Methods of an Alternating Biased Laser Gyro Resolution and Bandwidth Increase

摘要

Application of the laser gyro (LG) with an alternating bias for angular dynamic measurements runs into errors mainly caused by discrete output signal for level and time. We have developed a method of increasing LG resolution, based on formation of additional signals possessing a given phase shift with respect to two initial analog signals of variable frequency. The bandwidth of the LG is usually limited by twice the frequency of the alternating bias. This frequency is increased by further formation of time intervals symmetric with respect to the zeros of the "initial bias function" and representing the "inserted cycles" for determination of the increments of the LG output signal. The measurement error arising from the use of the developed method is estimated.