국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Structurally Adaptive Space Crane Concept for Assembling Space Systems on Orbit
저자	John T. Dorsey, Thomas R. Sutter and K. Chauncey Wu
Keyword	Space structures; Space crane; On-orbassembly; Truss structures; Adaptive structures
URL	http://techreports.larc.nasa.gov/ltrs/PDF/tp3307.pdf
보고서번호	NASA TP-3307
발행년도	1992
출처	NASA Langley Research Center
ABSTRACT	Many future human space exploration missions will probably require large vehicles that must be assembled on orbit. Thus, a device that can move, position, and assemble large and massive spacecraft components on orbit becomes essential for these missions. This paper describes a concept for such a device---a space crane concept that uses erectable truss hardware to achieve high-stiffness and low-mass booms and uses articulating-truss joints that can be assembled on orbit. The hardware has been tested and shown to have linear load-deflection response and to be structurally predictable. The hardware also permits the crane to be reconfigured into different geometries to satisfy future assembly requirements. A number of articulating and rotary joint concepts have been sized and analyzed, and the results are discussed in this paper. Two strategies have been proposed to suppress motion-induced vibration: placing viscous dampers in selected truss struts and preshaping motion commands. Preliminary analyses indicate that these techniques have the potential to greatly enhance structural damping.