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Dynamic modeling of brushless dc motors for aerospace actuationA discrete time model for simulation of the dynamics of samarium cobalt-type permanent magnet brushless dc machines is presented. The simulation model includes modeling of the interaction between these machines and their attached power conditioners. These are transistorized conditioner units. This model is part of an overall discrete-time analysis of the dynamic performance of electromechanical actuators, which was conducted as part of prototype development of such actuators studied and built for NASA-Johnson Space Center as a prospective alternative to hydraulic actuators presently used in shuttle orbiter applications. The resulting numerical simulations of the various machine and power conditioner current and voltage waveforms gave excellent correlation to the actual waveforms collected from actual hardware experimental testing. These results, numerical and experimental, are presented here for machine motoring, regeneration and dynamic braking modes. Application of the resulting model to the determination of machine current and torque profiles during closed-loop actuator operation were also analyzed and the results are given here. These results are given in light of an overall view of the actuator system components. The applicability of this method of analysis to design optimization and trouble-shooting in such prototype development is also discussed in light of the results at hand.
Document ID
19810031604
Document Type
Reprint (Version printed in journal)
Authors
Demerdash, N. A. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Nehl, T. W. (Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Date Acquired
August 11, 2013
Publication Date
November 1, 1980
Publication Information
Publication: IEEE Transactions on Aerospace and Electronic Systems
Volume: 16
Subject Category
ELECTRONICS AND ELECTRICAL ENGINEERING
Funding Number(s)
CONTRACT_GRANT: NAS9-15091
Distribution Limits
Public
Copyright
Other