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Adaptive Structural Control Experiment Using Recursive System Identification

Department of Aerospace Engineering, The Institute of Advanced Aerospace Technology, Seoul National University, Seoul 151-742, Koreaydkim{at}snu.ac.kr

Seungyong Hyung

Department of Aerospace Engineering, The Institute of Advanced Aerospace Technology, Seoul National University, Seoul 151-742, Korea

Jinyoung Suk

Department of Aerospace Engineering, Chungnam National University, Daejun 305-764, Korea

This paper presents a real time adaptive active control system for vibration suppression of flexible structural systems with piezoelectric actuators–sensors. The system considered in this paper is a plate model with segmented piezoelectric actuators. An input–output model is developed for the identification of the systems, and on-line recursive identification scheme that is adequate to the proposed input–output model is used. An adaptive control method combined with model following control scheme is proposed for vibration suppression. An estimator is considered to exclude the effect of noise from the output signals. The proposed control strategy is successful in improving the dynamic characteristics of the structural systems. The experiments demonstrated the benefit of the proposed algorithm.

Key Words: vibration suppression • system identification • adaptive control reconfiguration • piezoelectric actuator

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