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Fault-tolerant device and method of steering system, and vehicle

A steering system and steering column tube technology, applied in the field of steering system research, can solve problems such as the steering wheel angle does not correspond to the steering wheel angle, loss of steering ability, etc., and achieve the effects of simple structure, guaranteed steering ability, and reliable work

Active Publication Date: 2019-05-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, after the failure of the road sense motor or the steering motor, the mechanical steering is restored after the conversion of the two modes, so as to ensure the driver’s ability to control the steering of the vehicle in an emergency situation, and solve the problem that the angle of the steering wheel and the angle of the steering wheel do not match when the steering-by-wire system fails. Corresponding problems and the problem of losing steering ability after a failure

Method used

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  • Fault-tolerant device and method of steering system, and vehicle
  • Fault-tolerant device and method of steering system, and vehicle
  • Fault-tolerant device and method of steering system, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] figure 1 Shown is an embodiment of a steering system fault-tolerant device, which includes an actuator, a detection mechanism and a control unit ECU10.

[0052] The actuator includes a first steering column tube 2, an electromagnetic locking component 4, a second steering column tube 6, a road sensor motor 9, a steering motor 12 and a steering gear; one end of the first steering column tube 2 is used for The steering wheel 1 is connected, and the other end is locked or separated from one end of the second steering column tube 6 through the electromagnetic locking part 4; the road induction motor 9 is connected with the first steering column tube 2 through the first reduction mechanism 3, and the steering The motor 12 is connected to the second steering column tube 6 through the second reduction mechanism 5, and the other end of the second steering column tube 6 is connected to the steering gear;

[0053] The detection mechanism is used to detect the steering wheel angl...

Embodiment 2

[0071] A vehicle, the steering system fault-tolerant device described in Embodiment 1, therefore has all the beneficial effects described in Embodiment 1, and will not be repeated here.

Embodiment 3

[0073] like Figure 4 As shown, a control method of a steering system fault-tolerant device according to Embodiment 1, comprising the following steps:

[0074] Data acquisition: the detection mechanism detects the steering wheel angle θ2' signal and the front wheel angle θ2 signal and transmits them to the control unit ECU10;

[0075] Mode selection and control: the control unit ECU10 judges whether to enter the angle alignment mode or the lock mode according to the fault signal and the difference between the steering wheel angle θ2′ and the front wheel angle θ2; and controls the road sense motor 9 and the steering motor 12 And the work of the electromagnetic locking part 4.

[0076] Preferably, the mode selection and control are specifically:

[0077] When the fault detection module of the control unit ECU10 detects a fault in the steer-by-wire system, and the fault is diagnosed as a fault in the road induction motor 9, it enters into the angle alignment mode and lock mode ...

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Abstract

The invention provides a fault-tolerant device and method of a steering system, and a vehicle. The fault-tolerant device comprises an execution mechanism, a detection mechanism and an electronic control unit (ECU); the execution mechanism comprises a first steering column pipe, an electromagnetic locking part, a second steering column pipe, a road sensing motor, a steering motor and a steering gear; one end of the first steering column pipe is used for being connected with a steering wheel, and the other end of the first steering column pipe is locked with or separated from one end of the second steering column pipe through the electromagnetic locking part; the road sensing motor is connected with the first steering column pipe through a first decelerating mechanism, the steering motor isconnected with the second steering column pipe through a second decelerating mechanism, and the other end of the second steering column pipe is connected with the steering gear; the detection mechanism is used for detecting a steering wheel rotating angle signal and a front wheel rotating angle signal; and the ECU is connected with the detection mechanism, the road sensing motor, the steering motor and the electromagnetic locking part. After the road sensing motor or the steering motor breaks down, mechanical steering is recovered through conversion of the two modes, and the steering manipulation ability of a driver to the vehicle under the breakdown emergency situation is ensured.

Description

technical field [0001] The invention belongs to the field of steering system research, and in particular relates to a steering system fault-tolerant device and method and a vehicle. Background technique [0002] Steering by wire cancels the mechanical connection between the steering wheel and the front steering wheel, which improves the driving characteristics, enhances the maneuverability, improves the driver's sense of the road, and enhances the comfort of the car. However, when the steering-by-wire system fails, it is easy to lose the steering ability, and the safety of the driver and passengers cannot be guaranteed. In the prior art, a clutch is provided to connect the first steering column to the second steering column to recover its mechanical steering function. In the prior art, a first position sensor is installed on the first rotating plate, and a second position sensor is installed on the second rotating plate to receive the signal of the relative rotation angle o...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D15/02B62D5/02
Inventor 徐兴苏鹏威王峰解炬江浩斌
Owner JIANGSU UNIV