Powered Safe Abort for Autonomous Rendezvous of Spacecraft
نویسندگان
چکیده
Several recent on-orbit autonomous docking missions have experienced serious failures requiring immediate safing action. The future of autonomous spacecraft rendezvous will depend on the ability of docking algorithms to effectively handle off-nominal situations resulting from anomalous system behaviors. This paper presents a method for online generation of actively safe fuel-optimized rendezvous trajectories. These trajectories guarantee the existence of known powered abort trajectories providing collision-free escape, even in the presence of single thruster failures. Numerous examples are presented to demonstrate the overall benefits of incorporating these active safety constraints when compared to nominal trajectory design techniques. A stochastic analysis is used to demonstrate that imposing active safety as a constraint decreases the overall likelihood of collisions occurring.
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