Z 箍缩动态黑腔中泡沫柱的装配精度和误差源分析

摘要

Based on the analysis of moving platform and vision identification techniques,error source model was proposed to enhance the assembly precision of low density foam column belonged to dynamic hohlraum.Error sources transmission models of design,machining and assembling processes were established,respectively.Moreover,the impact factor of assembly precision influenced by error sources was captured from the prediction model of coaxial degree and axial angle of low density foam column. Finally,a type of dynamic hohlraum was given for demonstrating the effectiveness of the prediction model.When the adhesive random position error of foam column was relatively small,coaxial deviation between predicted value and measured value was from 0.01 mm to 0.03 mm,and axial angle deviation was from 0.05°to 0.34°.It is proved that the methods can provide theoreti-cal foundation for assembly precision prediction and error sources control in the assembly process of low density foam column.%为了提高 Z 箍缩动态黑腔中低密度泡沫柱的装配精度,基于辅助移动平台和视觉识别工艺的基础上,对低密度泡沫柱装配的误差源进行了分析与建模。建立设计、加工和装配误差源传递模型和低密度泡沫柱装配同轴度及轴向夹角精度预测模型,获得各误差源对低密度泡沫柱装配精度的影响大小和规律。最后采用某负载进行了模型的有效性验证,当泡沫柱粘接随机位置误差较小时,同轴误差预测值与实测值偏差为0.01~0.03 mm,轴向夹角预测值与实测值偏差为0.05°~0.34°。实践表明,该方法可为低密度泡沫柱装配精度的预测和误差源控制提供一定的理论支撑。