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Timely four-wheel compound steering system and multi-objective optimization method thereof

A steering system, four-wheel steering technology, applied in steering mechanism, electric steering mechanism, power steering mechanism, etc., can solve the problems of increasing the complexity of vehicle layout and affecting the system, etc.

Active Publication Date: 2018-02-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a timely four-wheel drive compound steering system and its multi-objective optimization method to solve the problems of the compound steering system in the prior art that increase the complexity of the vehicle layout and the problems of the system and work. The switching of the state affects the stability of the system working state

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  • Timely four-wheel compound steering system and multi-objective optimization method thereof

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Embodiment Construction

[0073] 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.

[0074] refer to figure 1 As shown, a timely four-wheel drive compound steering system of the present invention includes a differential steering system and a control-by-wire four-wheel steering system;

[0075] The differential steering system includes a steering wheel 1, a vehicle speed sensor, a vehicle body lateral acceleration sensor, a yaw rate sensor, a torque angle sensor 2, a steering shaft 3, a rack and pinion steering mechanism 4, a linkage mechanism, and a differential steering control system. Unit 13, left front wheel hub motor 10, right front wheel hub motor 6;

[0076] The four-wheel steer-by-wire system includes a steering wheel 1, a vehicle speed sensor, a vehicle body latera...

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Abstract

The invention discloses a timely four-wheel compound steering system and a multi-objective optimization method thereof. The system comprises a differential steering system and a four-wheel steering-by-wire system, and four individual wheel hub motors are adopted to achieve power-assisted steering. According to the timely four-wheel compound steering system, based on the differential steering system, the four-wheel steering-by-wire system and an electronic assistant system are additionally arranged, so that the timely four-wheel compound steering system can switch between a two-wheel differential steering mode and a four-wheel steering-by-wire mode to achieve car steering according to different working conditions of a car. Based on the timely four-wheel compound steering system, the multi-objective optimization method is provided. According to the method, by selecting partial parameters of the steering system as optimization variables, building a target function, setting constraint conditions, building a model of the timely four-wheel compound steering system and adopting a harmony searching algorithm, multi-objective optimization is conducted on the timely four-wheel compound steering system.

Description

technical field [0001] The invention relates to the technical field of steering systems, in particular to a timely four-wheel drive compound steering system and a multi-objective optimization method thereof. Background technique [0002] The differential steering system changes the driving force of the left and right steering wheels by adjusting the driving torque of the left and right steering wheels, and generates driving steering torque to complete the steering. The differential steering system adopts hub motor technology, which integrates the power, transmission and braking devices in the hub, omitting the complicated mechanical transmission system, greatly simplifying the vehicle structure, saving the layout space, and the torque response is accurate and fast, so that Car steering is done more easily and precisely. However, the tires of differential steering wear a lot, and it is difficult to ensure that the tires are in a rolling state on gravel roads or in rainy and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D11/06
CPCB62D5/0421B62D11/003B62D11/06
Inventor 王云琦赵万忠王春燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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