一种基于LabVIEW的频率响应分析仪设计

A Design of Frequency Response Analyzer Based on LabVIEW

频率响应分析作为一种系统分析方法有着广泛的用途。设计了一种基于LabVIEW的频响分析系统,相对于传统的频谱分析仪,它具有性能价格比高、功能覆盖面广、系统可升级性好等优点。介绍了该分析仪的软、硬件结构,详述了其程序实现方法和程序框架,并与标准仪器进行了对比分析。经实验测试,该频谱分析仪的平均幅值误差达到0.06dB,平均相位误差达到0.09°,分析精度高,性能可靠。

Frequency response analysis has a wide usage as a method of system analysis. A frequency response analyzer based on LabVIEW is introduced in this paper. Compared with the traditional spectrum analyzer, it has many advantages such as a higher ratio of performance to price, wide usage, easy upgrade in performance, etc. The software and hardware structures of a frequency response analyzer are given, and its program realization is expounded in detail. Comparison with standard instrument has been carried out. Experiments show that the average amplitude error of this analyzer gets to 0.06 dB and the average phase error reaches 0.09°, which proves the analyzer credible in both precision and performance.