Satellite Recovery Control Strategy Based on Attitude Error Information Fusion

Reentry braking maneuver is the most important TT&C operation of recovery satellites. After finishing appointed missions, a recovery satellite needs to reenter into the atmosphere, land on the ground, and be recovered. During the recovery process, it is necessary for the satellite to perform a series of maneuver or control operations, such as adjusting body attitude, separating recovery capsule from orbit capsule, igniting braking rocket, etc. The ignition attitude information of braking rocket has a close relationship with the length of the reentry trajectory and size of the landing area. So, attitude error information is the key factor to determining the recovery control strategy of the satellite. In order to shorten reentry trajectory length, increase coverage of TT&C, increase recovery control accuracy and narrow landing area size, a new method to make recovery control strategies for the satellites is proposed based on attitude error information fusion.