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Record Details

Record 39 of 6631
Decentralized control experiments on NASA's flexible grid
Author and Affiliation:
Ozguner, U.(Ohio State Univ., Columbus, OH, United States)
Yurkowich, S.(Ohio State Univ., Columbus, OH, United States)
Martin, J., III(Ohio State Univ., Columbus, OH, United States)
Al-Abbass, F.(Ohio State University, Columbus , United States)
Abstract: Methods arising from the area of decentralized control are emerging for analysis and control synthesis for large flexible structures. In this paper the control strategy involves a decentralized model reference adaptive approach using a variable structure control. Local models are formulated based on desired damping and response time in a model-following scheme for various modal configurations. Variable structure controllers are then designed employing co-located angular rate and position feedback. In this scheme local control forces the system to move on a local sliding mode in some local error space. An important feature of this approach is that the local subsystem is made insensitive to dynamical interactions with other subsystems once the sliding surface is reached. Experiments based on the above have been performed for NASA's flexible grid experimental apparatus. The grid is designed to admit appreciable low-frequency structural dynamics, and allows for implementation of distributed computing components, inertial sensors, and actuation devices. A finite-element analysis of the grid provides the model for control system design and simulation; results of several simulations are reported on here, and a discussion of application experiments on the apparatus is presented.
Publication Date: Jan 01, 1986
Document ID:
19870026120
(Acquired Nov 28, 1995)
Accession Number: 87A13394
Subject Category: CYBERNETICS
Document Type: Conference Paper
Publication Information: SEE A87-13301
Publisher Information: United States
Contract/Grant/Task Num: NASA ORDER L-91188-B
Financial Sponsor: NASA; United States
Organization Source: Ohio State Univ.; Columbus, OH, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CONTROL SIMULATION; CONTROL SYSTEMS DESIGN; FLEXIBLE BODIES; PERFORMANCE TESTS; SHAPE CONTROL; ADAPTIVE CONTROL; COMPUTATIONAL GRIDS; DYNAMIC CONTROL; FINITE ELEMENT METHOD; VIBRATION DAMPING
Imprint And Other Notes: IN: 1986 American Control Conference, 5th, Seattle, WA, June 18-20, 1986, Proceedings. Volume 2 (A87-13301 03-63). New York, Institute of Electrical and Electronics Engineers, 1986, p. 1045-1051. Research supported by Ohio State University.
Availability Source: Other Sources
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