Adaptive fuzzy predictive tracking of feed supporting system for the square kilometre array

In view of the characteristics of time-varying and large delay constant of cable-feed supporting system for next generation large radio telescope-Square Kilometer Array (SKA), the decentralized control strategy and an adaptive fuzzy predictive controller (AFPC) are proposed to realize the feed coarse tracking. The AFPC consists of a fuzzy predictor and a fuzzy predictive controller, and the on-line correction of which is carried out using BP algorithm. The simulation results have shown that the tracking precision is much favorable to guarantee the coarse tracking precision requirement, which have laid a solid base for the engineering implementation of the high precision requirement of the feed tracking control for the SKA.