Error analysis shows that the displacement measuring error entirely depends on geometric positioning precision of the first bar code center.
误差分析表明：位移测量误差完全取决于首条码中心几何定位。
The geometric error modeling of NC machine tools is the key technique to dynamics design, precision analysis and error compensation. It is the important step to improve the precision of machine tools.
数控机床的误差建模是进行机床运动设计、精度分析和误差补偿的关键技术，也是保证机床加工精度的重要环节。
The practical algorithm of sensitivity analysis of geometric programming is improved to reduce calculation error, and this method is applied in structure optimal design.
对使用几何规划进行灵敏度分析的实用算法进行了改进，提高了计算准确度，并把几何规划的灵敏度分析成功地用于结构优化设计中。
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