A method and device for switching between two hydraulic sources in an aircraft hydraulic system

By employing a dual-source oil switching control method for aircraft hydraulic systems, and comprehensively judging oil source and brake pressure signals, the misjudgment problem of fly-by-wire brake control systems is solved, achieving stable and reliable braking systems and reliable oil source switching.

CN120663884BActive Publication Date: 2026-07-21XIAN AVIATION BRAKE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN AVIATION BRAKE TECH
Filing Date
2025-06-19
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing electronic brake control systems are prone to misjudgment when the oil pressure is unstable or abnormal, which affects the function of the brake system.

Method used

The aircraft hydraulic system adopts a dual-path oil source switching control method. By acquiring the aircraft status, judging the braking status, and collecting the working status of the dual-path oil source switching device, the oil source pressure and braking pressure signals are comprehensively judged to ensure that the channel switching is performed when the preset conditions are met.

Benefits of technology

It improves the stability and reliability of the brake control system, avoids misjudgment of the brake system, and ensures timely switching to another system when any oil source fails, thus guaranteeing the reliability of the hydraulic system's oil source.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120663884B_ABST
Patent Text Reader

Abstract

The application discloses a kind of aircraft hydraulic system two-way oil source conversion control method and device, specifically related to the field of brake control.It includes: obtaining the state of the aircraft, when determining that the aircraft is in the brake state, issue an open command to the current channel of the two-way oil source conversion device;Collect the working state of the current channel of the two-way oil source conversion device, when determining that the working state is normal, turn on the current channel;Collect the oil source start state signal and the oil source working state signal of the current channel, when determining that the oil source start state signal and the oil source working state signal are valid, collect the oil source pressure voltage signal and the brake pressure signal;When determining that the oil source pressure reaches the first preset condition, and the brake pressure reaches the second preset condition, switch the current channel.Based on the above method, when any one of the system oil sources fails, it can be switched to the other output in time, ensuring that the system oil pressure input to the anti-skid brake control system is normal.
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