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Stability enhancement for control of flexible space structures
This paper demonstrates the application of linear-quadratic-Gaussian/ loop transfer recovery (LQG/LTR) techniques to the active control of a flexible spaceborne optical support structure. LQG compensators are designed for three actuator/ sensor placements on the structure in the context of an 18-mod...
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Published in: | IEEE Control Systems Magazine 1986-06, Vol.6 (3), p.19-26 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | This paper demonstrates the application of linear-quadratic-Gaussian/ loop transfer recovery (LQG/LTR) techniques to the active control of a flexible spaceborne optical support structure. LQG compensators are designed for three actuator/ sensor placements on the structure in the context of an 18-mode reduced-order structural model. The state-feedback (LQ) portion of each design meets stringent line-of-sight performance requirements in the face of two wide-band disturbances impinging on the structure. Conditions on the open-loop transfer matrix, broken at the plant input, are stated which make more robust the response of the LQG designs to the 132 high-frequency elastic modes excluded from the design model. Through loop transfer recovery, with LQ dynamics as the goal, closed-loop stability in the presence of all 150 elastic modes is maintained for two of the actuator/sensor selections. Difficulties in achieving performance robustness are noted. |
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ISSN: | 0272-1708 2374-9385 |
DOI: | 10.1109/MCS.1986.1105093 |