Improved sliding mode vibration control for a stiffened plate based on local strain compensation

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (6) : 176-180.

DU Fei1,2,3,MA Tianbing1,2,3,LIU Jian3,LUO Zhi3

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Abstract

In the active vibration control of a stiffened plate, the sensing piece and the actuation piece are in a relative position pasting form.Experiments show that there is local strain effect in this way, which will lead to the attenuation of vibration control effect and even the divergence of control.Aiming at this, a local strain compensation scheme was constructed and an improved power law approaching sliding mode control algorithm based on local strain compensation was designed.The vibration mode of the stiffened plate was taken as the control object.An active vibration control experiment of the stiffened plate was carried out on the NI-CompactRIO 9024 platform.The experimental results show that the vibration suppression effect of the improved power law approaching sliding mode control algorithm based on local strain compensation could reach 13.16 dB for the first mode of the stiffened plate, which is 2.57 dB higher than the 10.59 dB of the uncompensated improved power law approaching sliding mode algorithm.

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vibration control / local strain / improved sliding mode / stiffened plate

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DU Fei1,2,3,MA Tianbing1,2,3,LIU Jian3,LUO Zhi3. Improved sliding mode vibration control for a stiffened plate based on local strain compensation[J]. Journal of Vibration and Shock, 2020, 39(6): 176-180

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