The Characteristics of a New Type of Integrated Electric-pneumatic Hybrid Actuator

According to the characteristics of electric actuator and pneumatic system, a new type of ingetrated electric- pneumatic hybrid actuator is designed. It has the advantages of high positioning accuracy and strong anti-interference ability of the electric actuator, as well as large output force and clean working medium of the pneumatic servo system. The problem of cylinder disturbance in the initial stage of the motion of the new actuator is solved through the research. By adding correction unit, the motion of the hybrid actuator is more stable and reliable. The following characteristics of the new actuator are obtained through simulation analysis and experimental research on the integrated electro-pneumatic hybrid actuator. The load bearing capacity of the new actuator is far more than that of its electric actuator, and the positioning accuracy is up to the position control accuracy of the electric actuator, and the cylinder can play a very good role in facilitating. At the same time, combined with its characteristics, the electric-pneumatic hybrid actuator is applied to the RCM ( Remote Center-of-Motion ) of the medical surgery assistant robot.