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Fuzzy control method of gray prediction of magneto-rheological fluid damper

A gray prediction model, the technology of magnetorheological fluids, applied in vibration suppression adjustment, non-rotational vibration suppression, etc., can solve application limitations, nonlinearity of magnetorheological fluid shock absorbers, etc., to eliminate nonlinearity and time delay. performance, improve vibration reduction, solve nonlinear and time-delay problems

Inactive Publication Date: 2012-01-18
ZHONGBEI UNIV
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Problems solved by technology

Since magnetorheological fluid shock absorbers are usually nonlinear and time-delayed, their applications are limited

Method used

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  • Fuzzy control method of gray prediction of magneto-rheological fluid damper

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Embodiment Construction

[0025] The gray predictive fuzzy control method of the magnetorheological fluid shock absorber, the method is realized by the following steps (such as figure 1 shown):

[0026] (1) Use the acceleration sensor to collect vertical vibration signals online;

[0027] (2) Take the collected vertical vibration signal as the original sequence of the gray prediction model, and use the gray prediction model to obtain the prediction deviation and its variation;

[0028] (3) The prediction deviation and its variation obtained by using the gray prediction model are used as the input of the fuzzy controller;

[0029] (4) The fuzzy controller calculates the current required by the magneto-rheological fluid shock absorber according to the prediction deviation and its variation, and outputs the current to control the damping force of the magnetorheological fluid shock absorber.

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Abstract

The invention relates to a vibration reduction technology of a heavy vehicle, in particular to a fuzzy control method of the gray prediction of a magneto-rheological fluid damper. The method solves the problems of nonlinearity and time lag of the magneto-rheological fluid damper. The method comprises the following steps of: (1) collecting a vertical vibrating signal on line by using an acceleration transducer; (2) working out a prediction error and the variable quantity of the prediction error by using a gray prediction model; (3) taking the prediction error and the variable quantity of the prediction error as the input quantity of a fuzzy controller; and (4) figuring out the size of electric currents required for the magneto-rheological fluid damper by using the fuzzy controller according to the prediction error and the variable quantity of the prediction error. The invention solves the problem of nonlinearity and time lag of the magneto-rheological fluid damper, can be conveniently applied to a semi-active suspension system of the heavy vehicle and can realize the real time control on the semi-active suspension system.

Description

technical field [0001] The invention relates to a vibration reduction technology of a truck, in particular to a gray prediction fuzzy control method for a magnetorheological fluid shock absorber. Background technique [0002] At present, the suspension system of trucks is mainly divided into passive suspension system and semi-active suspension system. Among them, the passive suspension system uses elastic elements such as leaf springs and damping elements to alleviate the vibration generated by the road surface when the car is running. Since the vibration characteristics of the system are fixed, it is difficult to take into account both ride comfort and operational stability. sex. The structural parameters of the semi-active suspension system (such as damping, spring stiffness, etc.) are adjustable, so they can better meet the requirements of vehicle driving. The magnetorheological fluid shock absorber is a kind of damper to realize the semi-active suspension system. Its w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/53
Inventor 杨臻方炜韩晓明郭薇薇李强解永红
Owner ZHONGBEI UNIV
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