工程实践背景下的周期性方波信号分解与合成

Decomposition and Synthesis of Periodic Square Wave Signal under the Background of Engineering Practice

在分析了周期性信号的傅里叶级数分解的意义和方法的基础上,本文设计了方波信号分解与合成的硬件电路系统,整个电路由方波振荡电路、分频与滤波电路、信号调理电路、移相电路、信号叠加电路等电路构成。电路系统实现了由基波、三次谐波和五次谐波合成近似的方波,效果良好。实践证明,学生通过动手操作加深了对周期性信号分解与合成的理解,培养了学生的工程实践能力。

On the basis of analyzing the significance and method of Fourier series decomposition of periodic signal,the hardware circuit system of square wave signal decomposition and synthesis is designed in this paper..The whole circuit is composed of square wave oscillation circuit,frequency division and filtering circuit,signal conditioning circuit,phase-shifting circuit,signal superposition circuit and so on.The circuit system realizes the approximate square wave composed of fundamental wave,third harmonic and fifth harmonic,and the effect is good.Practice has proved that students deepen their understanding of periodic signal decomposition and synthesis through hands-on operation,and cultivate their engineering practice ability.