摘要
阶跃函数是一种特殊的连续时间函数,它在信号与系统分析以及电路分析中具有重要作用。在教科书中给出的若干种互有区别的阶跃函数定义,给教学和学生的理解造成了混乱。讨论了阶跃函数的定义,通过实例说明了阶跃函数在在t=0点的值应根据实际情况给出,分别可取0、1/2、1。可为讲授阶跃函数的定义提供一定的帮助。
Step function is a special continuous-time function which plays an important role in signal and system analysis and circuit analysis. Several different definitions of step function are given in textbooks and it makes confusion to the teaching of the function. Definition of step function is discussed in this paper. Examples are given to explain how to define the value of step function at t=0. It concludes that the value of step function at t=0 should be given through practical circuit analysis, as 0, 1/2 or 1. It is helpful for the teaching of step function.
出处
《电气电子教学学报》
2005年第2期38-39,44,共3页
Journal of Electrical and Electronic Education
关键词
阶跃函数
电路分析
信号
step function
circuit analysis
signal
