Application of Oversampled A/D Converter in Low-cost Strapdown Inertial Navigation System

In the strapdown inertial navigation system (SINS) the inertial sensors mounted directly on the vehicle, have large scales inputs. Even in the low-cost SINS the gyroscopes have over 19 bits scales inputs. Conventional A/D converters only have 12~14 bits, can not meet the need. The oversampled A/D co...

Full description

Saved in:
Bibliographic Details
Main Authors: Tan Hongli, Huang Xinsheng, Yue Dongxue
Format: Conference Proceeding
Language:English
Subjects:
A/D conversion
Filtering
Gyroscopes
Inertial navigation
integral filtering
Large-scale systems
Noise reduction
oversampling
Quantization
quantization errors
Sensor systems
Signal analysis
Silicon compounds
strapdown inertial navigation system
Vehicles
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the strapdown inertial navigation system (SINS) the inertial sensors mounted directly on the vehicle, have large scales inputs. Even in the low-cost SINS the gyroscopes have over 19 bits scales inputs. Conventional A/D converters only have 12~14 bits, can not meet the need. The oversampled A/D converter can reduce the quantization errors and improve the scales to fit for the low-cost SINS. The effect of oversampling was analyzed, not only in reducing quantization errors and signal noise, but also in improving integral filtering precision. The DPS+FPGA structure was used to collect the six signals of gyros and accelerometers in high speed and parallel mode. The experiment results show that, the low-cost SINS using the oversampled A/D converter have good performance in common integrate navigation applications.
DOI:10.1109/ICEMI.2007.4351231