A double-channel redundant control method of a diving bell hoisting hydraulic system

By pre-calculating and establishing the target compensation pressure of the second redundant channel in the diving bell launching system, the response delay problem during the switching of dual-channel redundant control was solved, and the stable tension of the launching cable during channel switching was achieved, thus improving the operational stability of the diving bell in complex sea conditions.

CN122355174APending Publication Date: 2026-07-10CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719
Filing Date
2026-05-12
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

The existing diving bell deployment system has a response delay when switching between dual-channel redundant control, which causes the deployment cable to be unable to maintain a constant tension during wave compensation, reducing the stability of the diving bell deployment operation in complex sea conditions.

Method used

By acquiring the operating data of the diving bell launching system, the target compensation pressure of the second redundant channel is calculated in advance, and this pressure is established before the first main control channel is closed. This allows the second redundant channel to take over the launching action in a timely manner, shortening the pressure gap during the main/backup switchover process and maintaining the stable tension of the launching cable.

Benefits of technology

It effectively shortens the pressure gap period during channel switching, reduces tracking errors, and improves the stability of the diving bell during hoisting operations in complex sea conditions.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application relates to the field of diving bells and discloses a dual-channel redundant control method for a diving bell hoisting hydraulic system. The method includes: acquiring operational data of the hoisting system in the environment where the diving bell is located; obtaining the pressure drop rate of the first main control channel based on the valve port pressure difference data; calculating a target pressure build-up compensation value for the second redundant channel based on the winch linear velocity data and a preset wave subsidence displacement deviation; executing a pressure build-up command on the accumulator of the second redundant channel based on the target pressure build-up compensation value; obtaining compensation adjustment parameters for the redundant proportional valve in the second redundant channel based on the pressure decay curve of the closing process; opening the redundant proportional valve according to the compensation adjustment parameters to release the target compensation pressure, and taking over the hoisting action of the diving bell through the second redundant channel. This technical solution improves the stability of diving bell hoisting operations in complex sea conditions.
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