Multi-objective H2/H control of uncertain active suspension systems with interval time-varying delay

Author:

Ma Xinbo1,Wong Pak Kin2ORCID,Li Wenfeng3,Zhao Jing2ORCID,Ghadikolaei Meisam Ahmadi2ORCID,Xie Zhengchao3

Affiliation:

1. School of Intelligent Manufacturing, Nanyang Institute of Technology, Nanyang, China

2. Department of Electromechanical Engineering, University of Macau, Taipa, China

3. School of Mechanical Engineering and Automation, South China University of Technology, Guangzhou, China

Abstract

The vehicle active suspension has been widely used as it could effectively improve the vehicle ride comfort. To solve the issues of actuator uncertainty and time delay existing in the active suspension system, a multi-objective non-fragile [Formula: see text] control algorithm is proposed in this work. First, to effectively describe the vehicle suspension dynamics, a quarter-car suspension model is constructed first in this study. Second, aiming at improving the ride quality and guarantee the hard constraints of the suspension system, a multi-objective H2/ H performance index is proposed. Subsequently, the issues of external disturbances, actuator uncertainty and delay are considered in the design process of the suspension controller. Then, a multi-objective non-fragile control algorithm is proposed based on an effective Lyapunov functional. The control gain can be obtained by solving a convex optimization problem in terms of linear matrix inequalities. Finally, numerical simulations are implemented on MATLAB/Simulink platform to show the robustness and superiority of the proposed controller. Experiments are implemented on a quarter-car test rig to validate the practical performance of the designed controller.

Funder

National Natural Science Foundation of China

Key Specialized Research & Development and Promotion Project

Doctoral research start-up funding project of Nanyang Institute of Technology

natural science foundation of guangdong province

universidade de macau

Publisher

SAGE Publications

Subject

Mechanical Engineering,Control and Systems Engineering

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