Independent modal variable structure fuzzy active vibration control of cylindrical thin shells laminated with photostrictive actuators

HE Rongbo; ZHENG Shijie; WANG Hongtao

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Independent modal variable structure fuzzy active vibration control of cylindrical thin shells laminated with photostrictive actuators

HE Rongbo 1 #,ZHENG Shijie 2 *,WANG Hongtao 1

1.Institute of Smart materials and Structures, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics And Astronautic,210016

2.School of Electrical Information, Anhui University of Technology,243002

*Correspondence author

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Funding: the Chinese Natural Science Foundation （No.No. 10872090, 50830201), Nanjing University of Aeronautics and Astronautics Special Research Projects）

Opened online:15 March 2012

Accepted by: none

Citation: HE Rongbo,ZHENG Shijie,WANG Hongtao.Independent modal variable structure fuzzy active vibration control of cylindrical thin shells laminated with photostrictive actuators[OL]. [15 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470780

This paper presents an investigation into sliding mode fuzzy active vibration control of cylindrical thin shells laminated with photostrictive actuators. A phenomenon that the photostrictive actuators can not induce negative membrane control forces was pointed out and a novel multi-layer actuator configuration was presented to remedy this deficiency. Due to the switching actuation and nonlinear dynamic characteristics of photostrictive actuator, sliding mode fuzzy active controller was proposed to suppress the vibration. In order to further increase the range of sliding mode to facilitate vibration suppression, the function of the optimal switching surface was derived. Continuous function was applied to replace sign function to reduce the variable structure control chattering. Numerical simulation results demonstrated that the proposed actuator configuration provided better performance and effect to shell actuation and control. It was also suggested that the proposed control strategy could effectively suppresses vibration.

Keywords:photostrictive actuator; cylindrical thin shell; variable structure; fuzzy active vibration control

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