Control method of valve electric actuator based on active disturbance rejection control algorithm

Abstract

The invention discloses a control method of a valve electric actuator based on an active disturbance rejection control algorithm. The method includes steps: establishing a motor output shaft model, and obtaining a dynamic equilibrium equation of a motor output shaft; establishing a gear deceleration mechanism model, and simplifying the model as a first-order linear system; establishing a screw rodtransmission mechanism model, and converting rotation motion to linear motion of an output shaft of the valve electric actuator; establishing an output shaft model of the valve electric actuator; establishing a load force model; adding a displacement sensor, and establishing a displacement sensor mathematical model of the valve electric actuator; and controlling a valve electric actuator system by employing the active disturbance rejection control algorithm according to a transfer function of the valve electric actuator. According to the method, the valve electric actuator is controlled by employing the active disturbance rejection control algorithm, the system can realize decoupling and weaken the dependence on the model by the algorithm, and the anti-interference capability of the system is improved.

Description

technical field [0001] The invention relates to the technical field of valve electric actuator control, in particular to a valve electric actuator control method based on an active disturbance rejection control algorithm. Background technique [0002] The early valve electric actuators received external valve opening or closing signals, and drove the valves to open or close through motors and reduction mechanisms. At present, more and more valve electric actuators are equipped with intelligent controllers, which can communicate with external devices in various forms to drive the valve to open or close, and at the same time control the valve to reach the specified position according to the external given position command. Location. With the continuous development of industrial control system technology and the continuous improvement of electrical automation level, valve electric actuators have become an irreplaceable link. Due to the restriction of the overall development l...

AI Technical Summary

Problems solved by technology

The control methods usually only have one or more of manual, 4-20mA, and switch value, lacking support for fieldbus

[0006] (3) Human-computer interaction is not friendly enough

Due to the simple control method and few settable parameters of the early valve electric actuators, the manufacturer did not regard human-computer interaction as a key research and development direction, resulting in simple and practical human-computer interaction, but not friendly enough

Images