Abstract: The lattice structure is a good structure which can exert the mechanical property of composite. The topology and dimension optimization methods were studied, and the space manipulator was optimized by finite element analysis software. The topology optimization method was used to make conceptual design and get the approximate shape of the truss. The dimension optimization method was used to make sure the specific sizes of every bar. The optimization result is a lattice structure whose cross section has sixteen edge. Comparing with the filament-wound composite pipe, the composite lattice structure has lighter weight. There is some reference value for the composite lattice structure optimum design.

Key words: composite, lattice structure, space manipulator, optimum design