一、引言《信号与系统》作为电子信息类专业一门重要的专业基础课,是学习《数字信号处理》《自动控制原理》等后续课程的必备知识。该课程特点是理论性较强,数学推导较多,其中一些重要概念,比如卷积积分和卷积和,傅里叶变换、拉普拉斯变换及Z变换等非常抽象,学生接受起来比较困难。卷积积分在《信号与系统》课程中的引入,其最大的用途就是为了克服经典法在时域求解零状态响应时的局限性,丰富时域求解系统响应的方法。所以,其时域求解至关重要,该知识点也是《信号与系统》 I. INTRODUCTION “Signal and System”, as an important professional basic course of electronic information specialty, is a necessary knowledge to learn the follow-up course such as “digital signal processing” and “automatic control principle”. The course is characterized by strong theory and more mathematical derivation. Some of the important concepts such as convolution integrals and convolutions, Fourier transforms, Laplace transforms, and Z-transforms are very abstracted and students find it harder to accept . The biggest use of convolution integral in the course of signal and system is to overcome the limitation of the classic method in solving zero-state response in the time domain and enrich the method of time-domain solving system response. Therefore, its time domain solution is crucial, this knowledge point is also “signal and system”