Fuel/Time Optimal Control of Flexible Space Structures: A Frequency Domain Approach

Author:

Hartmann Rolf1,Singh Tarunraj1

Affiliation:

1. Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, NY, 14260, USA

Abstract

This paper considers the design of open-loop fuel/time optimal controllers for flexible space struc tures using a frequency domain approach. The control system consists of a time-delay filter whose output signal is the optimal control profile when it is subject to a step input. A constrained parameter optimization problem is formulated to minimize a weighted combination of fuel consumed and total maneuver time for a rest-to-rest maneuver. The parameters to be optimized for are the delays of a time-delay filter. The number of switches of the fuel/time optimal control profile is shown to be a function not only of number of flexible modes but also of the weighting parameter, which is illustrated via numerical examples.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science

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