杆长误差对水下扩展机构的位置精度影响分析

Analysis of Influence of Rod Length Error on Position Accuracy of Underwater Extended Mechanism

由于杆长制造误差等因素的影响,水下探测基阵的扩展机构在扩展运动时会产生位置误差,导致换能器描点轨迹的偏差,影响探测性能。以某水下扩展机构为研究对象,基于封闭矢量法和误差独立作用原理建立了杆长误差下的水下扩展机构位置精度分析模型,研究了实际扩展过程中8个杆长误差及输入角度误差对水下扩展机构输出位置的误差影响,探索了一种杆长误差下的机构运动学分析方法,提出一种在不同加工精度下换能器描点运动轨迹的描述方法。

On account of the manufacturing error of rod length, the expansion mechanism of underwater detection array will produce the position error during extended movement, which leads to the track tracing deviation of transducers and hence affects the detection performance. A underwater expansion mechanism based on the closed- vector method and the principle of independent error function is studied. A position accuracy analysis model for submarine extension mechanism with rod-length error is established. Meanwhile, the effect ofthe eight rod errors and input angles on the position error of underwater expansion mechanism in the process of actual expansion is also studied. A mechanism kinematics analysis method in rod length error is proposed, which makes transducer trace the movement trail in a different ways on different manufacturing accuracy.