Front wheel and rear wheel drive steering control system of automobile

A technology of active steering and rear wheel steering, applied in automatic steering control components, steering mechanisms, steering rods, etc., can solve the problem of inability to control the yaw rate and the center of mass side slip angle at the same time, and achieve improved lateral dynamic performance, Improved driving characteristics and enhanced handling stability

Inactive Publication Date: 2010-01-06
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

However, since there is only one independent control input, it is not possible to simultaneously control the yaw rate and the sideslip angle in the lateral dynamics of the vehicle

Method used

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  • Front wheel and rear wheel drive steering control system of automobile
  • Front wheel and rear wheel drive steering control system of automobile

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Embodiment Construction

[0017] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0018] Such as figure 1 As shown, this embodiment includes: active steering electronic control unit 1, steering wheel steering angle sensor 2, vehicle speed sensor 3, yaw rate sensor 4, lateral acceleration sensor 5, front wheel steering motor servo control unit 6, rear wheel steering motor Servo control unit 7, steering wheel 14. The active steering electronic control unit is provided with a model tracking control module, and the model tracking control module adopts a feedforward control + feedback control structure. Active steering electronic control unit 1 is con...

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Abstract

The invention relates to a front wheel and rear wheel drive steering control system of an automobile in the technical field of automobile engineering. Steering wheel steering angle sensors are respectively connected with a drive turning electronic control unit; one end of each steering wheel steering angle sensor is connected with a steering wheel, and the other end of each steering wheel steering angle sensor is connected with a front wheel steering motor servo control unit; the front wheel steering motor servo control unit is respectively connected with a front wheel steering angle displacement sensor and a front wheel steering execution mechanism; a rear wheel steering motor servo control unit is respectively connected with a rear wheel steering angle displacement sensor and a rear wheel steering execution mechanism; the front wheel steering execution mechanism is connected with a front wheel, and the rear wheel steering execution mechanism is connected with a rear wheel. The invention combines front wheel drive steering and rear wheel drive steering, improves the lateral dynamic performance of the automobile, the driving characteristics of a driver and the operating stability of the automobile, changes a steering angle of the front wheel and the rear wheel in real time according to the drive working condition and a running parameter of the automobile and ensures that the automobile response follows the output response of a reference automobile model.

Description

technical field [0001] The invention relates to a control system in the technical field of automobile engineering, in particular to an active steering control system for front and rear wheels of an automobile. Background technique [0002] Automobile steering control system is mainly used to control the lateral movement of the automobile. In recent years, active steering systems, including front active steering (AFS) and rear active steering (ARS), have been applied in real vehicles. The front wheel active steering system provides a corrected front wheel steering angle according to the driving conditions of the vehicle, which can provide the driver with better control performance. Active rear wheel steering (also known as four-wheel steering, 4WS) controls the steering angle of the rear wheels, changes the lateral force of the rear wheels, and makes the rear wheels directly participate in the control of the lateral movement of the vehicle. However, either front-wheel activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B62D113/00B62D101/00B62D137/00
Inventor 李彬喻凡李聪
Owner SHANGHAI JIAO TONG UNIV
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