University of Minnesota
Aerospace Engineering and Mechanics
Spring 1998 Seminar Series



Low-Thrust, Minimum-Fuel, Earth Moon, Orbital Transfers

Professor Bion Pierson
Department of Aerospace Engineering
and Engineering Mechanics

Iowa State University



Abstract


Abstract: Optimal control methods are applied to a class of minimum-fuel Earth-moon transfers from a circular low Earth parking orbit to a circular low lunar parking orbit for low-thrust propulsion systems with thrust-to-weight ratios on the order of 0.001 to 0.0001. The optimal trajectory is restricted to a thrust-coast-thrust sequence. Several special numerical techniques are required to enhance convergence to a solution. Both two- and three-dimensional numerical results will be presented. In the latter case, the lunar parking orbit is inclined 90 degrees from the Earth-moon plane.


Friday, May 22, 1998
209 Akerman Hall
2:30-3:30 p.m.


Refreshments served after the seminar in 227 Akerman Hall.
Disability accomodations provided upon request.
Contact Audrey Stark-Evers, Senior Secretary, 625-8000.