轴系倾角回转误差中一次谐振的分离方法

发布时间：2018-03-26 09:22

本文选题：回转误差　切入点：一次谐波　出处：《哈尔滨工业大学学报》2017年10期

【摘要】：为更加准确地评定轴系的倾角回转误差,首先推导了轴系倾角回转误差、平面反射镜和自准直仪的安装误差与自准直仪测量数据之间的关系,指出平面反射镜的安装误差在自准直仪的二维读数中为正交一次谐波,然后分析了一次谐振运动误差的形成机理,其在自准直仪的读数中表现为同相一次谐波.针对二维数据中的一次谐波,设计了同相和正交一次谐波的分离方法,扣除了由平面反射镜的安装误差引起的正交一次谐波误差,保留了轴系倾角回转误差中的一次谐振成分,从而改进了轴系倾角回转误差的数据处理方法.最后,通过改变平面反射镜的安装误差,并且对同一轴系的倾角回转误差进行测试,实验结果表明,从两次测试数据中所分离出来的一次谐振误差具有一致性,从而证明了该分离方法的正确性.并且在数据处理过程中只扣除了平面反射镜安装误差引起的正交一次谐波,保留了同相的一次谐振误差项.从最终实验数据可以看出改进后的倾角回转误差数据处理方法更加的合理和精确.
[Abstract]:In order to evaluate the inclination rotation error of shaft system more accurately, the relationship between the angle rotation error of shaft system, the installation error of plane reflector and autocollimator and the measured data of autocollimator is deduced. It is pointed out that the installation error of the plane mirror is orthogonal first harmonic in the two dimensional reading of the autocollimator, and then the forming mechanism of the first harmonic motion error is analyzed. For the first harmonic in the two-dimensional data, the separation method of the in-phase and the orthogonal first harmonic is designed, and the orthogonal first harmonic error caused by the installation error of the plane mirror is deducted. The primary resonance component of shaft inclination rotation error is retained, and the data processing method of shaft inclination angle rotation error is improved. Finally, by changing the installation error of plane mirror, The error of inclination angle rotation of the same shafting is tested. The experimental results show that the primary resonance error separated from the two test data is consistent. It is proved that the separation method is correct, and the quadrature first harmonic caused by the installation error of the plane reflector is only deducted in the data processing. The primary resonance error term of the same phase is retained. From the final experimental data, it can be seen that the improved data processing method of inclination angle rotation error is more reasonable and accurate.
【作者单位】：哈尔滨工业大学空间控制与惯性技术研究中心;
【基金】：国家重大科学仪器设备开发专项基金(2013YQ310737)
【分类号】：TG80

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