FPGA-based design of laser gyro signal acquisition circuit

Abstract

With the continuous evolution of electronic technology, field-programmable gate array (FPGA) has demonstrated significant advantages in the realm of signal acquisition and processing, and signal acquisition plays a pivotal role in the practical applications of laser gyros. By analysis of the output signals from a laser gyro and an accelerometer, this paper presents a circuit design for signal acquisition of the laser gyro based on domestic devices. The design incorporates a finite impulse response (FIR) filter to process the gyro signal and employs a small-volume, impact-resistant quartz flexible accelerometer for signal aquisition. Simulation results demonstrate that the errors in X, Y, and Z axes fall within acceptable ranges while meeting filtering requirements. The use of FPGA for signal acquisition and preprocessing enhances configuration flexibility, which provides an idea and method for optimizing performance and processing signals in laser gyro applications.

Keywords

laser gyro / signal acquisition / field-programmable gate array(FPGA) / finite impulse response (FIR) filter / accelerometer

References

[1] CHOW W W, GEA-BANACLOCHE J, PEDROTTI L M, et al. The ring laser gyro. Reviews of Modern Physics, 1985, 57(1): 61-104.

[2] PESHEKHONOV V G. Gyroscopic navigation systems: Current status and prospects. Gyroscopy and Navigation, 2011, 2(3): 111-118.

[3] ZHAO Y C, CHENG J H, ZHAO L. Development status and future prospect of gyroscope in inertial navigation. Navigation and Control, 2019,19(s1): 189-196.

[4] ZENG W. Research on laser gyro adaptive algorithm and FPGA implementation. Guizhou: Guizhou University, 2022.

[5] LI Y, FU L, WANG L L, et al. Laser gyro temperature error compensation method based on NARX neural network embedded into extended Kalman filter//YAN L, DUAN H, YU X, et al.Advances in Guidance, Navigation and Control. Singapore: Springer Singapore, 2021: 3309-3320.

[6] LIANG X J, JI H X. Mechanical vibration suppression technology of laser gyroscope based on variance analysis. Machinery Design & Manufacture, 2022(5): 88-91.

[7] JI H T, MAO Y H, CHEN D B, et al. Fundamental principle, current status and prospect of ring laser gyroscope. Navigation and Control, 2022, 21(5): 221-240.

[8] YU H Y, GAO CN, WANG S L, et al. Research on the development direction and dynamics of optical gyro//Dynamic Development Direction of Inertial Technology Integration and Application of Frontier Technology and Inertial Technology, October 19, 2021, Dalian, China. Beijing: Chinese Society of Inertial Technology, 2021: 11.

[9] DU F. Research on design and alignment technology of land strapdown inertial navigation computer. Harbin: Harbin Engineering University, 2020.

[10] LIAO K, YANG J Z, JU L, et al. Implementation of a capacitive digital isolator based on OOK modulation. Microelectronics & Computer, 2022, 39(9): 125-132.

[11] FENG X L, DENG M Y, HE S F, et al. A self-zeroing V/F-F/V signal isolation transmission circuit. Experimental Technology and Management, 2023, 40(7): 79-85.

[12] LIN Y, YIN W W, HU G M. Design and implementation of an automatic measuring device for nonlinear parameters of vibrating beam accelerometer. Computer Measurement & Control, 2023, 31(3): 119-126.

[13] ZHU J X, WANG W F, HUANG S P, et al. An improved calibration technique for MEMS accelerometer-based inclinometers. Sensors, 2020, 20(2): 452.

[14] ZHANG Z H, LI J M. Comparative study of A/D and I/F data acquisition system based on quartz flexible accelerometer. Computer Measurement & Control, 2021, 29(5): 179-183.

[15] ZHOU Z K. Research on signal processing technology of high-precision low-frequency quartz flexure accelerometer. Harbin: Harbin Institute of Technology,2018.

[16] TANG H. Design and implementation of accelerometer I / F converter for strapdown inertial navigation system. Chongqing: Chongqing University of Technology, 2022.

[17] FAN Z F, LUO H, HU S M, et al. Angle random walk improvement analysis of body-dithered ring laser gyro based on lock-in error compensation. Infrared and Laser Engineering, 2023, 52(11): 3788.

[18] SUN W Q, CUI F Y, LIU J C, et al. System-level estimation and compensation of laser gyroscope sensitive axis dynamic offset. Chinese Journal of Inertial Technology, 2023,31 (7): 637-641.

[19] XIAO Z S, ZHANG H, ZHOU Y, et al. Research and development of resonant integrated optical gyroscope. China Laser, 2022,49 (19): 162-175.

[20] LI D, YU X D, WEI G, et al. Development status and trend of long-endurance laser gyro inertial navigation system. Journal of Optics, 2023,43 (17): 112-126.

[21] SHI Y F. Design of multi-channel data acquisition system based on PCI. Hangzhou: Zhejiang University, 2022.

[22] MA Z G. Design of multi-channel data acquisition system based on PXI bus. Electronic Design Engineering, 2006.

[23] WANG Y, JIN L, ZENG F H. Design of multifunctional FIR digital filter based on FPGA. Modern Electronics Technique, 2023, 46(18): 38-42.

[24] SONG Z D, WANG Z G, LI J R, et al. Design and implementation of FIR digital filter based on FPGA. LCD & Display, 2020,35 (10): 1073-1078.

[25] ZHANG Z P. Design of large range precision I / F chip based on CMOS. Guiyang: Guizhou University, 2023.