# AAS 13-836 QUATERNION BASED OPTIMAL SPACECRAFT REORIENTATION UNDER COMPLEX ATTITUDE CONSTRAINED ZONES

@inproceedings{Lee2013AAS1Q, title={AAS 13-836 QUATERNION BASED OPTIMAL SPACECRAFT REORIENTATION UNDER COMPLEX ATTITUDE CONSTRAINED ZONES}, author={Unsik Lee and Mehran Mesbahi}, year={2013} }

The paper addresses quaternion-based energy and time optimal spacecraft reorientation in the presence of complex attitude constrained zones. Designing an optimal reorientation trajectory for a rigid body spacecraft is posed as a nonlinear optimal control problem. In this direction, attitude constrained zones are defined with respect to the onboard instrument under two categories, forbidden and mandatory zones. These zones are parameterized as quadratic inequality constraints in unit quaternions… Expand

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