Attitude Maneuver Planning of Target Spacecraft Under Collaborative On-Orbit Inspection

The article focuses on collaborative on-orbit inspection involving cooperative target space-craft (TSc). Attitude maneuver planning of the TSc is implemented to ensure that its features can be observed by multiple closely accompanying observers. A method for discriminating the visibility of features is proposed based on the spacecraft's structural dimensions. The article introduces a double-loop optimization framework: the outer loop adopts rolling planning to determine the expected attitude, while the inner loop employs the deep deterministic strategy gradient algorithm (DDPG) to quickly solve the maneuvering trajectory and determine the associated cost. The planning process considers the pointing constraints of the optical load and the maneuverability constraints of the executing mechanism. Finally, the feasibility of the optimization framework is rigorously validated through the simulation examples provided.