Fluid feed apparatus and method

A fluid feed method using a fluid feed apparatus comprising:

• a suction hole and a discharge hole for a fluid;
• a fluid transfer part provided between a rotor and a stationary member containing the rotor;
• a shaft coupled with the rotor;
• a rotation actuator for rendering a relative rotating motion between the shaft and the stationary member in a surface perpendicular to an axis of the shaft;
• a driving power supply for the rotation actuator;
• a rotating motion control unit for the rotation actuator;
• a swing actuator for rendering a relative swinging motion between the shaft and the stationary member;
• a driving power supply for the swing actuator;
• and a swinging motion control unit for the swing actuator,
• the method comprising steps of:
• rotating the shaft by the rotation actuator and swinging the shaft by the swing actuator;
• and
• performing synchronous control by the rotating motion control unit and the swinging motion control unit so that the rotating motion and the swinging motion are synthesized to implement a revolving motion.