Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: 11, Pages: 1-10
G. Harish Babu1*, A. Venkata Anuhya2 and N. Venkatram3
1Department of ECE, Aurora’s Scientific & Technological Institute, Hyderabad - 501301, Telangana, India; [email protected] 2Department of ECE, St.Mary’s Women’s Engineering College, Guntur - 522017, Andhra Pradesh, India; [email protected] 3Department of ECM, K L University, Guntur - 522502, Andhra Pradesh, India; [email protected]
*Author for Correspondence
G. Harish Babu Department of ECE, Aurora’s Scientific & Technological Institute, Hyderabad - 501301, Telangana, India; [email protected]
Objective: Interferometric Fiber optic gyroscope (IFOG) is an angular rate sensor which plays a crucial role in inertial navigation system. Measuring the angular rotation rate can be done in two approaches namely open loop & closed loop. Designing and implementation of these methods using a simulation tool provides faster & accurate results.This paper presents a novel Simulink model implementation of Open loop & Closed loop Fiber optic gyroscope for the measurement of rotation rate. Method/Analysis:The gyroscope with each optical component is treated as a black box having M input and N output ports that are represented mathematically with its transfer function by connecting output to its input. This methodology is very efficient for finding the calibration & phase difference between the co-rotating & counter rotating beams. Findings:There are two major contributions in this paper. Firstly, the physical model of open loop FOG is built in Simulink model & angular rate is measured. The signal processing scheme of modulation and demodulation techniques for finding the rotation rate can also be analyzed mathematically. In second, to improve the accuracy and stability the feedback loop is very important to improve the gyro performance which can also be analyzed with different rotation rates. Experimental setup shows that an improved result is obtained in determining the direction of rotation and accuracy of the proposed model.
Keywords: Black Box, Closed Loop, InterferometricFiber Optic Gyroscope (IFOG),Open Loop, Simulation, Simulink Model, Transfer Function
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