Comparative Assessment Of Gyro Parameters Based On Ramp (V2 Pi) And Bias (V Pi/2) Voltage Variations In Dclifog System

Fibre-optic gyro is an inertial rotation sensor, thus, which determines the rate-of-turn based on the well-known Sagnac-effect. The attainment of inertial grade performance mainly concentrates on an Interferometric Fibre-optic Gyro with the closed-loop operation, but there are several drawbacks existing in the analogue interferometric fibre-optic gyro system. Consider, the Digital Closed-loop Interferometric Fibre-optic Gyro system is mainly engaged with the biasing signal frequency and the ramp signal that is V2 pi voltage of the multi-functional integrated optic chip. The feedback signal uses a digital phase ramp voltage to neutralize the gyro output. The peak-to-peak voltage of the biasing signal that can be V pi/2 is equal to one-fourth of the V2 pi, peak-to-peak voltage of the ramp signal inclines to multi-functional integrated optic chip for intensity modulation. If there is a slight difference occurred in the ramp and biasing voltages, then there is a change found in the performance of gyro. This paper addresses the comparative exploration made on gyro performance by evaluating its parameters in the following three cases: (i) V pi/2 kept stable and V2 pi changed, (ii) V2 pi kept stable and V pi/2 changed, (iii) Change both V2 pi and V pi/2 simultaneously. The performance of gyro was explained from the obtained result concerning with bias-stability and scale-factor linearity.