Abstract
Photostrictive actuator, which can produce photodeformation strains under the activation of ultraviolet lights, is a new promising non-contact photoactuation technique for active vibration control of flexible structures. Generally, the membrane control action plays a major role in vibration control of flexible thin shell structures. However, it is unfortunate that the existing photostrictive actuator configuration can not induce negative membrane control forces. In this paper, a novel multi-layer actuator configuration is first presented to remedy this deficiency, followed by presenting the photostrictive/shell coupling equations of thin cylindrical shells laminated with the proposed multi-layer actuator configuration. Moreover, considering the time-variant and nonlinear dynamic characteristics of photostrictive actuator, variable structure self-adjusting parameter fuzzy active controller is explored to overcome disadvantages of conventional control schemes, in which off-line fuzzy control table is adopted. The optimal switching surface is derived to increase the range of sliding mode to facilitate vibration suppression. A continuous function is used to replace the sign function for reducing the variable structure control chattering. Finally, two case studies are carried out to evaluate the effectiveness of the proposed actuator configuration and the control scheme. Numerical simulation results demonstrate that the proposed actuator configuration is effective in shell actuation and control. It is also suggested that the proposed control strategy could give better control responses than the proportional velocity feedback.
Highlights
Over the last decades, smart structures with distributed sensors and actuators designed by various smart materials, such as piezoelectric, electrostrictive, and magnetostrictive actuators, etc. have been extensively studied and evaluated [1,2,3]
He et al / Independent modal variable structure fuzzy active vibration control of cylindrical thin shells photostrictive actuators have been proposed in place of the conventional electromechanical actuators [4,5,6,7,8,9,10,11]
This paper presents an investigation into variable structure fuzzy active vibration control of a supported cylindrical thin shell laminated with the novel multi-layer actuator configuration
Summary
Smart structures with distributed sensors and actuators designed by various smart materials, such as piezoelectric, electrostrictive, and magnetostrictive actuators, etc. have been extensively studied and evaluated [1,2,3]. He et al / Independent modal variable structure fuzzy active vibration control of cylindrical thin shells photostrictive actuators have been proposed in place of the conventional electromechanical actuators [4,5,6,7,8,9,10,11]. This paper presents an investigation into variable structure fuzzy active vibration control of a supported cylindrical thin shell laminated with the novel multi-layer actuator configuration. The remainder of this paper is organized as follows: Section 2 proposes a novel multi-layer actuator configuration and establishes the independent mode vibration control equations of photoelectric laminated cylindrical shell. Modeling of photoelectric laminated cylindrical shell based on the proposed novel multi-layer actuators configuration
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