圆感应同步器扇区刻划误差的测试方法

Measurement method for sector etching error of round inductosyn

为了进一步提高圆感应同步器测角系统的精度,首先,对圆感应同步器测角系统的误差源进行进一步挖掘,提出圆感应同步器扇区刻划误差的概念。然后,将扇区刻划误差项引入到圆感应同步器测角系统的误差模型之中,建立更为完善的测角系统的误差模型,并且对误差源在有限检测样本空间的正交性与耦合性进行分析,据此设计不同起测角度的组合测试方法对误差项进行分离。最后,采用正23面棱体—自准直仪检测系统与391齿多齿分度台—平面反射镜—自准直仪检测系统分别对圆感应同步器测角系统的角位置误差进行检定,测试结果的一致性验证了误差分离方法的正确性。

In order to improve the accuracy of round inductosyn angle measuring system a new error source of the angle measuring system was discovered the concept of sector etching error in the round in ductosyn angle measuring system was proposed then the sector etching error was introduced into the error model of the round inductosyn angle measuring system and a perfect angle measuring system error model was established.The orthogonality and coupling characteristics among the error sources in the limited sampling space were analyzed and a combination test method with different starting angles was designed to separate the error sources.Finally correctness of the method was proved by comparing the angular posi tion error measurement results with the 23 mirrored polygon autocollimator measurement system and with the 391 tooth indexing table reflected mirror autocollimator measurement system.