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Cohan, H.

Publications and source records attributed to Cohan, H..

A concept for high speed assembly of erectable space platforms

A simple, fully automatic assembler associated with the on-orbit assembly of tetrahedral truss platforms erected of graphite epoxy tapered columns is described. The assembler, which can operate either as a free flyer or attached to the Orbiter, is capable of constructing a platform from a full load of truss columns and node joints in 36 hours. The geometry of this electrically-driven machine is based on a compound parallelogram system which permits backward as well as lateral translations. Concepts have been developed for half-column assembly as well as for column and node joint insertion into the platform.

Cohan, H.

A unique approach to fabricating precision space structures elements

A procedure of fabricating graphite epoxy columns used in the assembly of large space platforms is described. The requirement for precise dimensional control led to a unique hot resin injection process. Dry, high modulus fiber is wound over a vertically mounted steam-heated mandrel. A steam-heated sleeve or caul is slipped over the wound mandrel and resin is injected and cured in place. Approximately 200 column elements have been fabricated using this efficient process.

Cohan, H.