小天体伴飞的常推力控制

小天体探测的轨道控制和保持非常重要.深空探测中常采用推力大小不可变的小推力发动机进行轨道控制,本文研究利用常推力实现小天体伴飞的控制方法.同时考虑太阳和小天体的引力,提出一种常推力实现伴飞位置保持的阈值控制方法,当误差超过阈值时进行主动控制.该控制方法实现探测器的位置保持需要控制周期长,消耗推进剂少,实现简单.

Utilization of constant low thrust for control of spacecraft near asteroid

The control of spacecraft near the asteroid is very important for asteroid exploration.Low thruster is always used in deep space exploration and the thrust magnitude is usually constant.This paper investigates the control method of spacecraft near asteroid using constant low thrust.Considering the gravity of the Sun and asteroid,a threshold control method is proposed for station-keeping of the spacecraft.The controller is triggered when the position error is greater than the threshold.The method has a long control period and low propellant consumption and is feasible for engineering practice.