Vibration Analysis and Control of Composite Sandwich Beams
碩士 === 國立成功大學 === 航空太空工程學系 === 88 === Although some investigations such as buckling, free vibration of composite sandwich beams can be found, it’s rarely seen the research about control and vibration suppression. In our study, we get the closed form solution of free vibration and forced v...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2000
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| Online Access: | http://ndltd.ncl.edu.tw/handle/23791402175914974436 |
| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系 === 88 === Although some investigations such as buckling, free vibration of composite sandwich beams can be found, it’s rarely seen the research about control and vibration suppression.
In our study, we get the closed form solution of free vibration and forced vibration equations and use the mathematical model to control the amplitude of vibration and achieve the vibration reduction in a short time.
This investigation uses smart composite beams with surface bonded piezoelectric sensors and actuators. The piezoelectric sensors can respond to structural vibration and generate output voltage due to the direct piezoelectric effect. On the other hand, the actuators can induce force and moment and control the system due to the converse piezoelectric effect. We use linear quadratic Gaussian algorithm to be the classical control method and form a feedback control system, and we choose Kalman estimator as an optimal state observer for a system contaminated with plant noise and measurement noise. The numerical simulation of the vibration control was done with the assist of the software MATLAB toolbox simulink.
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