Design of robust decentralized controllers for drag-free satellite

Abstract— In this paper the problem of designing a decentralized robust controller for a plant describing a dragfree satellite is addressed. From recent experiences in dragfree control design we first derive an uncertain plant set representative of many drag-free missions with non spherical test masses. A performance requirement is imposed on the absolute acceleration of the test mass along a measurement axis. The main performance requirement is first broken down into requirements on the uncertain closed loop behavior of the system. The fulfillment of this new set of requirements guarantees robust achievement of the overall system goal. Then optimal single-input-single-output controllers are designed that robustly achieve the desired level of performance. The method proposed allows to properly account for the uncertainties in the design plant retaining the decentralized structure of the controller suggested by the peculiar features of the design plant.

• Type: Conference
• Year: 2008
• Where: CDC
• Authors: Lorenzo Pettazzi, Alexander Lanzon, Stephan Theil
• Keywords: CDC 2008, Control Systems, Decentralized Robust Controller, Performance Requirement, Plant Set Representative