CAJ | 학술논문

针对低轨道运行的编队卫星在非线性项作用下,伴随卫星运行的相对运动轨道发生偏移的情况,传统的李亚普诺夫方法能较好地控制轨道的初始偏移,使系统达到李亚普诺夫大范围一致稳定,但长期项误差震荡较大.本文提出了一种多回路结构的卫星轨道保持的控制方法,内回路选取使系统满足李亚普诺夫大范围一致稳定的控制律,外回路选取LQR线性状态调节器.此内外回路调节器能更好地抑制环绕卫星相对于基准轨道的误差漂移,更好地稳定编队队形.最后,数值仿真结果验证了此方法比传统的李亚普诺夫方法具有使编队更稳定的效果.
침대저궤도운행적편대위성재비선성항작용하,반수위성운행적상대운동궤도발생편이적정황,전통적리아보낙부방법능교호지공제궤도적초시편이,사계통체도리아보낙부대범위일치은정,단장기항오차진탕교대.본문제출료일충다회로결구적위성궤도보지적공제방법,내회로선취사계통만족리아보낙부대범위일치은정적공제률,외회로선취LQR선성상태조절기.차내외회로조절기능경호지억제배요위성상대우기준궤도적오차표이,경호지은정편대대형.최후,수치방진결과험증료차방법비전통적리아보낙부방법구유사편대경은정적효과.
As to satellite formation keeping moving on low orbit in the influence of nonlinearity, subordinative satellite orbit may drift related to reference orbit, initial error of orbit drift can be restrained by traditional Lyapunov controller, which makes the system stable, but the large shock error can't be removed. This thesis introduces a multi-looped structure for satellite formation keeping, the ruler which can satisfy Lyapunov stability is set in inner loop, an outer LQR state adjuster added on Lyapunov controller is introduced, this inner and outer loop controller can restrain subordinative satellite drift of orbit related to reference orbit, which can keep satellite formation stable. Finally, numerical results show that the two inner and outer loop controller can satisfy the actual require.