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SBW (steer-by-wire) device with redundancy function and control method

A technology of steering by wire and function, which is applied in the direction of mechanical steering gear and electric steering mechanism, which can solve the problem that the vehicle can still be turned normally, and achieve the effect of ensuring safety

Pending Publication Date: 2019-05-28
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the published patents introduce redundant safety measures on the structure and control of the steer-by-wire system, especially when the system is used in intelligent driving technology, it cannot guarantee that the vehicle can still steer normally when key components fail, thereby ensuring safety of occupants

Method used

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  • SBW (steer-by-wire) device with redundancy function and control method
  • SBW (steer-by-wire) device with redundancy function and control method
  • SBW (steer-by-wire) device with redundancy function and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a steering-by-wire device with redundant functions, and its structure can be found in figure 1 , including road sense simulation actuators, steering actuators and steer-by-wire control modules.

[0030] Wherein, the road sense simulation actuator 25 includes a steering wheel 1, a steering input shaft 2, a torque sensor 3, a first angle sensor 4, a worm gear mechanism 5, a second angle sensor 6, a road sense motor 7, and a road sense motor rotor position sensor 8 And road sense motor controller9.

[0031] The steering wheel 1 is connected with the steering input shaft 2 to obtain the driver's driving intention. A torque sensor 3 and a first rotation angle sensor 4 are installed between the steering input shaft 2 and the worm gear 5 to detect the driver's hand force and the steering wheel's corner.

[0032] The road sense motor 7 is connected to the steering input shaft 2 through the worm gear mechanism 5 to simulate the road sense feedback torq...

Embodiment 2

[0052] refer to image 3 , this embodiment provides a control method for a steering-by-wire device with a redundant function, which is used to control the steering-by-wire device with a redundant function as described in Embodiment 1, and includes:

[0053] S10. Identify the driver's steering behavior by collecting information such as vehicle speed, steering wheel angle, steering wheel speed, vehicle yaw acceleration, and vehicle lateral acceleration;

[0054] S20. Estimating the steering resistance when the vehicle is running through the identification of the driver's steering behavior, and completing the estimation of the road feeling information of the current driving condition. The flow chart of road sense simulation control (estimation of road sense information) is as follows: Figure 4 As shown, it includes four parts: steering load observation, virtual power assist control, corner limit control and road sense torque synthesis.

[0055] 1) Steering load observation, wh...

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PUM

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Abstract

The invention discloses an SBW (steer-by-wire) device with a redundancy function and a control method. The SBW device with the redundancy function comprises a road feel simulation actuator, a steeringactuator and an SBW control module, wherein the steering actuator comprises a first gear-rack mechanism, a first rack travel sensor, a first steering motor controller, a first steering motor, a firststeering motor rotor position sensor, a second gear-rack mechanism, a second rack travel sensor, a second steering motor controller, a second steering motor, a second steering motor rotor position sensor and a steering engine. By means of the redundant first steering motor and first steering motor controller as well as the redundant second steering motor and second steering motor controller, theSBW system can still steer normally once a fault occurs, and safety of passengers in a vehicle is guaranteed.

Description

technical field [0001] The invention relates to the technical field of an advanced vehicle steering system and its control, in particular to a steering-by-wire device with redundant functions and a control method. Background technique [0002] With the continuous development of automobile technology, the automobile steering system has gone through four stages: mechanical steering, hydraulic power steering, electrohydraulic steering and electric power steering. With the in-depth development of automobile electronic technology, a new type of steering system is required. Widely concerned, that is, steer-by-wire. [0003] 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. The corner transfer characteristics bring unlimited space to the design of automobile steering characteristics, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D3/12
Inventor 王宇张建刘晔刘金波黄海洋韩亚凝
Owner CHINA FIRST AUTOMOBILE
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