An Optical Gyroscope Based Technique for Calibrating Angular-Measuring Instrument

Abstract

This paper analyzes the error model of inductosyn install in an angular-measuring instrument, and then build up a test error system using the ultra-high precision Ring Laser Gyroscope to get the error of inductosyn. Compare the traditional Fourier Function calibrations and the linear interpolation calibrations methods; this paper presents a bit memory based method to calibrate the error of inductosyn in electrical resolution. As a result, after compensation, the inductosyn error is ±0.8 arcsecond, RMS of the error is less than 0.3 arcsecond.