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Coarse-fine residual gravity cancellation system with magnetic levitationAircraft flight along parabolic trajectories have been proposed and executed in order to achieve low cost, near free fall conditions of moderate duration. This paper describes a six degree of freedom experiment isolation system designed to cancel out residual accelerations due to mechanical vibrations and errors in aircraft trajectory. The isolation system consists of a fine motion magnetic levitator whose stator is transported by a conventional coarse motion stage. The levitator uses wide gap voice coil actuators and has the dual purpose of isolating the experiment platform from aircraft vibrations and actively cancelling residual accelerations through feedback control. The course motion stage tracks the levitated platform in order to keep the levitator's coils centered within their matching magnetic gaps. Aspects of system design, an analysis of the proposed control strategy and simulation results are presented. Feasibility experiments are also discussed.
Document ID
19920018504
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Salcudean, S. E.
(British Columbia Univ. Vancouver., United States)
Davis, H.
(British Columbia Univ. Vancouver., United States)
Chen, C. T.
(British Columbia Univ. Vancouver., United States)
Goertz, D. E.
(British Columbia Univ. Vancouver., United States)
Tryggvason, B. V.
(Canadian Space Agency Ottawa, Ontario , Canada)
Date Acquired
September 6, 2013
Publication Date
May 1, 1992
Publication Information
Publication: NASA. Langley Research Center, International Symposium on Magnetic Suspension Technology, Part 1
Subject Category
Mechanical Engineering
Accession Number
92N27747
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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