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以坐标变换的方法和多体系统理论为基础,本文结合整体叶轮电解加工试验台,阐述了该试验台的多体系统拓扑结构及其各低序体阵列,定义和分析了各项几何误差,研究了利用特征矩阵得到综合几何空间误差的方法并最终推导出该试验台的几何误差模型。该模型可以从整体精度反推出各零部件的精度,为试验台的精度分配提供了理论基础。
Based on the method of coordinate transformation and multi-body system theory, this paper combines the whole impeller electrolytic machining test stand, expounds the multi-body system topology and its low-order body array, defines and analyzes various geometric errors, The method of using the eigenmatrix to get the synthetic geometric space error is studied and the geometric error model of the test rig is finally deduced. The model can deduce the accuracy of each component from the overall accuracy and provide a theoretical basis for the accuracy of the test bench.