基于约束线图的超导重力梯度敏感结构型综合

基于约束线图对超导重力梯度敏感结构进行型综合,分析轴向分量与交叉分量单独敏感的结构自由度与约束线图,并结合超导重力梯度测量应用提出两分量同时敏感的结构,利用自由度与约束线图确定约束类型,等效为柔性圆柱副,并选择柔性元件进行并联机构形式的布局.在型综合的基础上,通过模态仿真对比,得到两端与柔性球铰联接的刚性杆结构适于在两分量敏感结构中应用的结论.刚度特性仿真分析结果表明两分量敏感结构具有设计运动方向刚度小、寄生运动方向刚度大、运动耦合小的特点,适于在超导重力梯度测量系统中应用.

Type synthesis for sensing mechanism of superconductor gravity gradient based on constraint pattern

Based on constraint pattern, the type synthesis for sensing mechanism of superconductor gravity gradient was produced. The independent sensing mechanism of inline or cross component of gravity gradient was analyzed, and the freedoms of motion and constraint pattern of mechanism were deduced. The simultaneous sensing mechanism of two components was presented for the measurement application. The constraint type was determined by the freedoms of motion and constraint pattern and equivalent to flexible cylinder joint, which could be built by flexible elements according to parallel mechanism form. By means of modal emulation, it can be concluded that rigid rod with flexible spherical hinge on two ends of rod is applicable for the sensing mechanism of two components. The stiffness emulation results indicate that the stiffness of design motion is small, the stiffness of parasitic motion is large, and coupling of motions is little. It is proved that the simultaneous sensing mechanism of two components is appropriate for the measurement system of superconductor gravity gradient.