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Record Details

Record 17 of 6226
An electromechanical actuation system for an expendable launch vehicle
Author and Affiliation:
Burrows, Linda M.(NASA Lewis Research Center, Cleveland, OH, United States)
Roth, Mary E.(NASA Lewis Research Center, Cleveland, OH, United States)
Abstract: A major effort at NASA-Lewis in recent years has been to develop electro-mechanical actuators (EMA's) to replace the hydraulic systems used for thrust vector control (TVC) on launch vehicles. This is an attempt to overcome the inherent inefficiencies and costs associated with the existing hydraulic structures. General Dynamics Space Systems Division, under contract to NASA Lewis, is developing 18.6 kW (25 hp), 29.8 kW (40 hp), and 52.2 kW (70 hp) peak EMA systems to meet the power demands for TVC on a family of vehicles developed for the National Launch System. These systems utilize a pulse population modulated converter and field-oriented control scheme to obtain independent control of both the voltage and frequency. These techniques allow an induction motor to be operated at its maximum torque at all times.
Publication Date: Jan 01, 1992
Document ID:
19930041894
(Acquired Dec 28, 1995)
Accession Number: 93A25891
Subject Category: LAUNCH VEHICLES AND SPACE VEHICLES
Document Type: Conference Paper
Publication Information: In: IECEC '92; Proceedings of the 27th Intersociety Energy Conversion Engineering Conference, San Diego, CA, Aug. 3-7, 1992. Vol. 1 (A93-25851 09-44); p. 1.251-1.255.; (SEE A93-25851)
Publisher Information: Society of Automotive Engineers, Inc., Warrendale, PA, United States
Contract/Grant/Task Num: RTOP 506-41-41
Organization Source: NASA Lewis Research Center; Cleveland, OH, United States
NASA; Washington, DC, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACTUATORS; CONTROL EQUIPMENT; ELECTROMECHANICAL DEVICES; ELECTROMECHANICS; EXPENDABLE STAGES (SPACECRAFT); LAUNCH VEHICLES; THRUST VECTOR CONTROL; AEROSPACE SYSTEMS; CONTROLLERS; INDUCTION MOTORS; RELIABILITY
Imprint And Other Notes: In: IECEC '92; Proceedings of the 27th Intersociety Energy Conversion Engineering Conference, San Diego, CA, Aug. 3-7, 1992. Vol. 1 (A93-25851 09-44), p. 1.251-1.255.
Miscellaneous Notes: Previously announced in STAR as N92-30310
Availability Source: Other Sources
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