AAS 98-124

THE HIGH ACCURACY DIGITAL SERVO CONTROL AND DATA PROCESSING SYSTEM OF THE ANTENNA PLATFORM IN THE SATELLITE ORBIT SIMULATION LABORATORY

Yan, Jie - Northwestern Polytechnical University, P. R. China

Abstract

The transmit and receive antenna on the satellite should be tested before launching to determine its performances. The earth-base satellite space orbit survey and control laboratory (SSOSCL) is designed to deal with the antenna performances tests, which is generally composed of an isolated microwave room, antenna platform, control system, 3-D orbit system and a computer system by which we can design and control the test. In this paper, we discuss the composition of the SSOSCL (size: 4 m , 4 m, 10m) control system at first, then give the block diagram for the system. A PID type control algorithm is developed, which is different from the general PID algorithm. The main controlled variable in the suggested algorithm is the speed, and the position variable is introduced to correct the orbit error. The suggested PID algorithm has the advantage that it makes running orbits more smooth and accurate. The paper describes the design of the new PID control algorithm in detail, discusses its real-time calculate problems in the computer, and shows some results obtained with the suggested control algorithm.

Back