Active shape adjustment of a cable-mesh reflector is a significant procedure to compensate the effects of a complicated space environment in orbit. In this paper, the active shape adjustment of a large cable-mesh reflector with actuators is addressed, and the dynamic input voltage profiles of actuators are estimated using a novel fast model predictive control method. The electromechanical coupling dynamic model of the cable-mesh reflector with piezoceramic (PZT) actuators is first established by using piezoelectric constitutive equations and Hamilton’s principle. For a certain shape distortion, the dynamic control voltage profiles are then obtained via the novel fast model predictive control method in which the structural dynamics model is reformulated as a novel explicit repression form to avoid the computations of matrix exponential. Additionally, some fast computation strategies based on the Newmark- β method are used to increase computational efficiency. Finally, a 30-meter diameter cable-mesh reflector is chosen as a numerical example, and the simulation results demonstrate that the proposed control algorithm provides a valid and efficient solution for the shape control of large cable-mesh reflectors.


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    Title :

    Active Shape Adjustment of Large Cable-Mesh Reflectors Using Novel Fast Model Predictive Control


    Contributors:
    Xun, Guangbin (author) / Peng, Haijun (author) / Wu, Shunan (author) / Wu, Zhigang (author)

    Published in:

    Publication date :

    2018-04-24




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown