Abstract:

In this paper， taking the pedestrian protection test system launcher as the research object and based on the high speed hydraulic ejection control technology ， the structure of the launch device， as well as structure design of the high speed hydraulic cylinder and the control principle of high speed hydraulic launching and electrical control system is introduced respectively. Finally， verification tests are carried out for various impact models. The test results show that the launch velocity is stable， accurate and reliable， which meets the test requirements. The proposed device can alleviate the situation that the domestic pedestrian protection test equipment is mainly dependent on import， which forms a proprietary technology of using high-speed hydraulic cylinder for pedestrian protection test equipment.

Key words: pedestrian protection, high speed hydraulic cylinder, ejection control, high frequency servo valve, high speed hydraulic servo control