Fault-tolerant system and method for steer-by-wire
A technology of steering-by-wire and fault-tolerant system, applied in the field of fault-tolerant system of steering-by-wire, can solve the problems of lack of fault-tolerant function and hydraulic and differential coupling function, difficulty in ensuring vehicle steering safety, complex structure of fault-tolerant system, etc. Simple, easy-to-implement, and secure performance
Active Publication Date: 2021-07-20
JIANGSU UNIV
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Problems solved by technology
In the existing research technology, the structure of the fault-tolerant system with fault-tolerant function is generally very complicated. When a fault occurs, the execution speed is slow, the control accuracy is not high, and it is difficult to ensure the steering safety of the car when the fault occurs; Brake power steering, but without fault tolerance and hydraulic and differential coupling
Method used
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Embodiment Construction
[0031] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited thereto.
[0032] Such as figure 1 As shown, a steering-by-wire fault-tolerant system includes a hydraulic oil tank 1, wheels (including left front wheel 8 and right front wheel 21), hydraulic cylinder 12, signal acquisition unit, electronic control unit ECU13 and actuators. The left front wheel 8 is provided with a left brake 5, a left wheel speed sensor 6 and a left brake disc 7. The left brake 5 is installed inside the left front wheel 8, and the left brake disc 7 is installed on the axle of the left front wheel 8. Left wheel speed sensor 6 is also installed on the front wheel 8; Right front wheel 21 is provided with right brake 18, right wheel speed sensor 19, right brake disc 20, and right brake 18 is installed in right front wheel 21 inside, right brake disc 20 Be installed...
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The invention discloses a fault-tolerant system and method for steer-by-wire. A first electromagnetic valve is arranged on the hydraulic pipeline connecting the hydraulic oil tank and the left brake, and a fourth electromagnetic valve is arranged on the hydraulic pipeline connecting the hydraulic oil tank and the right brake. Both the left half and the right half of the cylinder are connected to the brake, the hydraulic pipeline connecting the left half and the brake is provided with a second solenoid valve, and the hydraulic pipeline connecting the right half and the brake is provided with a third solenoid valve; the above solenoid valve Both are connected to the electronic control unit ECU, and the electronic control unit ECU realizes the switching between the steer-by-wire steering mode and the integrated steering mode of the steering system according to whether the steering motor is faulty. The invention has a simple structure and is easy to implement, and adopts double fault detection to ensure the timeliness of finding the fault of the steering motor.
Description
technical field [0001] The invention belongs to the technical field of steering systems, and in particular relates to a fault-tolerant system and method for steering by wire. Background technique [0002] The car steering system is the key assembly that determines the active safety of the car. The traditional car steering system is a mechanical system. The steering movement of the car is realized by the driver manipulating the steering wheel and transmitting it to the steering wheel through the steering gear and a series of rods. . The steering-by-wire system cancels the mechanical connection between the steering wheel and the steering wheel, and the steering is completely realized by electric energy, which gets rid of various restrictions of the traditional steering system. Corner transfer characteristics, thereby improving the handling of the car, and improving the comfort of the ride. [0003] Differential steering technology is a new steering technology based on the el...
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IPC IPC(8): B62D5/04B62D5/06B62D5/09
CPCB62D5/0463B62D5/0487B62D5/061B62D5/091
Inventor 徐兴刘振宇王峰江昕伟苏鹏威
Owner JIANGSU UNIV