CN216185441U - Electric automobile active steering system with fault diagnosis function - Google Patents
Electric automobile active steering system with fault diagnosis function Download PDFInfo
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- CN216185441U CN216185441U CN202122360090.3U CN202122360090U CN216185441U CN 216185441 U CN216185441 U CN 216185441U CN 202122360090 U CN202122360090 U CN 202122360090U CN 216185441 U CN216185441 U CN 216185441U
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Abstract
The utility model discloses an electric automobile active steering system with fault diagnosis, which comprises: the system comprises a signal acquisition module, a vehicle control unit, a motor controller, a steering power-assisted motor and a motor fault diagnosis module, wherein the signal acquisition module comprises a torque controller, a corner sensor and a wheel speed sensor; a signal acquisition end of the vehicle controller is connected with vehicle running state signals acquired by each sensor of the signal acquisition module, generates steering control signals and sends the steering control signals to the motor controller; the motor controller receives a steering control signal from the vehicle control unit, and the steering process of the electric vehicle is controlled by adjusting the current voltage to output corresponding torque by the steering power-assisted motor. Meanwhile, a motor fault diagnosis module is additionally arranged in the active steering system and comprises a motor sensor, a data fusion module and a display screen. The utility model considers the motor fault diagnosis on the basis of improving the driving comfort, and further improves the reliability and the driving safety of the vehicle active steering system.
Description
Technical Field
The utility model belongs to the technical field of active steering of electric automobiles, and particularly relates to an active steering system of an electric automobile with motor fault diagnosis.
Background
In the automobile industry, the active steering system can effectively solve the problem that the traditional steering system cannot give consideration to the steering portability at low speed and the steering stability at high speed, and gradually becomes the development direction of the modern automobile steering system. However, since the vehicle operation scene is complicated and varied, external disturbances such as vibration of the vehicle and poor connection of the vehicle-mounted power supply affect the reliability of the vehicle-mounted electrical system, and the actual output of the motor greatly deviates from the expected value. The deviation is mainly reflected in two aspects, one is that the actual output efficiency of the motor is lower than 100%, and the other is that the output torque of the motor has larger amplitude fluctuation; this situation may lead to a reduction in the stability and driving safety of the vehicle during steering.
In the 'automobile active steering system (CN 210101744U) combining the EPS and the EPHS of the commercial vehicle', an entire ECU sends out control instructions by receiving measurement signals of a vehicle-mounted sensor to respectively control a steering power-assisted motor and a hydraulic power-assisted motor to work in a coordinated manner, so that the defect of insufficient power of the traditional single EPS is overcome, and the control effect of the active steering system is improved. However, the technology of the patent does not consider the complexity and the vulnerability of an electrical system, and the problem of the failure of the motor is easily caused under the variable driving conditions of the vehicle, so that the reliability of the active steering system of the vehicle is deficient.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art described above.
Therefore, the utility model provides the active steering system of the electric automobile with the fault diagnosis, which improves the driving comfort of the automobile on one hand and can effectively improve the reliability and the driving safety of an electric system of the automobile on the other hand.
The utility model provides an electric automobile active steering system with fault diagnosis, which comprises a signal acquisition module, a steering wheel, a steering column, a steering tie rod, a motor fault diagnosis module, a vehicle control unit, a power-assisted steering motor, a motor controller and wheels,
one end of a steering column is connected with a steering wheel, the other end of the steering column is connected with a steering tie rod, wheels are connected with the steering tie rod, a power steering motor is connected with the steering column, and the output end of a motor controller is connected with the power steering motor;
the signal acquisition module is used for acquiring running state signals of the vehicle and is connected with the input end of the whole vehicle controller; the output end of the vehicle controller is connected with the input end of the motor controller, the signal acquisition end of the vehicle controller is connected with the signal acquisition module to acquire a vehicle running state signal, and a steering control signal is generated at the signal output end through calculation and is sent to the motor controller; and a signal acquisition end of the motor controller receives a signal from the vehicle control unit, and the steering power-assisted motor outputs corresponding torque by adjusting current and voltage to drive a steering tie rod so as to adjust the rotation angle of the front wheel and execute the steering process of the vehicle.
The fault diagnosis module comprises a motor sensor and a data fusion module, wherein the motor sensor is used for collecting parameters of the power steering motor during operation, the data fusion module is used for generating a motor operation condition signal according to the parameters collected by the motor sensor, and when the motor operation condition signal exceeds a preset threshold value, the motor fault diagnosis module sends a fault warning signal. The fault diagnosis module is used for receiving the operation parameter signal of the power steering motor and sending the operation parameter signal to the data fusion module, then generating a motor operation parameter signal, and sending a fault warning signal when the operation state signal exceeds a set threshold value.
Furthermore, the steering column device also comprises a speed reducer, and the power steering motor is connected with the steering column through the speed reducer.
Further, the signal acquisition module comprises a torque sensor for acquiring a torque signal, a corner sensor for acquiring a front wheel corner signal and a wheel speed sensor for acquiring a wheel speed signal, and the torque sensor, the corner sensor and the wheel speed sensor are all connected with the input end of the vehicle control unit.
Further, a torque sensor is provided on the steering column, a rotation angle sensor is provided on the tie rod, and a wheel speed sensor is provided on the wheel.
Further, the motor fault diagnosis module further comprises a display screen, the display screen is connected with the data fusion module, and when the motor running state signal exceeds a preset threshold value, the motor fault diagnosis module sends out a fault warning signal through the display screen.
Further, the motor sensor comprises a vibration sensor for acquiring the amplitude and vibration frequency of the motor during operation, a pressure sensor for acquiring dynamic pressure and a temperature sensor for acquiring the temperature of the motor. The motor operation parameters are collected by corresponding motor sensors, including amplitude, vibration frequency, dynamic pressure, and motor temperature.
Further, the vibration sensor and the pressure sensor are provided at a bearing position of the steering assist motor, and the temperature sensor is provided at a cooler position of the steering assist motor.
Compared with the prior art, the utility model has the beneficial effects that: a fault diagnosis module aiming at a steering execution motor is added in the active steering system, so that when the running condition of the motor exceeds the standard, a driver and passengers can learn about the fault problem and check the fault problem in time, and the reliability of the active steering system and the driving safety of a vehicle are effectively improved on the premise of improving the driving comfort by using the active steering system.
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Advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings, in which fig. 1 is a schematic structural view of an active steering system of an electric vehicle including fault diagnosis according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the components used in the present invention are commercially available. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 is a schematic structural diagram of an active steering system of an electric vehicle with fault diagnosis according to an embodiment of the present invention. The system comprises a signal acquisition module 220, a steering wheel 110, a steering column 120, a speed reducer 190, a steering tie rod 200, a fault diagnosis module 180, a vehicle control unit 230 (a vehicle body control module ECU of a United automobile electronics company is selected), a power steering motor 260, a motor controller 270 (a model MC3902 of the Intel corporation is selected), and wheels 280.
One end of the steering column 120 is connected to the steering wheel 110, the other end is connected to the tie rod 200, the wheel 280 is connected to the tie rod 200, the power steering motor 260 is connected to the steering column 120, the input end of the motor controller 270 is connected to the output end of the vehicle control unit 230, the output end is connected to the power steering motor 260, and the output shaft of the power steering motor 260 is connected to the steering column 120 through the reducer 190.
The signal acquisition module 220 is used for acquiring the running state signal of the vehicle, and includes a torque sensor 140 (a TAS sensor of HELLA corporation, germany) mounted on the steering column 120, a rotation angle sensor 240 (a TAS sensor of HELLA corporation, germany) mounted on the tie rod 200, and a wheel speed sensor 250 (a sensor of a19250 type of Allegro corporation, polish) mounted on the wheel 280, and the torque sensor 140, the rotation angle sensor 240 and the wheel speed sensor 250 are respectively connected to three signal input ends of the vehicle controller 230.
The signal output end of the vehicle control unit 230 is connected with the motor controller 270, the signal acquisition end of the motor controller 270 receives a signal from the vehicle control unit 230, the signal output end is connected with the power steering motor 260, and the power steering motor 260 is connected with the signal output end of the motor controller 270.
The fault diagnosis module 180 includes a motor sensor unit, a data fusion module 130 (optionally microcontroller ARC-625D), and a display screen 210. The motor sensor unit is used for acquiring parameters of the power steering motor 260 during operation, and comprises a vibration sensor 150 (of a precision technology ASVxxCA type), a pressure sensor 160 (of a Zetian sensing technology CYB230 type) and a temperature sensor 170 (of a Zetian sensing technology CWB120 type) which are arranged at a bearing position, wherein the vibration sensor 150 is arranged at a bearing position. The data fusion module is used for analyzing the collected motor operation parameters and giving out an operation state signal, and the internal data fusion algorithm is the existing algorithm and can adopt Bayes estimation, weighted average fusion, fuzzy logic reasoning and the like. When the motor operating condition signal exceeds a set threshold, a fault warning signal is sent by the display screen 210.
It will be appreciated that the particular model of product given above is only one specific example, and in other embodiments, other models may be used.
Specifically, the working process of the active steering system provided by the embodiment of the utility model is as follows:
1. the signal collection module 220 collects vehicle operation state signals including a front wheel rotation angle signal, a torque signal and a wheel speed signal, which are collected by the torque sensor 140, the rotation angle sensor 240 and the wheel speed sensor 250, and sends the signals to the vehicle control unit 230.
2. During the driving process of the vehicle, after the signal acquisition end of the vehicle control unit 230 receives the signal sent from the signal acquisition module 220, the vehicle control unit 230 sends a steering control signal to the motor controller 270 at the signal output end through calculation.
3. The motor controller 270 receives a steering control signal from the vehicle control unit 230, outputs an expected torque signal to the power steering motor 260, and the output expected torque signal drives the tie rod 200 via the reducer 190, so as to adjust the steering angle of the front wheels and perform the steering process of the vehicle.
4. The motor sensor unit collects the operation parameters of the motor in real time during the operation of the power steering motor 260, and the data fusion module 130 in the motor fault diagnosis module 180 generates a motor operation state signal by receiving the operation parameter signal of the power steering motor 260, so as to determine the motor fault condition. The motor operation parameters are collected by corresponding sensors, and the collected parameters comprise amplitude, vibration frequency, dynamic pressure and motor temperature. When the motor running state signal exceeds the set threshold, the display screen 210 sends a fault warning signal to remind a driver to take over or stop the vehicle for inspection, so that the reliability of the active steering system and the running safety of the vehicle are improved.
In summary, according to the active steering system of the electric vehicle with fault diagnosis provided by the embodiment of the present invention, through the mutual coordination of the signal acquisition module 220, the vehicle controller 230, the motor controller 270, the power-assisted steering motor 260 and the motor fault diagnosis module 180, on one hand, the portability and the stability of the steering process are improved, and meanwhile, due to the addition of the fault diagnosis module 180 for the steering execution motor, the reliability of the active steering system and the driving safety of the vehicle are improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electric automobile active steering system with fault diagnosis is characterized by comprising a signal acquisition module (220), a steering wheel (110), a steering column (120), a steering tie rod (200), a motor fault diagnosis module (180), a vehicle control unit (230), a power-assisted steering motor (260), a motor controller (270) and wheels (280),
one end of a steering column (120) is connected with a steering wheel (110), the other end of the steering column is connected with a steering tie rod (200), wheels (280) are connected with the steering tie rod (200), a power steering motor (260) is connected with the steering column (120), and the output end of a motor controller (270) is connected with the power steering motor (260);
the signal acquisition module (220) is used for acquiring running state signals of a vehicle, the signal acquisition module (220) is connected with the input end of the vehicle controller (230), and the output end of the vehicle controller (230) is connected with the input end of the motor controller (270);
the fault diagnosis module (180) comprises a motor sensor unit and a data fusion module (130), wherein the motor sensor unit is used for collecting parameters of the power steering motor (260) during operation, the data fusion module (130) is used for generating a motor operation condition signal according to the parameters collected by the motor sensor unit, and when the motor operation condition signal exceeds a preset threshold value, the motor fault diagnosis module (180) sends a fault warning signal.
2. The active steering system of an electric vehicle with fault diagnosis as claimed in claim 1, further comprising a speed reducer (190), wherein the power steering motor (260) is connected with the steering column (120) through the speed reducer (190).
3. The active steering system of an electric vehicle with fault diagnosis as claimed in claim 1, wherein the signal acquisition module (220) comprises a torque sensor (140) for acquiring a torque signal, a rotation angle sensor (240) for acquiring a front wheel rotation angle signal and a wheel speed sensor (250) for acquiring a wheel speed signal, and the torque sensor (140), the rotation angle sensor (240) and the wheel speed sensor (250) are all connected with an input end of the vehicle controller (230).
4. The active steering system with fault diagnosis for electric vehicles according to claim 3, wherein the torque sensor (140) is provided on the steering column (120), the rotation angle sensor (240) is provided on the tie rod (200), and the wheel speed sensor (250) is provided on the wheel (280).
5. The active steering system with fault diagnosis for electric vehicles as claimed in claim 3, wherein the wheel speed sensor (250) is a sensor of type A19250.
6. The active steering system of an electric vehicle with fault diagnosis as claimed in claim 1, wherein the motor fault diagnosis module (180) further comprises a display screen (210), the display screen (210) is connected with the data fusion module (130), and when the motor operating condition signal exceeds a preset threshold value, the motor fault diagnosis module (180) sends out a fault warning signal through the display screen (210).
7. The active steering system of an electric vehicle with fault diagnosis according to any one of claims 1 to 6, wherein the motor sensor unit comprises a vibration sensor (150) for acquiring the amplitude and the frequency of vibration when the motor is running, a pressure sensor (160) for acquiring dynamic pressure, and a temperature sensor (170) for acquiring the temperature of the motor.
8. The active steering system of an electric vehicle with fault diagnosis as set forth in claim 7, wherein the vibration sensor (150) and the pressure sensor (160) are disposed at a bearing position of the power steering motor (260), and the temperature sensor (170) is disposed at a cooler position of the power steering motor (260).
9. The active steering system with fault diagnosis for electric vehicles according to claim 7, characterized in that the vibration sensor (150) is of the asvxxca type.
10. The active steering system of an electric vehicle with fault diagnosis as claimed in claim 7, wherein the temperature sensor (170) is of the CWB120 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122360090.3U CN216185441U (en) | 2021-09-27 | 2021-09-27 | Electric automobile active steering system with fault diagnosis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122360090.3U CN216185441U (en) | 2021-09-27 | 2021-09-27 | Electric automobile active steering system with fault diagnosis function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216185441U true CN216185441U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122360090.3U Expired - Fee Related CN216185441U (en) | 2021-09-27 | 2021-09-27 | Electric automobile active steering system with fault diagnosis function |
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| Country | Link |
|---|---|
| CN (1) | CN216185441U (en) |
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2021
- 2021-09-27 CN CN202122360090.3U patent/CN216185441U/en not_active Expired - Fee Related
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Granted publication date: 20220405 |