piston-error 位移偏差
The phase difference caused by piston error translated with the tiled-grating compressor, the focal spot was affected by both non-integral number of grating space and out-of-plane piston error.
位移偏差引入的相位随着拼接光栅压缩器传递，其对远场焦斑的影响，取决于每片子光栅的非整数倍光栅常数的横向位移偏差和纵向位移偏差的综合作用。
The Statistical analysis of piston ring tracer cutting errors shows that there is a systematic error in the tracer cutting.
对活塞环仿形车削误差的统计分析表明：靠模仿形加工中存在系统误差。
The simulation results show that the tracking error of middle-convex and varying ellipse piston linear servo drive system can be reduced effectively by this method.
仿真结果表明，采用这种控制策略可以十分有效地减小中凸变椭圆活塞直线伺服驱动系统的跟踪误差。
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