傅里叶变换与拉普拉斯变换

FOURIER TRANSFORM AND LAPLACE TRANSFORM

傅里叶变换与拉普拉斯变换广泛应用于工程实际问题中，在测试技术及控制工程领域应用尤为广泛，搞清两者的应用特点对工程技术人员极其重要，文章通过例证介绍两者在工程应用上的特点，从概念上介绍了傅里叶变换与拉普拉斯变换的异同。

in some measurement and analysis for engineering, the Laplace transform was considered to be applied in settling the problem of input/output of linear constunt coefficient differential equation. The solutions include transient solution and stable solution. On the other hand, the Fourier transform was considered to be used in settling the problem of transient access. There is not suitable reason to explain it. It is easy to cause readers confusion about Fourier transform. This papor discusses the similarities and differences between Laplace transform and Fourier transform on concept. Their properties are analyzed, and their application example in engineering is presented.