Active Control of Free Paraboloidal Membrane Shells Using Photostrictive Actuators |
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| Authors: | WANG Xinjie YUE Honghao DENG Zongquan |
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| Institution: | State Key Laboratory of Robotics and Systems, Harbin Institute of Technology, Harbin 150080, China;Research Center of Aerospace Mechanism and Control, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The paraboloidal membrane shell with free boundary condition is actively controlled using photostrictive actuators which can
provide contactless actuation under the illumination of ultraviolet light. The governing equations of the paraboloidal shell
laminated with paired photostrictive actuators are established based on membrane approximation. The modal control actions
of meridional/circumferential actuators are respectively formulated and evaluated by case studies. Constant light intensity
related to the velocity of the shell is adopted, and then the governing equations are written in a closed-loop form which
can be solved with Newmark-β method. Considering the multi-field coupling behavior of photostrictive actuators, time histories of transverse displacement
and control light intensity are simulated and evaluated. The results show that photostrictive actuators can effectively control
the vibration of the paraboloidal membrane shell, and the photostrictive actuators oriented along circumferential direction
can give better control effect than photostrictive actuators placed along the meridional direction. |
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| Keywords: | photostrictive actuator paraboloidal shell active control membrane approximation |
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