energy from the power assembly, thereby playing a role in damping vibration.
In the present embodiment, the spoiler 160 includes a base portion 161 and a spoiler 162, the base portion 161 having a disk shape and having a central through hole; and is mounted on the connecting rod 110 by interference fit through the central through-hole. The spoiler 162 is fixedly connected to the outer edge of the base portion 161 along the circumferential direction of the base portion, and an included angle is formed between the spoiler 162 and the base portion 161; wherein the spoiler 162 is disposed toward the bottom plate of the base portion. Through setting up the spoiler, can receive when assaulting at the suspension, realize the disturbance to the liquid in the suspension cavity to improve the mobility of liquid, in order to accelerate magnetic field intensity's rate of change.
In another embodiment, further adjusting the stiffness of the suspension comprises changing the shape (e.g. saw-toothed) of the inner wall of the inertial channel 203 or filling damping particulate material on the inner wall of the inertial channel 203 to enhance the liquid damping to change the damping characteristics of the channel. Meanwhile, the section shape and the length of the inertia channel 203 can be changed according to the requirements of different vibration isolation rates to ensure that the liquid column resonance frequency is matched with the inertia channel.
As shown in fig. 5-6, the specific working principle of the present invention is: when the power assembly vibrates, the vibration displacement acts on the connecting rod 110 and the rubber main spring 120, and under the action of large-amplitude (usually low-frequency) displacement, the first annular permanent magnet 310 downwards displaces, so that the distance between the first annular permanent magnet 310 and the second annular permanent magnet 320 is reduced, and at the moment, the magnetic field around the magnetorheological elastomer decoupling film 210 is enhanced; if a clockwise current is applied to the electromagnetic coil 330 (as shown in fig. 5), the direction of the magnetic field generated by the electromagnetic coil is the same as that of the magnetic field generated by the permanent magnet, the total magnetic field intensity is further increased, the rigidity of the magnetorheological elastomer decoupling film 210 is increased, and the rigidity equivalent to suspension is increased; meanwhile, since the first annular magnetorheological elastomer 220 and the second annular magnetorheological elastomer 230 are also in a magnetic field environment, they can generate shear damping with the suspension housing and the inertia channel plate, so that the vibration impact from the suspension upper liquid chamber 201 can be further attenuated. The expansion effect of the rubber main spring 120 enables the suspension upper liquid chamber 201 to generate a pumping effect, liquid can oscillate back and forth between the suspension upper liquid chamber 201 and the suspension lower liquid chamber 202 through the inertia channel 210 to generate damping, the vibration energy is consumed, the suspension has the characteristics of large rigidity and large damping, the better vibration damping effect under the impact working condition can be realized, and the performance of the automobile is improved.
When the power assembly vibrates and the vibration amplitude (usually high frequency) is small, the first annular permanent magnet 310 is displaced downwards, the distance between the first annular permanent magnet 310 and the second annular permanent magnet 320 is reduced, and the magnetic field between the magnetorheological elastomer decoupling films 210 is enhanced. If a counter-clockwise current is applied to the electromagnetic coil 330 (as shown in FIG. 6), although the magnetic field generated by the permanent magnet around the MR elastomer decoupling film 210 will increase, the direction of the magnetic field generated by the electromagnetic coil 330 is opposite to the direction of the magnetic field generated by the permanent magnet, and the total magnetic field strength will decrease. The magnetorheological elastomer decoupling film 210 has a reduced stiffness, equivalent to a reduced stiffness of the suspension. Meanwhile, the oscillation of the liquid in the suspension upper liquid chamber 201 and the suspension lower liquid chamber 202 is reduced, and the generated damping is reduced, so that the characteristic of small suspension rigidity and small damping under small-amplitude excitation is met, and the vibration isolation requirement of the power assembly can be better realized.
Meanwhile, the invention also provides a control method for the semi-active control of the engine mount by the magnetorheological elastomer, the semi-active control of the engine mount by the magnetorheological elastomer comprises the steps of monitoring the vehicle speed V and the vehicle weight m in real time by a speed sensor and a weight sensor which are arranged on a vehicle body in the running process of a vehicle, and monitoring the vibration frequency f of the engine in real time by the sensoreAnd the vibration frequency f of the suspensionx。
When the vehicle speed is high, the rigidity of the engine suspension is increased adaptively by controlling the current direction and the current intensity of the electromagnetic coil, so that the vibration isolation performance of the engine suspension is improved.
Wherein when
When the magnet is powered on, the current direction of the magnet coil is controlled to enable the direction of the magnetic field generated by the magnet coil to be the same as that of the magnetic field generated by the annular permanent magnet; and controlling the current intensity through the electromagnetic coil as follows:
wherein, IaIs a first reference current intensity; f. ofeIs the vibration frequency of the engine; f. ofxIs the suspension vibration frequency; v is the vehicle running speed, V0A reference value of the running speed of the vehicle; m is the weight of the whole vehicle, m0Is the weight of the whole vehicleThe reference value of (1).
In another embodiment, the method for controlling semi-active control of engine mount by using magnetorheological elastomer further comprises: when the vehicle speed is low, the rigidity of the engine suspension is reduced adaptively by controlling the current direction and the current intensity of the electromagnetic coil, so that the engine suspension obtains better vibration isolation performance.
When in use
When the magnet is powered on, the current direction of the magnet coil is controlled to enable the direction of the magnetic field generated by the magnet coil to be opposite to that of the magnetic field generated by the annular permanent magnet; and controlling the current intensity passing through the electromagnetic coil as follows:
wherein, IbIs a second reference current intensity; f. ofeIs the vibration frequency of the engine; f. ofxIs the suspension vibration frequency; v is the vehicle running speed, V0A reference value of the running speed of the vehicle; m is the weight of the whole vehicle, m0Is the reference value of the weight of the whole vehicle.
As a further preference, I is set empiricallya＝Ib＝0.5A，V0＝45～60km/h；m0＝1800～2000kg。
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A semi-active control engine mount of magnetorheological elastomer, comprising:
a suspension housing having a top opening;
an inertia passage plate which is annular and is provided in the suspension case, an outer edge portion of the inertia passage plate being fixedly connected to the suspension case;
a decoupling film provided at the center of the inertia path plate, and an outer edge portion of the decoupling film is fixed embedded in the inertia path plate;
the outer edge part of the rubber basement membrane is fixedly connected between the bottom of the inertia channel plate and the inner wall of the shell along the circumferential direction;
the rubber main spring is fixedly connected to the top opening and forms a closed cavity with the suspension shell and the rubber bottom membrane in an enclosing manner;
wherein the inertial channel plate and the decoupling membrane separate the cavity into a first chamber and a second chamber;
the connecting rod is coaxially and fixedly connected with the rubber main spring in a vulcanization mode, and one end of the connecting rod extends into the first cavity;
the first annular permanent magnet is arranged in the first cavity and is coaxially and fixedly connected to the connecting rod;
a second annular permanent magnet disposed in the second chamber and fixedly connected to the inertia track plate;
the first annular permanent magnet and the second annular permanent magnet are coaxially arranged.
2. The semi-active control engine mount of magnetorheological elastomer according to claim 1, wherein an annular accommodating cavity is coaxially formed in the inertia channel plate, and an electromagnetic coil is arranged in the annular accommodating cavity.
3. The semi-active magnetorheological elastomer engine mount of claim 2, further comprising:
the two magneto-rheological elastic rings are respectively embedded in the inner wall of the shell and are coaxially arranged with the inertia channel plate; the two magneto-rheological elastic rings are respectively positioned on two sides of the inertia channel plate.
4. The semi-active magnetorheological elastomer control engine mount of claim 3, wherein an annular seal ring is mounted between the bottom surface of the inertia channel plate and the magnetorheological elastomeric ring.
5. The semi-active magnetorheological elastomer control engine mount according to claim 4, wherein the mount housing defines a plurality of vents in a bottom thereof.
6. The semi-active magnetorheological elastomer engine mount of claim 3, 4, or 5, further comprising:
a spoiler disposed within the first chamber and coaxially fixedly mounted on the connecting rod, wherein the spoiler is disposed on top of the first annular permanent magnet.
7. The semi-active magnetorheological elastomer engine mount of claim 6, wherein the spoiler comprises:
a base body portion having a disk shape and a central through hole; and
the turbulent flow part is fixedly connected to the outer edge of the base body part along the circumferential direction of the base body part, and an included angle is formed between the turbulent flow part and the base body part;
wherein the spoiler is disposed toward a bottom plate of the base portion; the base body portion is connected to the link rod through the center through hole.
8. The semi-active magnetorheological elastomer control engine mount of claim 7, wherein the inertia channel plate has an annular inertia channel therein, and the inertia channel wall is a non-smooth surface.
9. A control method of a semi-active control engine mount of a magnetorheological elastomer, using the semi-active control engine mount of a magnetorheological elastomer according to any one of claims 2 to 8,
when in use
When the magnet is powered on, the current direction of the magnet coil is controlled to enable the direction of the magnetic field generated by the magnet coil to be the same as that of the magnetic field generated by the annular permanent magnet; and controlling the current intensity through the electromagnetic coil as follows:
wherein, IaIs a first reference current intensity; f. ofeIs the vibration frequency of the engine; f. ofxIs the suspension vibration frequency; v is the vehicle running speed, V0A reference value of the running speed of the vehicle; m is the weight of the whole vehicle, m0Is the reference value of the weight of the whole vehicle.
10. The method of controlling a semi-active control engine mount of a magnetorheological elastomer of claim 9, further comprising:
when in use
When the magnet is powered on, the current direction of the magnet coil is controlled to enable the direction of the magnetic field generated by the magnet coil to be opposite to that of the magnetic field generated by the annular permanent magnet; and controlling the current intensity passing through the electromagnetic coil as follows:
wherein, IbIs a second reference current intensity; f. ofeIs the vibration frequency of the engine; f. ofxIs the suspension vibration frequency; v is the vehicle running speed, V0A reference value of the running speed of the vehicle; m is the weight of the whole vehicle, m0For the weight of the entire vehicleA reference value.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112060900A (en) * | 2020-10-10 | 2020-12-11 | 上海汽车集团股份有限公司 | Automobile, power assembly suspension system and torsion-resistant pull rod thereof |
| WO2024020832A1 (en) * | 2022-07-27 | 2024-02-01 | 华为技术有限公司 | Vibration damping device and control method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050087408A1 (en) * | 2003-10-22 | 2005-04-28 | Namuduri Chandra S. | Magnetorheological fluid damper |
| CN102606673A (en) * | 2012-03-26 | 2012-07-25 | 湖南大学 | Load-bearing adjustable zero-stiffness electromagnetic vibration isolator and control method thereof |
| CN104455176A (en) * | 2014-11-27 | 2015-03-25 | 安徽微威胶件集团有限公司 | Novel magneto-rheological elastomer decoupling membrane element |
| CN104747651A (en) * | 2015-01-28 | 2015-07-01 | 合肥工业大学 | Paralleling model semi-active vibration isolator |
| CN105546024A (en) * | 2016-02-23 | 2016-05-04 | 重庆长安汽车股份有限公司 | Multi-mode semi-active hydraulic suspension |
| CN205207525U (en) * | 2015-12-15 | 2016-05-04 | 湖南交通工程学院 | Become elastomer shock absorber from energy supply magnetic current |
| CN108019456A (en) * | 2017-12-15 | 2018-05-11 | 吉林大学 | A kind of double main spring hydraulic mounts of the magnetorheological elastomer containing magneto |
| CN108119597A (en) * | 2017-12-15 | 2018-06-05 | 常州大学 | A kind of intelligent vibration damper available for resonant belt vibration isolation |
-
2019
- 2019-10-23 CN CN201911009882.7A patent/CN110701236B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050087408A1 (en) * | 2003-10-22 | 2005-04-28 | Namuduri Chandra S. | Magnetorheological fluid damper |
| CN102606673A (en) * | 2012-03-26 | 2012-07-25 | 湖南大学 | Load-bearing adjustable zero-stiffness electromagnetic vibration isolator and control method thereof |
| CN104455176A (en) * | 2014-11-27 | 2015-03-25 | 安徽微威胶件集团有限公司 | Novel magneto-rheological elastomer decoupling membrane element |
| CN104747651A (en) * | 2015-01-28 | 2015-07-01 | 合肥工业大学 | Paralleling model semi-active vibration isolator |
| CN205207525U (en) * | 2015-12-15 | 2016-05-04 | 湖南交通工程学院 | Become elastomer shock absorber from energy supply magnetic current |
| CN105546024A (en) * | 2016-02-23 | 2016-05-04 | 重庆长安汽车股份有限公司 | Multi-mode semi-active hydraulic suspension |
| CN108019456A (en) * | 2017-12-15 | 2018-05-11 | 吉林大学 | A kind of double main spring hydraulic mounts of the magnetorheological elastomer containing magneto |
| CN108119597A (en) * | 2017-12-15 | 2018-06-05 | 常州大学 | A kind of intelligent vibration damper available for resonant belt vibration isolation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112060900A (en) * | 2020-10-10 | 2020-12-11 | 上海汽车集团股份有限公司 | Automobile, power assembly suspension system and torsion-resistant pull rod thereof |
| WO2024020832A1 (en) * | 2022-07-27 | 2024-02-01 | 华为技术有限公司 | Vibration damping device and control method |
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|---|---|
| CN110701236B (en) | 2023-12-29 |
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