A new method of static output-feedback H controller design for 5 DOF vehicle active suspension system

Technical Paper
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Abstract

In this paper, the static output-feedback control problem of 5 degrees of freedom (DOF) vehicle active suspension systems is investigated. A novel H optimal controller is designed for this system to improve simultaneously ride comfort and handling ability. The actuator saturation, suspension deflection and tire deflection are considered in the controller synthesis. To minimize the seat acceleration, taking into account the vehicle body vertical acceleration and pitch acceleration, a new method for designing and solving static output-feedback H optimal controllers is proposed. First of all, a 5 DOF half-vehicle active suspension including active seat system model is presented. Then a direct, easily solved and effective method for static output-feedback H optimal control is presented. The controller is obtained by solving linear matrix inequality optimization problem and direct computation of related matrices. Finally, a numerical example is presented. The simulation results show that the controller proposed can achieve better performance compared with state feedback H optimal controller and the validity of the design method is verified.

Keywords

New method Static output-feedback H control 5 DOF vehicle active suspension system 

Notes

Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant no. 51375317), General Project for Scientific Research of Liaoning Provincial Education Department, China (Grant no. L2014236), and Liaoning Province Science and Technology Innovation special plan (Grant no. 201506003).

Compliance with ethical standards

Conflict of interest

The corresponding author Chunyu Wei and other co-authors have no conflict of interest. All authors and any other organizations or individuals have no conflicts of interest, too. All authors solemnly promise here. Chunyu Wei, Ke Zhang, Yue Cai, Zhan Wang, Wenda Yu.

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringShenyang Jianzhu UniversityShenyangChina

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