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http://dx.doi.org/10.5050/KSNVE.2011.21.10.940

Active Vibration Control of Plates Using Filtered Velocity Feedback Controllers  

Shin, Chang-Joo (부산대학교 대학원 기계공학부)
Hong, Chin-Suk (울산과학대학 디지털기계학부)
Jeong, Weui-Bong (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.21, no.10, 2011 , pp. 940-950 More about this Journal
Abstract
This paper reports a filtered velocity feedback(FVF) controller, which is an alternative to direct velocity feedback(DVFB) controller. The instability problems at high frequencies due to non-collocated sensor/actuator configuration with the DVFB can be alleviated by the proposed FVF controller. The FVF controller is designed to filter out the unstable high frequency response. The dynamics of a clamped plate under forces and moments and the FVF controllers are formulated. The stability of the control system and performance are investigated with the open loop transfer function(OLTF). It is found that the FVF controller has a higher gain margin than the corresponding DVFB controller owing to the rapid roll-off behavior at high frequencies. Although the gain margin cannot be fully utilized because of the enhancement at the high frequencies, the vibration at the modes lower than the tuning frequency is well controlled. This performance of the FVF controller is shown to be improved from that of the DVFB controller. It is, however, noted that the stability around the tuning frequency is very sensitive so that the enhancement in vibration level should be followed. The reduction performance at low frequencies using the FVF controller should be compromised with the enhancement in the vibration at high frequencies while designing the controller.
Keywords
Active Vibration Control; FVF(filtered velocity feedback); Open Loop Transfer Function;
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Times Cited By KSCI : 4  (Citation Analysis)
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