Novel Optimal Design Approach for Output-Feedback H∞ Control of Vehicle Active Seat-Suspension System

作者：Wei, Chunyu^*; Cai, Yue; Zhang, Ke; Wang, Zhan; Yu, Wenda

来源：Asian Journal of Control, 2020, 22(1): 411-422.

DOI：10.1002/asjc.1887

• Active seat-suspension system
• H-infinity optimal control
• LMI
• novel approach
• output-feedback

In this paper, the output-feedback control problem of a vehicle active seat-suspension system is investigated. A novel optimal design approach for an output-feedback H-infinity controller is proposed. The main objective of the controller is to minimize the seat vertical acceleration to improve vehicle ride comfort. First, the human body and the seat are considered in the modeling of a vehicle active suspension system, which makes the model more precise. Other constraints, such as tire deflection, suspension deflection and actuator saturation, are also considered. Then the output-feedback control strategy is adopted since some state variables, such as body acceleration and body deflection, are unavailable. A concise and effective approach for an output-feedback H-infinity optimal control is presented. The desired controller is obtained by solving the corresponding linear matrix inequalities (LMIs) and by the calculation of equations proposed in this paper. Finally, a numerical example is presented to show the effectiveness and advantages of the proposed controller design approach.

• 出版日期2020-1
• 单位沈阳建筑大学