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Novel Optimal Design Approach for Output‐Feedback H ∞ Control of Vehicle Active Seat‐Suspension System
Author(s) -
Wei Chunyu,
Cai Yue,
Zhang Ke,
Wang Zhan,
Yu Wenda
Publication year - 2020
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.1887
Subject(s) - control theory (sociology) , active suspension , deflection (physics) , actuator , engineering , optimal control , control engineering , output feedback , suspension (topology) , full state feedback , computer science , control (management) , mathematics , mathematical optimization , physics , optics , artificial intelligence , homotopy , pure mathematics , electrical engineering
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 ∞ 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 ∞ 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.