Intelligent control method for semi-active suspension system of automobile

A semi-active suspension and intelligent control technology, applied in the direction of suspension, elastic suspension, vehicle components, etc., can solve the problems that the control method cannot obtain satisfactory control effect, the structure of the semi-active suspension system is complicated, etc., and achieve the improvement Test success rate, comprehensive performance improvement, and the effect of improving smoothness

Inactive Publication Date: 2019-06-25
UNIV OF SCI & TECH LIAONING
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AI Technical Summary

Problems solved by technology

Correspondingly, the structure of the semi-active suspension system is relatively complex, and traditional control methods often cannot obtain satisfactory control effects

Method used

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  • Intelligent control method for semi-active suspension system of automobile
  • Intelligent control method for semi-active suspension system of automobile
  • Intelligent control method for semi-active suspension system of automobile

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Embodiment Construction

[0059] The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] An intelligent control method for an automobile semi-active suspension system, comprising the steps of:

[0061] Step 1. First, according to the characteristics of the automobile suspension system itself, the suspension performance evaluation index is clarified, and the random filtering white noise road surface input simulation model and simulation results described by the power spectral density in the time domain are established. Construct dynamic models of passive suspension and semi-active suspension of four-degree-of-freedom semi-vehicle.

[0062] Described step one specifically includes as follows:

[0063] 1. The vertical acceleration of the vehicle body, the dynamic stroke of the suspension and the dynamic load of the tires are used for quantitative evaluation, which are described from different angles and restraine...

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Abstract

Disclosed is an intelligent control method for a semi-active suspension system of an automobile. The method comprises the steps that a fuzzy controller is improved, a neural fuzzy inference system based on a Mamdani model is designed to serve as a controller, in combination with back propagation (BP) learning rules, fuzzy control rules are obtained through training, and by adopting a Simulink S-function, a corresponding fuzzy neural network is constructed to control a simulation model of the semi-active suspension system of the automobile. By analyzing a simulation test result of the model, itis shown that through the utilization of the model, the comprehensive performance of the suspension system of the automotive can be significantly improved. Under same experimental conditions, a simulation test is uniformly carried out on a passive suspension and a semi-active suspension system model based on fuzzy control and Mamdani fuzzy neural network control in the Simulink environment. Corresponding root mean square values of suspension performance evaluation indexes including the vertical acceleration of an automobile body, the dynamic travel of the suspension and the dynamic load of atire serve as output of a simulation module. By means of the intelligent control method, the performance of the semi-active suspension system can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of intelligent control of automobiles, in particular to an intelligent control method of an automobile semi-active suspension system. Background technique [0002] With the improvement of material level and cultural level, people have higher requirements for the comprehensive control performance of automobiles. A car is actually a complex multi-degree-of-freedom nonlinear system, and the internal subsystems have different natural frequencies. During the driving process, it is caused by various internal and external factors such as the speed of the vehicle, the direction of movement, the change of the external environment of wind, rain, and uneven road surfaces, and the imbalance of the suspension, engine, transmission system, and other components of the vehicle body. or local vibrations. Therefore, it is of great practical significance to adopt new technologies and methods to minimize the vibration generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/015B60G17/018G06F17/50
CPCY02T90/00
Inventor 刘洪宇
Owner UNIV OF SCI & TECH LIAONING
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