Flexible Satellite Dynamic Modeling And Control System

Dynamic modeling and control system designing of a flexible satellite is a very important subject in the aerospace engineering. The dynamic model of the satellite with a flexible appendage has been studied in this thesis. Also,the techniques of the satellite earth acquisition and three-axis attitude stabilization of both the rigid satellite and the liquid-filled satellite have been researched. Besides,the control system design of the flexible satellite has been discussed. The main researches enclosed in this thesis are as follows:1. Based on the Newton's law of motion,the law of angular momentum and the variation principle,the dynamic model of the satellite with a flexible appendage has been researched. Using this dynamic model,the influences of the flexible solar-array's rotation have been discussed.2. Employing classical control techniques,the satellite earth acquisition has been studied and numerically simulated.3. The three-axis attitude stabilization of the rigid satellite has been studied. And,the influences of the external disturbances on the system stabilization have been studied.4. The three-axis attitude stabilization system of the flexible satellite has been studied,in which three basic vibration modes of the solar array have been considered.5. The dynamic system of the liquid-solid coupled satellite that is filled with an ideal liquid has been researched. The external disturbances and the liquid viscosity have been concerned in this study.The researches presented in this thesis are very useful to the flexible satellite attitude control. The control systems designed for the earth acquisition and for the attitude stabilization in this thesis have shown us their good dynamic properties.