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On-orbit application of H-infinity to the middeck active controls experiment: Overview of resultsThe Middeck Active Control Experiment (MACE) was successfully completed during the flight of STS-67 in March 1995. MACE provided an on-orbit validation of modem robust control theory and system identification techniques through the testing of a flexible, multi-instrument, science platform in the micro-gravity environment of the Space Shuttle's Middeck. As part of this experiment, H-infinity control design was validated in zero gravity (0-G) environment. The control objective was to isolate a payload sensor from a 5O Hz bandwidth disturbance occurring on the test article. Controllers were designed with the use of finite element models developed using 1 -G measurements and a measurement model obtained by applying system identification techniques to open loop data obtained on orbit. Over 50 single-input, single-output and multi-input, multi-output, single and multi-axis H-infinity control designs were evaluated on-orbit. Up to 19 dB reduction in vibration levels and 25 Hz bandwidth of control were achieved.
Document ID
19960038388
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Woods-Vedeler, Jessica A. (NASA Langley Research Center Hampton, VA United States)
Horta, Lucas G. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1996
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.15:110239
NASA-TM-110239
Meeting Information
Meeting: AAS/AIAA Space Flight Mechanics Meeting
Location: Austin, TX
Country: United States
Start Date: February 11, 1996
End Date: February 15, 1996
Sponsors: American Inst. of Aeronautics and Astronautics, American Astronautical Society
Accession Number
96N30860
Funding Number(s)
PROJECT: RTOP 233-10-14-03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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