00000nam 2200000zi 4500 9.888783 CaOODSP 20221107172105 m o d f cr |n||||||||| 200629e198302##onca o f000 0 eng d CaOODSP eng rda CaOODSP Co24-3/1-83-023E-PDF Hughes, P. C. (Peter Carlisle), 1940- author. Acceleration feedback in the control of flexible structures / author: P.C. Hughes ; prepared by: Dynacon Enterprises Ltd. Ottawa, Canada : Department of Communications, Space Program, February 1983. 1 online resource (43 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier DOC contractor report ; DOC-CR-SP-83-023 "Unclassified." "Dynacon report DAISY-2." "Department of Supply and Services Contract no: 22ST.36001-2-0727." Digitized copy from print [produced by Innovation, Science and Economic Development Canada]. "The use of accelerometers as sensing elements for the control of large flexible space structures is explored. It is shown that, in addition to ordinary measurement error, the forces and torques on the vehicle produce additional direct errors in accelerometer interpretation. The portion of this additional error due to known forces and torques can be eliminated by feedforward within the control system. Moreover, because the interpretation of accelerometer outputs in terms of displacement and displacement-rate requires the structural math model itself, a still further source of control system error arises: parameter errors in the structural dynamics model used by the control system designer. This is examined in detail in this report for four types of control system design: simple (static) state feedback, simple (static) measurement feedback, state feedback based on a state vector estimated by a full-order state estimator, and state feedback based on a state vector estimated by a reduced-order (in fact, minimal order) state estimator. With these considerations in mind, and the theory in this report for guidance, additional numerical and simulation work can show quantitatively what the benefits and limitations of accelerometers are in specific situations"--Summary. Accelerometers. Expandable space structures. Accéléromètres. Structures flexibles. Canada. Department of Communications. Space Program, issuing body. Dynacon Enterprises Ltd., consultant. DOC contractor report (Canada. Department of Communications) DOC-CR-SP-83-023. (CaOODSP)9.869864 PDF 2.75 MB https://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-1-83-023-eng.pdf