基于NiosII的光纤捷联惯导系统数据采集模块设计

Data Acquisition Module Design of Fiber Strapdown System Based on Nios II

摘要:

针对光纤捷联惯导系统中采用传统技术的导航计算机需重复设计且效率低的现状,提出了一种基于Nios II的光纤捷联惯导数据采集及预处理实现方案;运用verilog HDL语言完成了对光纤捷联惯导系统中挠性加速度计和光纤陀螺仪的数据采集功能IP核设计,采用SOPC(可编程片上系统)技术定制了Nios II软核处理器,并实现16阶FIR低通滤波器的设计;通过对捷联惯导系统的静态采集实验,验证了数据采集功能IP核的准确性和FIR低通滤波器滤除部分噪声的有效性。

Abstract:

A kind of data acquisition and preprocessing scheme based on Nios II processor that is used in fiber strapdown inertial navigation system is put forward, with the situation of repetitive design and low efficiency exists in the traditional design of navigation computer in the inertial navigation system. The IP core of data acquisition of fiber optic gyroscope and accelerometer is designed using verilog language, and with the use of SOPC (system on a programmable chip) technology, the Nios II softcore processor is customized, and the FIR low-pass filter of 16 order is designed. Through the static experiments of fiber strapdown inertial navigation system, the results show the accuracy of IP core of data acquisition and the validity of FIR low-pass filter.