基于交会模式的月球大椭圆轨道编队飞行控制

两颗微卫星进入环月大椭圆轨道后,在地面测控支持下,通过执行若干次轨道机动,最终实现从相距上千或上万km至相距1～10 km范围变化的环月轨道编队飞行。针对月球大椭圆轨道,基于多脉冲交会控制模式,设计了交会点满足编队飞行状态的轨道控制策略,采用线性制导方法迭代计算精确轨道控制参数;设计了顺序优化的5脉冲控制策略,对轨道平面、拱线、形状和相位等轨道全要素进行控制,通过远距离接近、中距离调整和近距离捕获的渐进式分段控制,在月球大椭圆轨道差异较大条件下,相对运动轨迹渐进稳定,最终实现近距离编队。

Flight Formation Control in Lunar Highly Elliptical Orbit Based on Rendezvous Mode

After entering lunar highly elliptical orbit, two microsatellites conduct several orbit maneuvers and finally implement flight formation with the relative range from thousands of kilometers to within 10 kilometers with the support of ground monitoring and control. For the highly elliptical orbit around the moon, the orbit control strategy of formation flight at the rendezvous endpoint is designed based on the multi-impulse rendezvous mode. The linear guidance method is used to iteratively calculate the precise orbit control parameters. A sequential optimized five-impulse orbit maneuvers strategy is designed. Through the progressive segmentation controls of long distance approach,medium distance adjustment and close range capture,the relative status of the orbit planes,arch lines,shapes and phases of the two orbits are corrected. Under the condition of the lunar highly elliptical orbit,the close distance formation of the two microsatellites is achieved with the relative motion trajectory being gradually stable.