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Fuzzy control method of automobile nonlinear active suspension system

A technology of active suspension and fuzzy control, which is applied in the direction of elastic suspension, suspension, vehicle components, etc., and can solve problems such as large amount of calculation

Inactive Publication Date: 2015-05-20
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scale factor and the quantization factor have mutual constraints, and the latter also faces the difficulty of a large amount of calculation

Method used

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  • Fuzzy control method of automobile nonlinear active suspension system
  • Fuzzy control method of automobile nonlinear active suspension system
  • Fuzzy control method of automobile nonlinear active suspension system

Examples

Experimental program
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Embodiment 1

[0051] Such as figure 1 As shown, the steps of the fuzzy control method of the automobile active suspension system in this embodiment are as follows:

[0052] A. Establish the active suspension system model, preset the state control expectation of the active suspension system, detect the suspension system state signal, calculate and obtain the control error signal according to the state control expectation, and define the fractional order differential of the control error signal;

[0053] Described step A comprises the following steps:

[0054] Create an active suspension system model:

[0055] The model of the active suspension system is

[0056] m 1 x · · 1 + c ...

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Abstract

The invention aims to provide a fuzzy control method of an automobile nonlinear active suspension system. The method includes the following steps that A, an active suspension system model is established, the state control expectation of the active suspension system is preset, and fractional order differential of a control error signal is defined; B, a fuzzy controller is designed, the control error signal and the fractional order differential of the control error signal are adopted for the fuzzy controller to serve as input variables, and the suspension control force serves as controller output; C, road impact load simulation is conducted on the active suspension system model under the action of the fuzzy controller, and the order parameter of the fractional order differential of the control error signal is determined according to a comprehensive performance index function; D, the control error signal and the fractional order differential of the control error signal serve as the input variables of the fuzzy controller, the output control force of the fuzzy controller is obtained, and control over the actual active suspension system is finished. By means of the fuzzy control method, the problems that by means of an existing technical scheme, scale factors and quantifying factors restrain one another, and the calculated quantity is large are solved, and the fuzzy control method has the advantages of being accurate in control and efficient in calculation.

Description

technical field [0001] The invention relates to the field of automobile suspension system control, in particular to a fuzzy control method for a non-linear active suspension system of a vehicle. Background technique [0002] Suspension system is one of the important parts of the car. The car suspension system refers to the parts that connect the elastic connection between the frame (or body) and the axle (or wheel). It is mainly composed of elastic elements, guiding devices and shock absorbers. Composed of three basic parts, the function of the car suspension is mainly to ease and suppress the vibration and impact caused by the uneven road surface, to ensure the comfort of the passengers and the integrity of the goods transported; in addition, in addition to transmitting the vertical force of the car, it also transmits other directions The force and moment, and ensure that there is a definite kinematic relationship between the wheel and the body (or frame), so that the car h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/018
Inventor 高远范健文王雨涛孔峰潘盛辉袁海英
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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