Independent modal variable structure fuzzy active vibration control of thin plates laminated with photostrictive actuators |
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| Authors: | He Rongbo Zheng Shijie |
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| Institution: | 1. Institute of Smart Materials and Structures, State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China ;School of Electrical Information, Anhui University of Technology, Ma'anshan 243002, China
2. Institute of Smart Materials and Structures, State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | Photostrictive actuators can produce photodeformation strains under illumination of ultraviolet lights. They can realize non-contact micro-actuation and vibration control for elastic plate structures. Considering the switching actuation and nonlinear dynamic characteristics of photostrictive actuators, a variable structure fuzzy active control scheme is presented to control the light intensity applied to the actuators. Firstly, independent modal vibration control equations of photoelectric laminated plates are established based on modal analysis techniques. Then, the optimal light switching function is derived to increase the range of sliding modal area, and the light intensity self-adjusting fuzzy active controller is designed. Meanwhile, a continuous function is applied to replace a sign function to reduce the variable structure control (VSC) chattering. Finally, numerical simulation is carried out, and simulation results indicate that the proposed control strategy provides better performance and control effect to plate actuation and control than velocity feedback control, and suppresses vibration effectively. |
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| Keywords: | Fuzzy active control Independent modal Photostrictive actuators Thin plate vibration Variable structure |
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