Variable-section air pressure actuator and control system and control method thereof

The invention discloses a variable-section air pressure actuator and a control system and method thereof.The variable-section air pressure actuator at least comprises a first air pressure cylinder, a second air pressure cylinder and a third air pressure cylinder, the cylinder body ends of the first air pressure cylinder, the second air pressure cylinder and the third air pressure cylinder are all connected with a base, and the rod ends of the first air pressure cylinder, the second air pressure cylinder and the third air pressure cylinder are all connected with a top cover; the first control branch, the second control branch and the third control branch are communicated with the main reversing valve, the load connecting piece is connected with the top cover, the first pneumatic cylinder, the second pneumatic cylinder and the third pneumatic cylinder are arranged in parallel, and the control system has the advantages of being high in driving efficiency, low in energy consumption, convenient to adjust and the l