Complementary frequency electromagnetic gyroscope

Zhendong Xu,Yingchun Zhang,Guodong Xu

doi:10.1063/5.0051067

Abstract

This paper proposes a complementary frequency electromagnetic gyroscope. In this gyroscope, a voltage-controlled oscillator (VCO) is applied to generate complementary frequency signals and the angular rate detection is realized based on a phase-locked loop. The complementary frequency electromagnetic gyroscope can be fully realized by micro-electronic technology, which is beneficial to the miniaturization of the angular rate measurement system and has a wide application prospect. The complementary frequency electromagnetic gyroscope extends the application of the Sagnac effect and replaces the optical signal with the electromagnetic pulse signal. It can make full use of the advantages of microelectronic technology and microwave technology to realize the miniaturization of measuring components and even realize the system on a chip. In this paper, the mathematical model of the complementary frequency electromagnetic gyroscope is established and verified by simulation analysis. Theoretical analysis shows that the measured angular rate is proportional to the relative frequency difference of complementary VCO output. The simulation results indicate that the sensitivity of the complementary frequency gyroscope is 1 × 10−5 rad/s and is insensitive to noise. When the signal-to-noise ratio is lower than 0 dB, the gyroscope still has good angular rate measurement accuracy.

Highlights

A laser gyroscope and a fiber-optic gyroscope (FOG) are both based on the Sagnac effect to realize the angular rate measurement.1,2 These gyroscopes rely on the development of laser and optical fiber and require high precision optical signal measurement and processing
We extend the application of the Sagnac effect21–23 and use the electromagnetic pulse signal to replace the optical signal in the FOG
Since the relative angular rate is proportional to relative difference frequency in the complementary frequency electromagnetic gyroscope, any noise introduced to the phase-locked loop (PLL) may contribute to the change in the frequency and affect the performance of the gyroscope, so the relative frequency instability has to be evaluated in order to estimate the random walk coefficient

Summary

INTRODUCTION

A laser gyroscope and a fiber-optic gyroscope (FOG) are both based on the Sagnac effect to realize the angular rate measurement. These gyroscopes rely on the development of laser and optical fiber and require high precision optical signal measurement and processing. A laser gyroscope and a fiber-optic gyroscope (FOG) are both based on the Sagnac effect to realize the angular rate measurement.. A laser gyroscope and a fiber-optic gyroscope (FOG) are both based on the Sagnac effect to realize the angular rate measurement.1,2 These gyroscopes rely on the development of laser and optical fiber and require high precision optical signal measurement and processing. The proposed gyroscope based on the Sagnac effect realizes angular rate sensitivity mainly by the phase interference of two beams of light in opposite directions in a closed optical ring. It is expected that a method of the angular rate measurement can be obtained based on microelectronics and microwave technology to realize miniaturization of the gyroscope. We propose a measurement method of the angular rate, establish a mathematical model, and verify the theory by simulation

THEORETICAL MODEL OF ANGULAR RATE MEASUREMENT

THEORETICAL ANALYSIS OF COMPLEMENTARY FREQUENCY GYROSCOPE

SIMULATION OF COMPLEMENTARY FREQUENCY GYROSCOPE

CONCLUSIONS