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Record Details

Record 42 of 2014
Dynamic modeling of brushless dc motors for aerospace actuation
Author and Affiliation:
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)
Abstract: A 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.
Publication Date: Nov 01, 1980
Document ID:
19810031604
(Acquired Nov 30, 1995)
Accession Number: 81A16008
Subject Category: ELECTRONICS AND ELECTRICAL ENGINEERING
Document Type: Journal Article
Publication Information: IEEE Transactions on Aerospace and Electronic Systems; p. Nov. 198; 16
Publisher Information: United States
Contract/Grant/Task Num: NAS9-15091
Financial Sponsor: NASA; United States
Organization Source: Virginia Polytechnic Inst. and State Univ.; Blacksburg, VA, United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACTUATORS; AEROSPACE SYSTEMS; DYNAMIC MODELS; ELECTRIC MOTORS; ELECTRONIC CONTROL; POWER CONDITIONING; COMPUTERIZED SIMULATION; DIRECT CURRENT; ELECTROMECHANICAL DEVICES; FEEDBACK CONTROL; PROTOTYPES; SERVOCONTROL; TRANSIENT RESPONSE; TRANSISTOR CIRCUITS
Imprint And Other Notes: IEEE Transactions on Aerospace and Electronic Systems, vol. 16, Nov. 1980, p. 811-821.
Miscellaneous Notes: p. 811-821
Availability Source: Other Sources
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