Robust Optimal Motion Planning for Multi-aperture Space Systems via Pseudospectral Methods
Abstract
For multi-body, flexible systems, the ability to achieve rapid reorientation maneuvers can be impacted by nonlinear dynamics and uncertainty in the model parameters. Trajectory sensitivity to parameter variations increases final pointing error and residual vibrational energy in the system. This dissertation explores using desensitized optimal control and unscented optimal control methods to generate trajectories robust against parameter variations while decreasing total maneuver time, pointing error, and system excitation. A five-body, flexible model representing a communications satellite is developed, and utilizing robust problem formulations solved via pseudospectral techniques, maneuvers are generated decreasing maneuver time by 62% and terminal system energy by up to 60%. Lastly, reduced fidelity, three-body and two-body models are developed achieving similar robust performance to the five-body model but with an up to 99% reduction in computation time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2021
- Accession Number
- AD1175660
Entities
People
- Brian W. Bishop
Organizations
- Air Force Institute of Technology