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| Active control of structural vibration by piezoelectric stack actuators |
| NIU Jun-chuan, ZHAO Guo-qun, HU Xia-xia |
| School of Mechanical Engineering, Shandong University, Jinan 250061, China; School of Material Science and Engineering, Shandong University, Jinan 250061, China; College of Mechanical and Electrical Engineering, Zhejiang University of Technology, Hangzhou 310014, China |
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Abstract This paper presents a general analytical model of flexible isolation system for application to the installation of high-speed machines and lightweight structures. Piezoelectric stack actuators are employed in the model to achieve vibration control of flexible structures, and dynamic characteristics are also investigated. Mobility technique is used to derive the governing equations of the system. The power flow transmitted into the foundation is solved and considered as a cost function to achieve optimal control of vibration isolation. Some numerical simulations revealed that the analytical model is effective as piezoelectric stack actuators can achieve substantial vibration attenuation by selecting proper value of the input voltage.
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Received: 20 January 2005
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