Title :
Design of ring laser gyroscope SINS data acquisition circuit
Author :
Sun, Feng ; Zhang, Lihua ; Zhang, Na ; Wang, Jianan
Abstract :
The measurements of dither offset frequency is used to reduce the impact of latching error for laser gyro. The method of linear phase low-pass filter is used to eliminate the dither impact and high-frequency measurement noise. Distributed arithmetic algorithm is used for the FIR filter, distributed arithmetic algorithm can complete a number of multiply operations efficiently by converting the multiply operation into the look-up table structure. The main functional circuits such as counters, digital signal processing algorithms are completed in FPGA, data acquisition circuit is designed with FPGA. PC/104 system is used as control module, whose driver is under DOS system. The data displays by interrupt. The experiments show that this acquisition card counts real-time and precise numbers. Taking PC/104 system simplifies the device complicacy.
Keywords :
data acquisition; distributed arithmetic; field programmable gate arrays; gyroscopes; low-pass filters; ring lasers; table lookup; DOS system; FIR filter; FPGA; SINS data acquisition circuit; counters; digital signal processing algorithms; distributed arithmetic algorithm; high-frequency measurement noise; laser gyro latching error; linear phase low-pass filter; look-up table structure; ring laser gyroscope; Arithmetic; Circuits; Data acquisition; Finite impulse response filter; Gyroscopes; Laser noise; Optical design; Ring lasers; Signal processing algorithms; Silicon compounds;
Conference_Titel :
Mechatronics and Automation, 2008. ICMA 2008. IEEE International Conference on
Conference_Location :
Takamatsu
Print_ISBN :
978-1-4244-2631-7
Electronic_ISBN :
978-1-4244-2632-4
DOI :
10.1109/ICMA.2008.4798898
