Real-time Modeling Method And Controller Design Platform For The Antenna Servo Control System

Large aperture radio telescopes are the crucial observation facility of astronomy. Thematerials science and structural mechanics development supports the structure of radiotelescopes develop into huge. In consequent, it is urgent to improve the pointing accuracy andperformance of disturbance rejection.The classic controller design theory, such as PI controller, is a choice to improve thepointing accuracy and performance of disturbance rejection. However, it is not enough whenthe requirement of improving the pointing accuracy and performance of disturbance rejectiongetting more rigorous, especially in the environment of wind-disturbance.This article presents a design method of output-feedback LQR controller basedon the theory of internal model and discusses the role of this method when applies to improvethe pointing accuracy and performance of disturbance rejection. The result of simulation andfield trial has proved it work.The premise of applying above method is to get an accurate system model. For that, thisarticle also presents a system identification method based on the pseudo-random signal andHANKLE matrix. We could get an accurate system model by the method.At last, this article introduces a software which could help us to design a controllereffectively.This experience can not only provide effective solution for the design of large apertureantenna control system, but also be an example for the servo control systems of the samekind.