Abstract
To make stored potential energy available in milliseconds is a physical advantage of hydraulics. Acceleration of masses using high momentary power by installing small average power can only be achieved with hydraulic systems. Two newly developed practical applications will be explained.
A real crash system for automotive testing makes over 500kW available with 30 kW installed power. Acceleration and speed is achieved by secondary controlled hydraulic rotary unit.
An inverse crash system for simulated automotive testing makes 40.000 kW available with an installed power of 100kW. The acceleration profile is achieved by a linear servo unit using a four stage servo valve.
