parallel beam projector
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Based on the instantaneous motion of the moving platforms, the uncertainty configuration conditions and simplified uncertainty configuration equations are obtained for the widely studied parallel manipulators, such as planar 3-DOF parallel manipulator, spherical 3-DOF parallel manipulator, 6-SPS triangular platform parallel manipulator, three-branch 6-DOF parallel manipulator, twotriangular-platform parallel manipulator, DELTA parallel manipulator, 5-DOF parallel manipulator, two-tetragonal-platform parallel manipulator, pentagonal platform parallel manipulator and Stewart platform parallel manipulator.
采用这一方法,根据国内外常用的并联机器人机构的形式,建立了平面3自由度并联机器人、球面3自由度并联机器人、三角平台并联机器人、三支链6自由度并联机器人、双三角平台并联机器人、DELTA并联机器人、5自由度并联机器人、双四角平台并联机器人、五角平台并联机器人和Stewart平台并联机器人的奇异位形条件方程,除了Stewart平台并联机器人外,这些条件方程均为低于6阶的行列式,机器人结构类型不同,其简化程度各不相同。
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The arch bending on the top of the original main arch ring corresponds to every arch rib and the bottom beam on its landscape orientation. As a result it becomes a down arc frame similar to slab-and-beam floor system. On the arch bending and bottom beam just established, standing pillar, main beam, horizontal rib beam and bridge front-panel would be built subsequently. Both ends of the main beam would then be put off the new hat beam made of reinforced concrete. Now, it becomes an upper slab-and-beam floor system. Two decks will be joined together on the middle of the bridge, which forms the ability of spanning and loading.
在原主拱圈拱肋相应位置处增设拱伏,横向增设底梁,形成一个下层弧形的类似肋梁楼盖的结构;在已浇筑好的拱伏与底梁上,继续现浇立柱、主梁和横向肋梁、桥面板,主梁的两端搁置在桥台处新增加的钢筋混凝土台帽梁上,形成一个上层肋梁楼盖结构,并且上下两层楼盖在桥梁跨中互为渗透结合成一个牢固的整体,共同完成了跨越和承载的能力。
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parallel beam projector:平行光束投射器
parallel axis theorem 平行轴定理 | parallel beam projector 平行光束投射器 | parallel circuit 并联电路
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parallel beam projector:平 光束投射器
1711 parallel axis theorem 平 轴定 | 1712 parallel beam projector 平 光束投射器 | 1713 parallel circuit 并 电