基于相平面法的数字式卫星姿控喷气系统设计

In this paper, the jet attitude control problem of digital satellite based on phase-plane method is studied. The mathematical model is founded to design control system. According to the control requirements of different attitude deviation, the regions of the phase-plane are designed in detail using time optimal and time-fuel optimal theory. Compared with analog control law, it is proved that within required accuracy range the digital control law can form the longest period one-sided limit cycle against the effection of the variable disturbance. So the system is robust and adaptive to a certain extent. A kind of estimator is given in this article to solve the problem that the disturbance angular acceleration is measureless, and the simulation results show that high accuracy disturbance acceleration is achieved with this estimator. Finally, numerial results for three-axis stabilized satellite are provided to demonstrate the effectiveness of the control algorithm.