Analytical and Photogrammetric Characterization of a Planar Tetrahedral TrussLangley Research Center, 1990 - 30 pages |
Common terms and phrases
19 upper surface 20 Node Number analytically predict assembled truss average Axonometric projection Belleville washers best-fit plane bundle adjustment close-range photogrammetry compression cross-sectional stiffness data frame DCDT DCDT's Deflection determined displacement of truss effect elastic modulus error sources experimental figure 8(b finite element analysis finite element model function of node graphite tube graphite-epoxy tube gravity load intended shape joint receptacles joint section Langley Research Center length variation load cell load-displacement Locking nut Lower joint Measured node positions measurement precision member axial stiffness minimize its contribution NASA node locations nominal normal displacement normal equations object space coordinate percent Photogrammetry test photographed predicted and measured predicted node projective equations projective parameters retroreflective root mean square rotation shape to minimize shown in figure stations stiff truss sults support truss surface error tensile preload tetrahedral truss structure tion truss components truss nodes truss surface truss upper surface Upper joint upper surface nodes values