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Sensors 2011, 11(3), 3094-3116; doi:10.3390/s110303094

Optimization of Sensing and Feedback Control for Vibration/Flutter of Rotating Disk by PZT Actuators via Air Coupled Pressure

1
College of Mechanical & Electrical Engineering, China Jiliang University, Xueyuan Road, Xiasha High-Edu Park, Hangzhou 310018, Zhejiang, China
2
State Key Laboratory of Fluid Power and Mechantronic Systems, Zhejiang University, Yuquan Road, Hangzhou 310027, Zhejiang, China
3
State Key Lab of Digital Maufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
4
Center for Mechanics of Micro-Systems, Nanyang Technological University, 639798, Singapore
*
Author to whom correspondence should be addressed.
Received: 11 February 2011 / Revised: 1 March 2011 / Accepted: 3 March 2011 / Published: 10 March 2011
(This article belongs to the Section Physical Sensors)
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Abstract

In this paper, a feedback control mechanism and its optimization for rotating disk vibration/flutter via changes of air-coupled pressure generated using piezoelectric patch actuators are studied. A thin disk rotates in an enclosure, which is equipped with a feedback control loop consisting of a micro-sensor, a signal processor, a power amplifier, and several piezoelectric (PZT) actuator patches distributed on the cover of the enclosure. The actuator patches are mounted on the inner or the outer surfaces of the enclosure to produce necessary control force required through the airflow around the disk. The control mechanism for rotating disk flutter using enclosure surfaces bonded with sensors and piezoelectric actuators is thoroughly studied through analytical simulations. The sensor output is used to determine the amount of input to the actuator for controlling the response of the disk in a closed loop configuration. The dynamic stability of the disk-enclosure system, together with the feedback control loop, is analyzed as a complex eigenvalue problem, which is solved using Galerkin’s discretization procedure. The results show that the disk flutter can be reduced effectively with proper configurations of the control gain and the phase shift through the actuations of PZT patches. The effectiveness of different feedback control methods in altering system characteristics and system response has been investigated. The control capability, in terms of control gain, phase shift, and especially the physical configuration of actuator patches, are also evaluated by calculating the complex eigenvalues and the maximum displacement produced by the actuators. To achieve a optimal control performance, sizes, positions and shapes of PZT patches used need to be optimized and such optimization has been achieved through numerical simulations. View Full-Text
Keywords: smart structure; control mechanism; PZT actuator; disk flutter/vibration; optimal feedback control smart structure; control mechanism; PZT actuator; disk flutter/vibration; optimal feedback control
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yan, T.; Xu, X.; Han, J.; Lin, R.; Ju, B.; Li, Q. Optimization of Sensing and Feedback Control for Vibration/Flutter of Rotating Disk by PZT Actuators via Air Coupled Pressure. Sensors 2011, 11, 3094-3116.

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