随着计算机技术及仿真工具软件的快速发展,虚拟实验已成为实验教学的重要模式,尤其在信号与系统这一复杂而抽象的学科中,虚拟仿真实验更是展现出了其独特的优势。本文旨在探讨信号与系统虚拟仿真实验的设计、实现及其在教学中的应用效果,通过分析传统实验教学的局限性,提出基于LabVIEW软件的滤波器虚拟实验案例的设计与实现过程,首先通过信号生成函数分别输出正弦波和噪声信号,然后将噪声与正弦波叠加,再通过滤波器从叠加有噪声的信号中滤出正弦波信号。最后利用FFT函数分析正弦波的频谱特性。仿真结果表明:基于LabVIEW软件实现的滤波器能够帮助学生分析理解其滤波特性,满足信号与系统实验教学的需求。With the rapid development of computer technology and simulation tool software, virtual experiments have become an important mode of experimental teaching, especially in the complex and abstract discipline of signals and systems, where virtual simulation experiments have demonstrated their unique advantages. This article aims to explore the design and implementation of virtual simulation experiments for signals and systems, as well as their application effects in teaching. By analyzing the limitations of traditional experimental teaching, a filter virtual experiment case based on LabVIEW software is proposed for the design and implementation process. Firstly, a sine wave and noise signal are output separately through a signal generation function. Then, the noise is superimposed on the sine wave, and the sine wave signal is filtered out from the superimposed noisy signal through a filter. Finally, the FFT function is used to analyze the spectral characteristics of the sine wave. The simulation results show that the filter implemented based on LabVIEW software can help students analyze and understand its filtering characteristics, meeting the needs of signal and system experimental teaching.
