Bond Graph Modeling Of Antenna Servo System And Analysis

With the increasing frequency of the large antenna, a higher tracking performance of servo system is required. The ability has become one of the crucial factors to limit the improvement of the large antenna performance that the model for large antenna derived accurately and efficiently and the simulation analysis implemented rapidly. The parametric modeling method of antenna servo system based on bond graph is proposed, for improving the modeling efficiency caused by the complex antenna servo system. For the typical elevation-azimuth antenna servo system, firstly, the bond graph model and the multi-body design model for servo mechanism are derived, analyzing their modeling and simulation efficiency. Secondly, achieving the parameters synchronization between design model and bond graph mode l, with introducing parameters synchronization mechanism. Furthermore, the simulation analysis are compared. Finally, the modeling method of servo control system based on bond graph is presented, the antenna servo mechanism driven by dual motor with a PID controller is analyzed, and then the effect mechanism on tracking performance caused by nonlinear component is analyzed. The bond graph models of friction observers and the backlash controller are design for friction and backlash, with which achieving the simulation of 7.3m test antenna. The results show that a seamless connection between design model and bond graph model is established with the parametric modeling method based on bond graph and parameters synchronization mechanism, improving the efficiency of modeling based on bond graph and the speed of simulation, which provides a technique for efficient modeling and rapid simulation of antenna servo system.