NDLI: Assessment of the cofsi/mast i project

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Assessment of the cofsi/mast i project

Content Provider	NASA Technical Reports Server (NTRS)
Author	Chew, Meng-Sang
Copyright Year	1987
Description	The COFS (MAST I) deployer/retractor assembly (DRA) which has a cluster of mechanisms that constitute the collapsible/extensible Mast, contains mechanisms/linkages that deploy and retract. The Mast is a flexible spatial (3D) linkage with hinges that lock into place during deployment to form a truss type structure. It is 60 meters long with repeating sections of two bays. Each bay has alternating diagonals. All joints are single degree-of-freedom hinges, arranged such that the Mast does not rotate during deployment/restow and that deformation energy is minimized. Mispan hinges are incorporated in the diagonals and half of the batten members. The various operational aspects and characteristics of the various mechanisms within the DRA are analyzed. In view of the disadvantages of statical in determinancy as well as the inefficiencies inherent in recirculating gear trains, it is recommended that the bevel gear trains and the bell-crank mechanisms be redesigned.
File Size	1372395
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19880000958
Archival Resource Key	ark:/13960/t0rr6r20g
Language	English
Publisher Date	1987-09-01
Access Restriction	Open
Subject Keyword	Mechanical Engineering Linkages Hinges Torque Joints Junctions Gears Expandable Structures Design Analysis Loads Forces Trusses Structural Analysis Large Space Structures Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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