基于FPGA和DSP的遥测数据实时谱分析卡设计

为了实时分析遥测数据单位频带内信号谱信息随频率的变化情况，设计了一种遥测数据实时谱分析卡。设计采用FPGA+DSP系统架构，配合流水线作业的设计理念。振动信号功率谱密度（PSD）计算采用快速傅里叶变换法（FFT），冲击信号冲击响应谱(SRS)采用递归数字滤波法，极大降低运算量，缩短谱分析的时间，从而实现对谱信息的实时性分析。测试结果表明，该谱分析卡可以在9ms内完成对一路高频振动数据的处理，在67ms内完成对一路冲击数据的处理，设计具有良好的实时性、稳定性和扩展性，在实际应用中得到较好的效果。

The design of real-time spectral analysis card of remote measurement data based on FPGA and DSP

In order to analyze signal spectrum changes with the frequency information in units of frequency band in real-time remote measurement data, a real-time spectral analysis card of remote measurement data is designed. FPGA + DSP architecture with assembly line is adopted. The vibration signal power spectral density (PSD) calculated using the fast Fourier transform (FFT), and the shock signal Shock Response Spectrum Signal (SRS) calculated using recursive digital filter method, that reducing the amount of computation greatly, shorting the time of the spectral analysis greatly. Therefore, real-time spectral analysis information is achieved. Test results showing that the spectral analysis card can complete the high frequency vibration signal analysis within 9 ms, complete the shock signal analysis within 67 ms, and the Design has a good real-time performance, stability and scalability to give good results in practical applications.