An electro-hydraulic actuator system based on electromagnetic proportional valve and its displacement control method
An electromagnetic proportional valve and electro-hydraulic actuator technology, which is applied to fluid pressure actuation system components, servo meter circuits, servo motors, etc., can solve the problems of low control accuracy and slow response, and achieve high dynamic response and low tracking error. , the effect of precise control at low position
Active Publication Date: 2022-07-12
BEIHANG UNIV
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[0003] Aiming at the application requirements of electro-hydraulic actuators, the present invention proposes an electro-hydraulic actuator system based on electromagnetic proportional valves and its displacement control method. The fluid flow direction is controlled by a three-position four-way electromagnetic valve, a mathematical model is established, and PID control is adopted. The actuator can accurately control the displacement of the hydraulic actuator, thus effectively solving the problems of low control accuracy and slow response of the existing electro-hydraulic actuator position control system
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[0034] In order to facilitate the understanding and implementation of the present invention by those of ordinary skill in the art, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:
[0035] like figure 1 As shown, the electro-hydraulic actuator system based on the electromagnetic proportional valve of the present invention includes: a three-position four-way electromagnetic proportional valve 1, a positive displacement pump 2, a double-acting hydraulic piston cylinder 3, a position sensor 4 and a fuel tank 5; The electromagnetic proportional valve 1 is connected to the double-acting hydraulic piston cylinder 3, the positive displacement pump 2 and the oil tank 5 respectively through the hydraulic pipeline; the position sensor 4 is connected to the piston of the double-acting hydraulic piston cylinder 3, and the double-acting hydraulic piston cylinder is measured. Actual position of the piston...
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The invention proposes an electro-hydraulic actuator system based on an electromagnetic proportional valve and a displacement control method thereof. The three-position four-way electromagnetic valve is used to control the fluid flow direction, a mathematical model is established, and a PID controller is used to accurately displace the hydraulic actuator. Therefore, the problems of low control precision and slow response of the existing electro-hydraulic actuator position control system are effectively solved, and the precise position control of the electro-hydraulic actuator with high dynamic response and low tracking error is realized.
Description
technical field [0001] The invention relates to the field of electro-hydraulic actuators, in particular to a method for precise position control of an electro-hydraulic actuator. Background technique [0002] Electro-hydraulic actuator systems are widely used in various industrial fields. The system is characterized by the ability to transmit large forces and a high dynamic response, combined with high durability and a high power-to-weight ratio, capable of delivering large forces at high speeds in a relatively small size. In recent years, the high-precision position control of electro-hydraulic actuator systems has received extensive attention. Various electro-hydraulic actuator systems and their control schemes have been widely used in mobile equipment, machine tools, plastics industry, automobile inspection, mining and oil exploration. and other fields. SUMMARY OF THE INVENTION [0003] In view of the application requirements of electro-hydraulic actuators, the presen...
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IPC IPC(8): F15B9/09F15B21/02
CPCF15B9/09F15B21/02F15B2211/6656
Inventor 张辉张思龙
Owner BEIHANG UNIV