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Vehicle steering-by-wire system, fault-tolerant control method and fault diagnosis method

A technology of steer-by-wire and vehicles, which is applied in the direction of automatic steering control components, steering mechanisms, steering rods, etc., and can solve problems such as inability of the steering system, steering operation, and increased vehicle safety hazards

Active Publication Date: 2018-10-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the steer-by-wire system, if there is a problem with the control components of the system or the hub motor, it will cause the steering system of the car to fail to perform timely and effective steering operations, which greatly increases the safety hazards of the vehicle. Therefore, for steer-by-wire For the steering system, fault-tolerant control is very important. The combination of software fault-tolerant and hardware fault-tolerant must be considered in order to better ensure the safety of the vehicle.

Method used

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  • Vehicle steering-by-wire system, fault-tolerant control method and fault diagnosis method
  • Vehicle steering-by-wire system, fault-tolerant control method and fault diagnosis method
  • Vehicle steering-by-wire system, fault-tolerant control method and fault diagnosis method

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Embodiment Construction

[0044] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0045] refer to figure 1 As shown, a vehicle steering-by-wire system of the present invention includes: a steering wheel 1, a steering shaft 2, a torque sensor 3, a recirculating ball steering device 4, a steering rocker arm 5, a steering knuckle arm 6, a steering trapezoid 7, and a hub Motor 8, Electronic Control Unit (ECU) 9, Power Booster Motor 10, Power Steering Pump 11, High Pressure Oil Pipe 12, Control Valve 13, Rotary Valve 14, Hydraulic Booster Cylinder 15, Oil Return Pipe 16, Fuel Tank 17, Hub Motor Controller 18 , a speed / acceleration sensor 19 and a wheel 20; the steering wheel 1 is connected to the torque input end of the steering shaft 2, and the torque sensor 3 is placed betwe...

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Abstract

The invention discloses a vehicle steering-by-wire system, a fault-tolerant control method and a fault diagnosis method. A steering actuator of the system is composed of a redundant electro-hydraulicpower-assisted steering system module and a wheel hub motor differential steering system module. The system can realize a differential steering function and realize a power-assisted steering functionthrough the redundant electro-hydraulic power-assisted steering system module, the problem that a vehicle cannot steer due to fault of a wheel hub motor is avoided, and the driving safety of the vehicle is ensured.

Description

technical field [0001] The invention belongs to the technical field of vehicle steering systems, and specifically refers to a heavy-duty vehicle steering-by-wire system, a fault-tolerant control method and a fault diagnosis method. Background technique [0002] With the development of science and technology, the traditional steering system of automobiles has also ushered in innovation, and a steering-by-wire system has appeared, which controls the hub motors on the wheels through the ECU to realize the steering of the car. The steer-by-wire system liberates the vehicle steering system from the traditional mechanical steering mechanism, forming a new advanced steering system with four wheels that can be steered independently. Compared with the traditional steering system, it has more controllable degrees of freedom, so it can realize special functions such as in-situ steering, oblique travel and lateral movement that cannot be completed by conventional cars, which greatly imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D5/06B62D5/10B62D5/30B62D6/00B62D101/00B62D103/00B62D137/00
CPCB62D5/001B62D5/0463B62D5/0481B62D5/06B62D5/10B62D5/30B62D6/00Y02T10/72
Inventor 乔岩栾众楷赵万忠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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