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Magnetic Excitation for Spin Vibration TestingThe Dynamic Spin Rig Laboratory (DSRL) at the NASA Lewis Research Center is a facility used for vibration testing of structures under spinning conditions. The current actuators used for excitation are electromagnetic shakers which are configured to apply torque to the rig's vertical rotor. The rotor is supported radially and axially by conventional bearings. Current operation is limited in rotational speed, excitation capability, and test duration. In an effort to enhance its capabilities, the rig has been initially equipped with a radial magnetic bearing which provides complementary excitation and shaft support. The new magnetic feature has been used in actual blade vibration tests and its performance has been favorable. Due to the success of this initial modification further enhancements are planned which include making the system fully magnetically supported. This paper reports on this comprehensive effort to upgrade the DSRL with an emphasis on the new magnetic excitation capability.
Document ID
19970026139
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johnson, Dexter
(NASA Lewis Research Center Cleveland, OH United States)
Mehmed, Oral
(NASA Lewis Research Center Cleveland, OH United States)
Brown, Gerald V.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
August 17, 2013
Publication Date
April 1, 1997
Publication Information
Publication: Physics and Process Modeling (PPM) and Other Propulsion R and T
Volume: 2
Subject Category
Structural Mechanics
Report/Patent Number
Paper-29
Accession Number
97N25487
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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