Employing Digital Filters in Order to Decrease Random Error in Laser Gyroscope and Pendulous Accelerometer Readings

Authors: Kolbas Yu.Yu., Kurdybanskaya A.I. Published: 13.04.2018
Published in issue: #2(119)/2018  
DOI: 10.18698/0236-3933-2018-2-27-40

Category: Instrument Engineering, Metrology, Information-Measuring Instruments and Systems | Chapter: Navigation Instruments  
Keywords: laser gyroscope, accelerometer, digital filter, random output error

The study deals with digital filters used to decrease random error in output of laser gyroscopes and pendulous accelerometers. We show that digital filtering of the output of a laser gyroscope featuring mechanical dither is highly efficient, this method being an easy and convenient way to eliminate the dither signal from the laser gyroscope readings. Filtering the output of laser gyroscopes featuring magneto-optic biasing makes it possible to reduce the maximum sampling error. In the case of pendulous accelerometers of various types, digital filtering helps to significantly decrease noises inherent in the accelerometer channel path, including pickup and noise in the analog-to-digital converter


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