Dual-motor steer-by-wire system based on dual-winding motor and multi-objective optimization method

Abstract

The invention discloses a dual-motor wire-control steering system based on a double-winding motor and a multi-objective optimization method. The system includes: a mechanical transmission module, a first motor booster module, a double-winding motor booster module and a main controller; Each motor is arranged on the steering tie rod, which reduces the mechanical coupling and interference of the motor power assist and improves the reliability of the steering system; and adopts the working mode of the double-winding motor with two windings working at the same time, so that the double-winding motor can be used in a limited installation space. Compared with the single-winding motor, it can output a larger torque; and it has the redundant function of motor windings. If one set of windings fails, the other set of windings can still drive the motor to generate power-assisted torque, which enhances the driving safety of the car; and based on The multi-objective optimization algorithm of NSGA-II optimizes the key parameters of the steering system, and obtains a set of solutions with better comprehensive steering performance.

Description

technical field [0001] The invention belongs to the technical field of automobile steering systems, and in particular relates to a dual-motor wire-controlled steering system based on a dual-winding motor and a multi-objective optimization method. Background technique [0002] With the increasing intelligence of automobiles, each module on the automobile gradually tends to be designed by wire, among which steering by wire is a hot research topic at present. The steering accuracy in steer-by-wire is particularly important to the comprehensive performance of the steering system, how to improve the steering accuracy of the steering system is a problem worth studying. [0003] Existing steering-by-wire systems usually use dual-motor actuators. For example, Chinese patent application number CN201910222088.4 discloses a method that superimposes the output torque of two motors on the intermediate shaft through gears, and then passes the torque The coupler couples the superimposed t...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art above, the purpose of the present invention is to provide a dual-motor steer-by-wire system based on a dual-winding motor and a multi-objective optimization method to overcome the low reliability of the steering system and power-assisted steering in the prior art. small moment problem

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