00000nam 2200000zi 4500 9.894680 CaOODSP 20221107173816 m o d f cr bn||||||||| 201214s1984 onca ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- Co24-3/7-1372-1984E-PDF De Lafontaine, J., author. Stability analysis of flexible spacecraft with PID controller / by J. de Lafontaine. Ottawa : Communications Research Centre, 1984. 1 online resource (viii, 55 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier CRC report ; no. 1372 "Space Technology and Applications Branch." "November 1984." Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. Includes bibliographical references (page 53). "This study presents a graphical method for the design and analysis of a flexible spacecraft controller. It can handle as many modes as desired, in constrained or unconstrained form;modal separability is not assumed and the method is exact when the spacecraft axes are uncoupled. The definition of a 'system function', independent of the controller parameters, simplifies the determination of the system stability boundaries. It also allows the investigation of the modal separability assumption, resulting in a criterion for its validity. Stabilization through structural damping and flexible modes filtering is illustrated using graphs of the system function. Closed-form approximations are derived in order to complement the exact, numerical method. Extensions to systems with loop delay andnonlinear elements are also included along with applications to the LSAT-1 Roll axis"--Abstract. PID controllers. Expandable space structures. Space vehicles Control systems. Stability of space vehicles. Régulateurs PID. Structures flexibles. Véhicules spatiaux Systèmes de commande. Vaisseaux spatiaux Stabilité. Communications Research Centre (Canada), issuing body. CRC report ; no. 1372. (CaOODSP)9.882492 PDF 1.81 MB https://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-7-1372-1984-eng.pdf