Automatic control method and system for a piston gauge pressure

By employing fuzzy adaptive PID parameter tuning, dual-sensor monitoring, and dual closed-loop control, combined with low-pressure drive medium and high-frequency opening and closing solenoid valves, the problems of poor automation level and long control time of ultra-high pressure liquid piston pressure gauges have been solved, achieving efficient and stable pressure output.

CN122431433APending Publication Date: 2026-07-21BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
Filing Date
2026-03-06
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing ultra-high pressure liquid piston pressure gauges have poor automation levels and long control times, reducing the applicability of traditional pressure generation methods under high pressure.

Method used

By employing fuzzy adaptive PID parameter tuning, dual-sensor monitoring, dual closed-loop control loops, and dynamic adaptive algorithms, combined with low-pressure drive medium and high-frequency opening and closing solenoid valves, stable control and free rotation of the piston rod are achieved. The dual closed-loop control approximates the set pressure and suppresses jitter.

Benefits of technology

It achieves full-process automatic control of ultra-high pressure liquid piston pressure gauge, shortens control time, and ensures the accuracy and stability of pressure output, making it suitable for ultra-high pressure measurement needs in aerospace and other fields.

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Abstract

The application discloses a piston pressure gauge pressure automatic control method and system, the method comprises the following steps: inputting a set pressure, setting fuzzy adaptive PID initial parameters; starting a low-pressure driving medium, connecting the low-pressure end of a pressure increasing cylinder, generating ultrahigh pressure through the pressure increasing cylinder; using a pressure sensor and a displacement sensor to respectively monitor in real time and output two-way feedback signals; based on the two-way feedback signals and a low-pressure quick electromagnetic valve, a double closed-loop control loop is constructed, a dynamic adaptive closed-loop control algorithm is constructed by combining fuzzy adaptive parameter setting, amplitude limiting average filtering method and arithmetic average filtering method; the high-frequency opening and closing PID parameters of the low-pressure quick electromagnetic valve are set and optimized through the dynamic adaptive closed-loop control algorithm, the piston rod is controlled in an effective working position and is allowed to rotate freely, and the system output pressure matches the set pressure. The application has the advantages of ultrahigh pressure piston pressure gauge full-process automatic control, stable control of the piston rod rotation and shortened control time.
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