A novel adaptive actuator failure compensation scheme based on multi-design integration for half-car active suspension system

Xuelian Yao,Yi Yang,Mingming Su

doi:10.1177/1687814019894097

Abstract

A new actuator failure compensation scheme in the presence of actuator failures with multi-uncertainties is proposed for half-car active suspension systems based on multi-design integration. A parameterized function has been introduced to denote the multiple failures occurred in the front and rear actuators. An effective feedback controller is designed to obtain asymptotic tracking and closed-loop system stability by employing backstepping technique. Based on the desired controller, multiple adaptive control signals are designed corresponding to each possible failure case. By introducing failure indicator functions and integrating these control signals, a composite controller is constructed to handle all failure patterns, which ensures both pitch and vertical motions of car body to stabilize and track the desired signals. Finally, simulation is conducted to verify the effectiveness of the controller proposed in this study.

Highlights

More and more researchers attach great importance to the study of improving the dynamic characteristics of vehicle ride comfort and handling performance.[1,2,3] Achieving acceptable performance in these measures is critical to enable automotive manufacturers to meet the requirements for ensuring passengers health and safety and so on
This article developed a novel fault-tolerant controlling approach for active suspension systems to handle actuator failures with multi-uncertainties, which has a composite structure, it means that a single adaptive controller is utilized to accommodate multiple uncertainties of actuator failures
The result of the system with uncertain time-varying failure between the adaptive backstepping control method and the new fault tolerant control (FTC) approach is presented in Figures 5–7, which illustrates that the proposed method can achieve satisfied performance in the active suspension system with different failure cases

Summary

Introduction

More and more researchers attach great importance to the study of improving the dynamic characteristics of vehicle ride comfort and handling performance.[1,2,3] Achieving acceptable performance in these measures is critical to enable automotive manufacturers to meet the requirements for ensuring passengers health and safety and so on. This article presents a novel direct adaptive controlling method for addressing the tracking control problem for active suspension systems having uncertain actuator failures In this proposed algorithm, multiple controllers designed for individual failure cases are incorporated, as well as an integration mechanism. This article developed a novel fault-tolerant controlling approach for active suspension systems to handle actuator failures with multi-uncertainties, which has a composite structure, it means that a single adaptive controller is utilized to accommodate multiple uncertainties of actuator failures In this approach, explicit fault detection is not needed, as multiple types of failures are estimated by using a complete controller parametrization, compared with fault diagnosis designs proposed in Yetendje et al.[28] and Rizvi et al.[29].

I a I u1

À br2 mr

Conclusion