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

摘要：

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.

关键词： oversampling A/D conversion quantization errors strapdown inertial navigation system integral filtering

作者: Tan Hongli Huang Xinsheng Yue Dongxue

作者单位: College of Mechatronic Engineering and Automation,National University of Defense Technology,Changsha 410073,China

会议类型: 国际会议

会议名称: 第八届国际电子测量与仪器学术会议(Proceedings of 2007 8th International Conference on Electronic Measurement & Instruments)

会议地点: 西安

会议语种:英文

在线出版日期: 2007-08-16（万方平台首次上网日期，不代表论文的发表时间）