If, however, the interval between such step inputs is decreased so that the system never has time to reach the corresponding steady-state, the step representation and Laplace domain are no longer adequate.

• 但是，如果减小这些阶跃输入的间隔，系统没有足够的时间来到达下一个相应的稳态，则阶跃响应以及拉普拉斯域就显得不合适。