基于STK的编队飞行队形保持控制及仿真

Formation Control and Simulation with STK for Formation Flying

小卫星编队飞行是近年来各个国家航天领域研究的重点,而编队飞行队形的保持控制是其中的一个重要方面。主要介绍了一种基于STK的编队飞行队形保持控制仿真实现方法。控制算法采用了基于Hill方程动力学模型的线性二次型最优控制。利用STK中的嵌入式脚本(Plug-in),将由控制算法得到的队形保持控制力,添加到STK轨道计算的力学模型中,从而进行队形保持控制。通过对有一定初始构型偏差的卫星编队飞行进行仿真,控制结果表明:控制后的卫星编队队形误差可控制在1m之内,最高精度可达到厘米级。从而验证了此控制方法及仿真实现方法的可行性。

Recent years satellihes formation flying has been one of the most important astronautical fields for many countries, of which formation keeping control is one important part. A simulation method based on STK for the satellites formation keeping control is introduced. Control strategy using linear - quadratic regulator techniques is presented here where the relative motion model is based on Hill equations. The forces for formation keeping control calculated thought the control strategy are added into the STK orbit propagator, which is realized through the STK plug - in. So the formation keeping control is finished. One formation flying with certain initial deviation is simulated. The results show that after controlling, the error for the formation can be limited to one meter, and the highest precision can be centimeters. The feasibility of the control strategy and simulation method is proved.