Control device of electro-hydraulic proportional displacement controller and control method thereof

By establishing the relationship A between the input signal and the output signal, and using a segmented PID adaptive algorithm to adjust the initial output signal, the problems of low control accuracy and insufficient stability of the electro-hydraulic proportional controller are solved, and high-precision and stable output signal control is achieved.

CN115807806BActive Publication Date: 2026-07-21JIANGSU HENGLI HYDRAULIC TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU HENGLI HYDRAULIC TECH CO LTD
Filing Date
2022-12-29
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing electro-hydraulic proportional controllers suffer from low control accuracy, especially in ensuring output stability and precision when there is no overshoot.

Method used

A control method using an electro-hydraulic proportional motion controller is adopted. By establishing the relationship A between the input signal and the output signal, and using a segmented PID adaptive algorithm to adjust the initial output signal, including initialization, multi-point fitting and PID adjustment, the control accuracy and stability are ensured.

Benefits of technology

It significantly improves the control accuracy and output signal stability of the electro-hydraulic proportional motion controller. The control accuracy can reach the microampere level and the error is stable within 1%, which improves the problems of large output signal fluctuation and weak anti-interference ability.

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Abstract

The application discloses a control device and a control method of an electro-hydraulic proportional movement controller, and the method comprises the following steps: initializing the electro-hydraulic proportional movement controller; establishing a change relation A between input signals and output signals of the electro-hydraulic proportional movement controller; collecting actual input signals, and forming an initial output signal OUT1 of the electro-hydraulic proportional movement controller according to the change relation A; and adjusting the initial output signal OUT1 by using a sectional PID adaptive algorithm to obtain a final output signal OUT2. By establishing the change relation A and adjusting the initial output signal OUT1 by using the sectional PID adaptive algorithm, the control precision of the output signal can be obviously improved, and the problems of the traditional controller, such as large fluctuation of the output signal and weak anti-interference ability, are solved.
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