한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)
- 제15권11호
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- Pages.172-179
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- 1998
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
압전 가진기와 압전 센서를 부착한 평판의 시스템 식별
System Identification of a Plate with Piezoelectric Actuators and Sensors
초록
This paper proposes an identification method for modes of a thin plate where multiple actuators and sensors are bonded. When a natural frequency of a mode is decoupled from all other natural frequencies, the mode can be identified separatedly with a bandpass filter. Since a thin plate has resonant peaks at natural frequencies, the bandpass filter can be designed to extract the signal of the mode to be identified. Parameters of the second order linear differential equation of the mode can be obtained to apply the Least square method to the extract the modal signal. The proposed identification method is applied to an all-clamped plate with two pairs of piezoelectric actuators and sensors. The outputs of the identified model match with the experimental data well.
키워드