An Guidance and Control Method with Feedforward Compensation for Target Tracking by Satellite

The dynamic target tracking problem is one of the essential issues on satellite surveillance and attitude pointing control. Because of target's non-cooperative characteristic and the discontinuity of the sampling points output by satellite's optical sensor, the two-dimensional guidance angles measurements obtained by satellite's optical sensor cannot be utilized directly by satellite attitude real-time control system. In order to acquire high accuracy control of dynamic target tracking, an algorithm to calculate target's longitude and latitude coordinate location information is given. Based on the longitude and latitude coordinate location information, the lease square method is introduced to obtain the target's kinematic function. Then, target's real-time location, velocity and acceleration can be predicted by the kinematic function. Based on target's real-time kinematic information, a feed forward compensation control algorithm is designed for satellite's attitude pointing tracking control. Finally, the effectiveness of the algorithm is tested by mathematical simulation results.