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

Sensors

Tianhong Yan¹  Xinsheng Xu¹  Jianqiang Han¹  Rongming Lin²  Bingfeng Ju³ 

[1] College of Mechanical & Electrical Engineering, China Jiliang University, Xueyuan Road, Xiasha High-Edu Park, Hangzhou 310018, Zhejiang, China; E-Mails:;Center for Mechanics of Micro-Systems, Nanyang Technological University, 639798, Singapore; E-Mail:;State Key Laboratory of Fluid Power and Mechantronic Systems, Zhejiang University, Yuquan Road, Hangzhou 310027, Zhejiang, China; E-Mail:

关键词: smart structure;    control mechanism;    PZT actuator;    disk flutter/vibration;    optimal feedback control;   

DOI  :  10.3390/s110303094

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.