The analysis of step signal action on coupled resonant circuit is a difficult part in circuit analysis.

Based on the simple linear time invariant second-order system\'s response of bevel-table signal,this paper set up a mathematic connection between the rising time of bevel-table signal and some characteristic values (for example,first peak time and shake period) on the response graph and presents a method of calculating the rising time of step signal when declining shake appears,.

Based on the method of generalized function,this paper mainly revises the Fourier transform formulation of index signal and index reduction,explores the continuation effect of step signal in the signal processing method,i.

In this paper, a decentralized identification technique is presented, which can only use step signals as input signals and implement the identification of every subprocess in corresponding to the local unit.

Using the step signals of set-points changes in the course of optimizing control as the input signals to identifying the steady-state models is good identification technique and reduces the disturbed to the processes.

In this paper, a method based on the ration of migration time aided by the sudden change in electric current (RM ASCC) is introduced for improving the reproducibility of separation results.