Principal properties and experiments of hydraulic actuator for robot

Although the applications of hydraulic actuators to robotic systems has grown, it is difficult to get the customized components for the research platform. High bandwidth with higher force and torque compared to the electric motor in respect of size and weight has unique area as an actuator for robots. As the easy-getting products, the nozzle flapper type servo valve and actuators has been introduced and the test results for getting technical data for control are shown.