汇流环主轴刚度对测角系统精度的影响

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The angle measurement accuracy deviation has occurred in the adjustment of a radar angle measurement system. It is confirmed that this deviation is resulted from the disturbance of the turning collector ring spindle. The problem is modeled using the finite element analysis software MSC Nastran. Model twist and deformation of the collector ring spindle with different materials and different shapes are studied. Simulation analysis result confirms that the reason of the slight angle measurement accuracy deviation of the .axial angle coder is that the collector ring spindle is not rigid enough. Results of this paper have guidance value for similar design.针对某雷达测角系统调试过程中出现轴角精度超差的现象，分析确定原因在于汇流环主轴转动扰动。应用MSCNastran有限元软件建模，通过仿真分析研究了汇流环主轴模型在不同材料、不同形状时的扭曲变形，确定了汇流环主轴刚度不足造成轴角编码器测角精度细微偏差。对类似系统的设计具有指导意义。