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形状误差是指被测实际要素对理想要素的变动量。检测时,通常借助于模拟理想要素作为测量基准,与被测实际要素相比较,测得一系列相对变动值,从而得到被测要素的实际形状,再按误差评定原则求得误差值。测量形状误差时,测量基准与被测要素之间相对位置,应按最小条件原则尽量调整准确,避免影响测量精度和误判。同一被测要素的形状误差,往
Shape error refers to the actual element of the measured changes in the ideal element. When testing, usually with the help of the ideal element of the simulation as a measurement standard, compared with the measured actual element, a series of relative change values are measured to obtain the actual shape of the measured element, and the error value is obtained according to the principle of error assessment. When measuring the shape error, the relative position between the measurement reference and the measured element should be adjusted as accurately as possible according to the principle of minimum conditions to avoid affecting the measurement accuracy and misjudgment. The same measured element shape error, to