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Predictive Control Method for Automobile Electric Power Steering System

A technology of electric power steering and predictive control, which is applied in the direction of automatic steering control components, electric steering mechanisms, steering mechanisms, etc., and can solve problems such as rapid and changeable power assist currents that are not applicable

Active Publication Date: 2017-07-07
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
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Problems solved by technology

[0003] In order to solve the problem that the predictive control method of the existing automobile electric power steering system is not suitable for the application environment where the target assist current changes rapidly, the present invention provides a predictive control method for the electric power steering system of the automobile, which makes the generalized predictive control algorithm more adaptable For the fast and changing application environment of steering column assist electric power steering system

Method used

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  • Predictive Control Method for Automobile Electric Power Steering System
  • Predictive Control Method for Automobile Electric Power Steering System
  • Predictive Control Method for Automobile Electric Power Steering System

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Embodiment Construction

[0085] The present invention will be further described below with reference to the drawings and embodiments.

[0086] A predictive control method of automobile electric power steering system, such as figure 1 As shown, the generalized predictive control method is suitable for the predictive reference trajectory of the fast and changeable electric power steering operating conditions of the automobile. The armature current loop is responsible for the armature current to follow the expected reference current of the assist characteristic curve to achieve precise control of the assist torque, and the steering rod displacement loop is responsible for the actual steering rod displacement following the desired steering rod displacement to achieve the steering angle of the wheels. Precise control.

[0087] Step 1. Collect vehicle speed V and driver input torque T d , Steering wheel angle θ s , Booster motor armature current I a And steering rod displacement X r Wait for the signal.

[0088]...

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Abstract

The invention discloses a prediction control method of an electric power steering system of an automobile. The prediction control method is realized through two closed loop control of armature current prediction control and steering rod displacement prediction control, wherein an armature current ring is responsible for enabling an armature current to follow a reference current desired by a power characteristic curve so as to realize the accurate control on power torque; a steering rod displacement ring is responsible for enabling practical steering rod displacement to follow desired steering rod displacement so as to realize accurate control on the steering angle of a wheel.

Description

Technical field [0001] The invention relates to the technical field of automobile power steering, in particular to a predictive control method of an automobile electric power steering system. Background technique [0002] Automobile electric power steering system has gradually become the mainstream of automobile power steering system due to its energy saving and environmental protection, easy assembly, small space occupation and easy control. The electric power steering system can provide different assistance according to the change of the vehicle speed during the car steering process, thereby improving the stability of the car handling. The design of the control system is the key technology of the electric power steering system, and the electric power steering system has good control performance It is directly related to the handling and safety of the car. In 2012, Tan Guangxing, Song Chang, Wu Liejun, Ning Shenghua published a paper "Simulation of EPS predictive control strate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04B62D6/00B62D101/00B62D113/00B62D119/00
Inventor 张向文李靖许勇党选举伍锡如莫太平潘明任风华徐金龙
Owner GUILIN UNIV OF ELECTRONIC TECH
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