摘要
设计一个高精度频率采样系统对惯性导航系统中的3路石英振梁加速度的信号进行快速采集.首先分析振梁加速度计的测量原理和误差来源,然后采用基于FPGA的SOPC技术与Verilog语言编程实现数据采集,最后在实际导航系统中进行了大量的试验,结果表明,系统以100 Hz运行稳定,采样精度达到了1 mg.
A high-precision frequency sampling system for rapid acquisition of a 3-way quartz vibration beam accelerometer （VBA） in an inertial navigation system was designed. The frequency measuring principle and its accuracy were analyzed first. Then the system-on-a-programmable-chip（SOPC） technology and VerilogHDL based on FPGA were used to realize data acquisition. Finally a large number of experiments in the actual navigation system were carried out. The results show that the system runs stably at 100 Hz, and the sampling accuracy reaches 1 mg.
出处
《应用科技》
CAS
2012年第3期61-65,共5页
Applied Science and Technology
基金
中俄科技合作专项基金资助项目(2010DFR80140)
中央高校基本科研业务费专项基金资助项目(HEUCF110404)
关键词
惯性导航
石英振梁加速度计
数据采集
等精度测频
FPGA
inertial navigation
quartz vibration beam accelerometer
data sample system
equal-precision frequency measurement
FPGA
