Performance verification of semi-active and active impact control systems

A semi-actively controlled impact system is studied, which adjusts an impulse exerted by the external impact. Also, an active impact control system using a servo valve is introduced, and these performances are compared. The systems should respond to the extremely short impulse and control the impulse within a highly fast interval. Both the semi-active and the active control systems utilize an external orifice in the form of a proportional valve or a servo valve, which adjusts its opening area to control the pressure and piston displacement. These devices overcome the temperature and viscosity variations due to continuant operations, and keep the desired pressure difference and the displacement at a desirable level. In this work, two prototypic impact systems controlled by semi-active and full active operations are designed and manufactured. Through computer simulations and experiments, the possibility of controlling the pressure and displacement of an impact control system is verified.