压电智能结构振动系统未知扰动估计

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Abstract Vibration is easily caused by external disturbances, which may lead to fatigue damage and reduce the service life.However, in many practical engineering applications, disturbances are unknown or difficult to be measured directly.In this paper, a proportional-integral (PI) observer based on the Kalman filter was developed for smart structures using multiple distributed piezoelectric sensors, and the data of estimated disturbance with different positions were obtained through simulation test.The simulation results show that the proposed method has better dynamic performance for the external unknown disturbances with measurement noises compared to traditional proportional-integral observers.

Key words： disturbance estimation Kalman filter proportional integral observer piezoelectric sensors

Received: 28 November 2017 Published: 15 August 2019

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	Articles by authors
	WU Binyi1
	QIN Xiansheng1
	ZHANG Shunqi2
	WANG Zhanxi1
	BAI Jing1
	LI Jing1

Cite this article:

WU Binyi1,QIN Xiansheng1,ZHANG Shunqi2, et al. Unknown disturbance estimation for a vibration system of piezoelectric smart structures[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(16): 37-41.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I16/37

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