自主交会对接绕飞轨道的双冲量控制改进算法

Improved Two-impulse Control Algorithm for Autonomous Rendezvous and Docking in Fly-by Orbit

绕飞轨道控制是追踪器与非合作目标进行自主交会对接的关键技术。本文针对同轨道平面的绕飞问题,根据双冲量轨道逼近动力学特性,将绕飞轨道分解为两个逼近轨道,采用有摄动情况下双冲量轨道逼近改进算法实现绕飞轨道控制。绕飞控制时,在轨道误差范围内,数次冲量累计同时施加,减少由于单次冲量小而造成的较大相对误差。最后进行了数学仿真,仿真结果表明该算法能实现绕飞轨道控制,具有设计简单、燃料消耗少的特点。

Fly-by control is the key technique of autonomous rendezvous and docking between chaser and incoordinated target.Focusing on the in-plane fly-by control,the paper describes the division of two approach orbits started from a fly-by orbit and then uses the improved two-impulse control under the perturbations to achieve the orbit control based on the dynamic characteristics of two-impulse orbit approach.In the meantime of the fly-by control,the accumulation of several impulses applied at one time within the allowable errors can greatly reduce relative errors caused by the small single-impulse.Finally,the simulation results indicate that this algorithm can achieve the control of fly-by orbit,and make the benefits of agile design and energy saving.