Drive-by-wire differential steering system for wheel type independent drive vehicle and control method thereof

Abstract

The invention relates to a drive-by-wire differential steering system for a wheel type independent drive vehicle, the system comprising: an information detection module for detecting various state information of the vehicle; a controller used for judging steering modes according to the various kinds of detected state information of the vehicle, including a steer-by-wire mode and a drive-by-wire differential steering mode, deciding target torque required by each motor, and sending corresponding motor control signals; and a steering execution module used for making a corresponding torque response according to the motor control signal so as to drive the steering mechanism to move and realize differential steering of the electric automobile. The invention further discloses a control method ofthe drive-by-wire differential steering system for the wheel type independent drive vehicle. The invention also provides a control method of the drive-by-wire differential steering system for a wheeltype independent drive vehicle. Front axle left and right wheel hub motors serve as steering power sources, so that steering mechanical connection, a steering power assisting device and the like are omitted, the structure of a steering system is simplified, the available space in a vehicle is increased, system integration is easier, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of an automobile steering system and a control method thereof, in particular to a control-by-wire differential steering system and a control method thereof for a wheel-type independently driven vehicle. Background technique [0002] The wheel-type independent drive electric vehicle installs the hub motor directly on each wheel, removes the vehicle transmission system, has the unique advantages of independent controllable and measurable torque of each wheel, and rapid and accurate torque response. Therefore, the torque output on a single wheel can be changed in time as required, effectively improving the maneuverability, stability and safety of the vehicle. [0003] Most of the existing steering systems of wheeled independent drive electric vehicles are to assist the driver in steering operations by adding a steering assist device on the basis of the traditional mechanical steering system, such as the existin...

AI Technical Summary

Problems solved by technology

This also leads to a series of problems such as complex structure of the steering system, difficulty in integrated layout, and high cost.

At the same time, as a new concept of steer-by-wire system, the steering operation is realized by cutting off the steering mechanical connection and installing the steering motor by wire. The structure is simple and easy to integrate, but its reliability is difficult to guarantee

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