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Accommodation of kinematic disturbances during a minimum-time maneuver of a flexible spacecraft

作者:科技文献资料网 时间:2018-10-19 15:46:51  浏览:8090   来源:科技文献资料网
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[唯一标识符]:CDSITC.AEROSPACE.A88-50440
[文献来源]:美国航空航天数据库(aerospace);国际航宇文摘(IAA)
[资源原始索取号]:A1988-50440; Reference AN: A88-50440
[标题]:Accommodation of kinematic disturbances during a minimum-time maneuver of a flexible spacecraft
[作者]:SHARONY YAAKOV; MEIROVITCH LEONARD
[来源]:AIAA and AAS Astrodynamics Conference Minneapolis MN Aug. 15 17 1988. 17 p.
[文摘]:This paper is concerned with control of the perturbations experienced by a flexible spacecraft during a minimum-time maneuver. The spacecraft is modeled as a flexible appendage attached to a rigid hub. The perturbations consist of rigid-body deviations and elastic vibration. The vibration is described by a linear, time-varying set of ordinary differential equations subjected to piecewise-constant disturbances caused by inertial forces resulting from the maneuver. The control is carried out during the maneuver period, which is relatively short, and it uses an observer that estimates the controlled state and part of the disturbance vector. The controller is divided into an optimal finite-time linear quadratic regulator for the reduced-order model and a disturbance-accommodation control that minimizes a weighted norm spanning the full modeled state. The controller is designed to mitigate the effects of control and observation spillover, as well as of modeling errors. The developments are illustrated by means of a numerical example. (Author)
[关键词]:FLEXIBLE SPACECRAFT; LINEAR QUADRATIC REGULATOR; OPTIMAL CONTROL; SPACECRAFT MANEUVERS; STRUCTURAL VIBRATION; VIBRATION DAMPING; CONTROL SYSTEMS DESIGN; EIGENVALUES ; EQUATIONS OF MOTION; LEAST SQUARES METHOD; MATRICES MATHEMATICS
[出版年份]:1988
[专业领域]:SPACECRAFT DESIGN, TESTING AND PERFORMANCE
[馆藏索取号]:A88-50440


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[唯一标识符]:CDSITC.AEROSPACE.A92-43336
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1992-43336; Reference AN: A92-43336
[标题]:Candidate Mars Local Navigation Infrastructures
[作者]:BRAND TIMOTHY J; SHEPPERD STANLEY W
[书名]:IN: Astrodynamics 1991; Proceedings of the AAS/AIAA Astrodynamics Conference, Durango, CO, Aug. 19-22, 1991. Pt. 2 (A92-43251 18-13). San Diego, CA, Univelt, Inc., 1992, p. 1477-1493.
[文摘]:With the large number and variety of missions phases currently under consideration for Mars exploration, it is likely that some form of Local Navigation Infrastructure (LNI) will be necessary especially for critical mission phases. It is assumed that surface beacons (Navsites) are going to be needed to provide a stable planetary reference for just about any navigation infrastructure envisioned. As a result, infrastructure establishment must include both surveying the beacon locations, and then using them to maintain the satellite ephemeris of any orbiting infrastructure elements (Navsats). By means of physical and mission constraints, this study identifies some of the key design drivers for such an infrastructure, and investigates the performance of some candidate minimal systems. (Author)
[关键词]:DUST STORMS; MARS ENVIRONMENT; MARS SURFACE; SPACE NAVIGATION; DEEP SPACE NETWORK; PLANETARY LANDING; SPACE EXPLORATION
[出版年份]:1992
[专业领域]:SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAN 1987
[唯一标识符]:CDSTIC.ISTP.1529995
[文献来源]:科学技术会议录索引(ISTP)
[文献类型]:科技会议
[标题]:A Generic Conspectus of the Forage Legumes of the Mediterranean Basin
[作者]:K Woodgate;N Maxted;SJ Bennett
[出版单位]:Kluwer Academic PublDordrecht
[ISSN_ISBN]:0-7923-5522-9
[会议名称]:International Workshop on Genetic Resources of Plant and Forage Legumes in Mediterranean Environments,York, Australia,October 14-18, 1996
[来源]:GENETIC RESOURCES OF MEDITERRANEAN PASTURE AND FORAGE LEGUMES,pp 182-226
[系列名称]:CURRENT PLANT SCIENCE AND BIOTECHNOLOGY IN AGRICULTURE
[编辑者]:ESJ Bennett;PS Cocks
[主办单位]:Clima;Grains Res & Dev Corp;Woolmark
[地址]:K Woodgate,Univ_Birmingham, Sch Biol Sci, POB 363, Birmingham B15 2TT, W MIDLANDS, England
[专业领域]:Agriculture

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