Affiliations: State Key Laboratory of Mechanics and Control of
Mechanical Structures, Nanjing University of Aeronautics and Astronautic,
Nanjing, Jiangsu, China | School of Electrical Information, Anhui University of
Technology, Maanshan, Anhui, China | School of Mechanical and Electrical Engineering,
Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu,
China
Note: [] Corresponding author: S.J. Zheng, State Key Laboratory of
Mechanics and Control of Mechanical Structures, Nanjing University of
Aeronautics and Astronautic, Nanjing 210016, Jiangsu, China. E-mail:
sjzheng@nuaa.edu.cn
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.
Keywords: Photostrictive actuator, multi-layer actuator configuration, cylindrical thin shells, variable structure, fuzzy active vibration control
