Fiscal Year	2007
Division	Graduate School of Engineering & Applied Science
Department	Mechanical & Aerospace Engineering
Investigator(s)	Cristi, Roberto Agrawal, Jr., Brij N.
Sponsor	Secretary of the Air Force FMBMB (Air Force)
Summary	The objective of this project is to develop advanced control techniques to improve pointing performance of the spacecraft. In 2005, particle filter was evaluated for attitude estimation and compared with Extended Kalman Filter approach. In the proposed research effort, the objective is to develop adaptive algorithms for fine pointing control of flexible spacecraft. The system has to work in the presence of sensor errors, external disturbances, vibrations from flexible structures and uncertainties in the inertia parameters and structural frequencies of the spacecraft. In Phase I, the tasks will include modeling of three axis spacecraft simulator, online identification of rigid body parameters and adaptive control, and estimation and rejection of flexible modes by adaptive filters. In Phase II, the algorithms developed in Phase I will be implemented on Three Axis Simulator and these adaptive control techniques will be experimentally validated.
Keywords	Satellites and Computers
Publications	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal
Data	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal