Research on variable universe fuzzy PID control for semi-active suspension with CDC dampers based on dynamic adjustment functions

Abstract

The vehicle suspension system is a complex system with multiple variables, nonlinearity and time-varying characteristics, and the traditional variable universe fuzzy PID control algorithm has the problems of over-reliance on expert experience and non-adaptive adjustment of the contracting-expanding factor parameters, which make it difficult to achieve a better control effect. In this paper, the system error e(t) and its change rate ec(t) are introduced into the contracting-expanding factor as dynamic parameters to realize the adaptive adjustment of the contracting-expanding factor parameters, and propose a variable universe fuzzy PID control based on dynamic adjustment functions (VUFP-DAF), which uses the real-time contracting-expanding factor to realize the adaptive adjustment of the fuzzy universe, so as to improve the ride comfort of vehicles. The research results show that the proposed VUFP-DAF has strong adaptability and can effectively improve the ride comfort and handling stability of vehicles under different speeds and road excitations, providing a certain technical basis for the development of the semi-active suspension system.

Design and study of mine silo drainage method based on fuzzy control and Avoiding Peak Filling Valley strategy

“…With the development of intelligent control technology and sensor technology, the mine drainage method develops in the direction of intelligence, in which fuzzy control provides a theoretical basis for the mine drainage system to realize intelligent control and many scholars have done research on such issues and achieved fruitful results. The former Soviet Union design institute 16 , 17 developed a system software package according to the complex underground environment of the coal mine, the amount of water influx and mine drainage parameters, and has certain computer-aided functions which can optimize the operation of the drainage system management. This research provided a reference for a large number of subsequent studies, but with the development of technology, this system program cumbersome, low degree of automation, versatility and other shortcomings slowly exposed, no longer suitable for modern mining production.…”