Aiming at the key technology problem which the hydraulic pulse produced by hydraulic impulse testing equipment reliably and be controlled, according to pipe-cubage model, ramp model was established and the response express of ramp input was deduced for the first time. The computation results reveal that the maximal excess is 63.7% in ramp model. Based on step and ramp model, ramp input can be treated as step input when the time of ramp input no more than tenth of system oscillation periods. Digital simulations of step and ramp model were carried out through Matlab software and electro-hydraulic assimilation method, and the simulation results show that standard pulse can be produced by means of adjusting system parameters, such as cubage, length of pipe and diameter of pipe and etc.
