长周期高精度回归轨道与脉冲轨道控制策略设计

针对长周期回归轨道设计和维持问题，研究了一种基于高阶Poincaré映射的高精度引力场中回归轨道优化设计和控制的通用性半解析方法，其中摄动包含大气阻力、太阳辐射压力和日月三体引力等因素。通过对Poincaré映射进行高阶展开并表示为多项式形式，可精确近似对一个或者多个回归周期内的轨道递推，从而在赤道升交点处施加脉冲推力，实现高精度的回归轨道设计和控制。提出了分别解决严格和宽松2种回归约束下问题的方法，并应用于实际在轨TerraSAR-X、Landsat-8、IRS-P6、SPOT-7和UoSAT-12任务的回归模式。所提方法具有计算效率和精度高的优点，可用于星上自主轨道递推和轨道控制。 

Design of long-duration high-precision repeat ground-track orbit and its impulsive orbital control strategy

Aimed at the design and maintenance of long-duration repeat ground-track orbit, this paper deals with a semi-analytical method based on high-order Poincaré maps for the optimal design and control of repeat ground-track orbit in the high-precision gravity fields, including the factors of atmospheric drag, solar radiation pressure and three-body perturbations. The method is based on the high-order expansion of Poincaré maps, which is expressed as the polynomials, to propagate the orbit for one or more repeat cycles, enabling the precise orbit design and control by performing impulsive control at the equatorial crossings. The method, aimed at both the high-accuracy and low-accuracy constraints, is proposed and applied to missions like the repeat pattern of TerraSAR-X, Landsat-8, IRS-P6, SPOT-7 and UoSAT-12. The present method has the advantages in high computational efficiency and high accuracy, which is suitable for the on-board autonomous orbital propagation and orbital control.