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Control strategy for sliding steering of four-wheel-hub motor driven vehicles

A hub motor and steering control technology, which is applied to automatic steering control components, steering mechanisms, steering rods, etc., can solve the problem of difficult control of the steering system's operating space

Active Publication Date: 2014-08-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is: for the existing four-wheel steer-by-wire four-wheel hub motor-driven vehicle, when the steering system fails, the running space is limited or the direction of the special road surface is difficult to control, to design a vehicle that can realize sliding Steering control strategy, but does not need to add special steering mechanism and additional drive device

Method used

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  • Control strategy for sliding steering of four-wheel-hub motor driven vehicles
  • Control strategy for sliding steering of four-wheel-hub motor driven vehicles
  • Control strategy for sliding steering of four-wheel-hub motor driven vehicles

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0032] The skid steer control strategy is implemented as Figure 4 The shown four-wheel steer-by-wire four-wheel hub motor drive vehicle structure platform, the vehicle structure uses four identical hub motors to directly drive the wheels, the steering wheel and its angular displacement sensor 1, the accelerator pedal and its displacement sensor 2 , brake pedal and its displacement sensor 3, electronic gear switch 4, steering mode switch 5, energy management unit 6, energy absorbing device 7, hub motor controller 8a, hub motor controller 8b, hub motor controller 8c, hub Motor controller 8d, steering motor controller 9a, steering motor controller 9b, steering motor controller 9c, steering motor controller 9d, steering motor 10a, steering motor 10b, steering motor 10c, steering motor 10d, hub motor 11a, hub Motor 11b, hub motor 11c, ...

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Abstract

The invention discloses a control strategy capable of realizing sliding steering in allusion to the conventional four-wheel-hub motor driven vehicles with wire controlled four-wheel steering. According to the control strategy, a sliding steering mode can be switched through a steering switch when a steering system of a vehicle is in failure, the operation space of the vehicle is limited, and the vehicle encounters a special road surface; a comprehensive electronic controller is used for judging the steering trend of the vehicle according to a corner displacement signal of a steering wheel; and output torques of four hub motors are directly controlled through a sliding steering torque distributor and then the speed difference requirements between the wheels at two sides during the steering are satisfied, so that the sliding steering with different turning radius can be realized. Through the sliding steering control strategy provided by the invention, the direction controllability of vehicles can be fully ensured on the basis of the conventional four-wheel steering.

Description

technical field [0001] The invention relates to a sliding steering control strategy, which can realize the sliding steering of the vehicle when the sliding steering control strategy is applied to a vehicle driven by four-wheel hub motors with four-wheel steering controlled by wire. Background technique [0002] Four-wheel steering four-wheel hub motor drive The four wheels of the vehicle are driven by the same structure of the hub motor, relying on the steering system to change the corners of the four wheels to achieve steering, which greatly improves the low-speed maneuverability and high-speed handling stability of the car. sex. The structures of commonly used four-wheel steering systems are roughly: mechanical, hydraulic, electric, etc. Most of the four-wheel steering by wire uses four steering motors to control the deflection of the four wheels. But there is a problem that once the steering system breaks down and the wheels cannot be deflected, the direction of the veh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D6/00B62D113/00B62D137/00
Inventor 翟丽冯慧霞周岩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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