11 April 2017 Optimization design of an adaptive CFRC reflector for high order wave-front error control
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Abstract
The trend in future space high precision reflectors is going towards large aperture, lightweight and actively controlled deformable antennas. An adaptive shape control system for a Carbon Fiber Reinforced Composite (CFRC) reflector is conducted by Piezoelectric Ceramic Transducer (PZT) actuators. This adaptive shape control system has been shown to effectively mitigate common low order wave-front error, but it is inevitably plagued by high order wave-front error control. In order to improve the controllability of the adaptive CFRC reflector control system for high order wave-front error, the design of adaptive CFRC reflector requires optimizing further. According to numerical and experimental results, the print-through error induced by manufacturing and PZT actuators actuation is a type of predominant high order wave-front error. This paper describes a design which some secondary rib elements are embedded within the triangular cells of the primary ribs. These small secondary ribs are designed to support the reflector surface’s weak region. Controllability of this new adaptive CFRC reflector control system with small secondary ribs is evaluated by generalized Zernike functions. This new design scheme can reduce high order residual error and suppress the high order wave-front error such as print-through error. Finally, design parameters of the adaptive CFRC reflector control system with small secondary ribs, such as primary rib height, secondary rib height, cut-out height of primary rib, are optimized.
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Lan Lan, Lan Lan, Houfei Fang, Houfei Fang, Ke Wu, Ke Wu, Shuidong Jiang, Shuidong Jiang, Yang Zhou, Yang Zhou, } "Optimization design of an adaptive CFRC reflector for high order wave-front error control", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 1016427 (11 April 2017); doi: 10.1117/12.2258634; https://doi.org/10.1117/12.2258634
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