Electromagnetic satellite cluster collision prediction and avoidance

A two-spacecraft cluster in deep space collision prediction and avoidance is discussed in this paper, with double-integral model as dynamics model. Collision probability calculation is based on relative motion states and covariance matrix prediction. Collision avoidance mechanism, employing electromagnetic force as control force, distance and distance rate as feedback, will start when collision probability is beyond upper limit. Control law was designed by making use of Lyapunov method, aimed to avoid collision and make distance rate approach to zero.