A hydraulic vibration system with wide frequency range was designed by using the pulsation generator

in order to study the dynamical characteristics of the full scale propellant feed system after the pump in the liquid rocket engine

and the cold fluid tests and data analysis were conducted. Within the range of 0-1200Hz

the hydraulic vibration system can create pressure fluctuation signal with amplitude more than 1.5MPa and high signal-to-noise ratio. The target of wide frequency range and high amplitude was reached. By controlling the electric motor revolving speed

the controlled excitation frequency can be realized to satisfy different frequency actuating methods. Increasing the system inlet steady pressure can improve the hydraulic vibration signal amplitude. By appropriately distributing local resistors

the hydraulic vibration signal amplitude and signal-to-noise ratio can be improved within widefrequency range.