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An optimal dynamic output feedback controller for a flexible spacecraft

Sreenatha, AG and Bhat, Seetharama M and Shrivastava, SK (1990) An optimal dynamic output feedback controller for a flexible spacecraft. In: Optimal Control Applications and Methods, 11 (1). pp. 51-66.

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Abstract

The design of a low-order dynamic output feedback controller for a flexible spacecraft is carried out using modified linear quadratic Gaussian (LQG) theory. The necessary conditions for optimization are given. The linear equations governing a flexible spacecraft with a central rigid body and two sun-tracking solar panels are presented. The parameters of the Solar Electric Propulsion Spacecraft (SEPS) are selected for analysis and simulation. The optimal gains for the dynamic controller are estimated using an iterative algorithm. The sequential procedure which assures convergence is selected. The initial gains which stabilize the system are chosen on the basis of the principle of a PD controller. A third-order controller for pitch, roll and yaw axes of the 18th-order system, which includes sensor and actuator dynamics, is designed. Numerical simulations carried out to ascertain the performance of the controller show the performance to be satisfactory.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley & Sons.
Keywords: Output feedback; Dynamic controller; Optimal control; Flexible spacecraft
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 12 Feb 2008
Last Modified: 27 Aug 2008 13:11
URI: http://eprints.iisc.ernet.in/id/eprint/13016

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