Research of Control Algorithm for Antenna High Pointing Accuracy

With the development of the radio astronomy and the demanding for the angular resolution, the pointing error of the telescope receives a very strict limitation close to 1". In fact, it is the pulse torque that usually results in low frequency resonance exert to the antenna servo system, and the traditional PI(D) controller could not satisfy such high pointing accuracy requirements. In this paper, considering working condition of radio telescope and purpose of servo control, as well as the design principle of controller, a control algorithm based on the Linear Active Disturbance Rejection Controller (LADRC) is put to use. We applied this method to the position loop simulation of an antenna under the Simulink environment. The results prove that the LADRC control algorithm shows better dynamic property, higher control accuracy and stronger robustness.