Synthesis of sliding control system for automotive suspension under kinematic constraints

Gennady Veselov,Aleksandr Sinicyn

doi:10.21595/jve.2021.22083

Abstract

This article is about the problem of control system synthesis for an active suspension system with not-ideal actuator under kinematic constrains. This paper investigates the influence of hysteresis and the dead zone in an actuator on efficiency of an active suspension system. To reduce the influence of hysteresis and the dead zone a method of synthesis of discontinuous control systems is proposed. The proposed discontinuous control system reduces the sensitivity of the system to disturbances caused by a non-ideal actuator. It enables a fourfold expansion of the distribution range where an active suspension is more effective than a passive suspension. This system also takes into account the nonlinear structure of the control object. The efficiency of the closed system is studied on a dynamic model constructed using the Simulink package.

Highlights

Today, there is a rise of research about possibilities of improving the comfort of passenger cars by means of an active suspension system
This work is devoted to the study of the influence of the dead zone and hysteresis in the actuators of active suspension systems
This paper proposes a synergetic law of discontinuous control of the active suspension system of the car

Summary

Introduction

There is a rise of research about possibilities of improving the comfort of passenger cars by means of an active suspension system. This work is devoted to the study of the influence of the dead zone and hysteresis in the actuators of active suspension systems. The problem of a non-ideal drive is very effectively solved by using perturbation observers, for the correct operation of the observer, a perturbation model and the exact values of its parameters are required. To get these values is considerably difficult. As it was determined earlier, the control object is essentially nonlinear, when synthesizing control laws, it is better to use the synergetic control theory (SCT) [11]. The distinctive features of the proposed sliding control system are: – any evaluation or an observer of uncertain parameters or road profile is not required; – no prior information about the shape, type, or location of the dead zone or hysteresis is required

Object control model

Synthesis of a hierarchical discontinuous control system

Stability research

Closed system research

Conclusions