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为了实现天琴计划航天器轨道构型的长期稳定漂移并满足轨道构型的稳定性指标,文章应用优化算法搜索航天器初始最优瞬时轨道要素。建立考虑摄动情况下航天器轨道动力学模型,对导致等边三角形轨道构型发生长周期漂移的轨道要素进行了分析,并且将这些要素作为轨道设计的待优化参量,应用粒子群(Particle Swarm Optimization,PSO)智能寻优算法进行优化,应用最终优化得到的轨道要素进行轨道构型仿真。仿真结果表明,在不进行轨道控制的情况下,4年内轨道构型呼吸角变化小于1.5°,臂长变化小于1 500km,臂长变化速率小于10km/s,初步满足轨道构型的稳定性指标。
In order to achieve the long-term stable drift of the orbit configuration of the Tienqin program and to meet the stability index of the orbital configuration, an optimization algorithm is used to search for the initial optimal instantaneous orbital elements of the spacecraft. The trajectory dynamics model of the spacecraft with or without perturbation is established and the orbital elements causing the long-period drift of the equilateral triangular orbit are analyzed. These elements are used as the parameters to be optimized in orbit design. Particle Swarm (Particle Swarm) Optimization, PSO) intelligent optimization algorithm to optimize orbital configuration simulation using the orbital elements obtained by the final optimization. The simulation results show that the change of orbital respiration angle within 4 years is less than 1.5 °, the variation of arm length is less than 1 500 km and the rate of change of arm length is less than 10 km / s, which meets the stability of orbital configuration .