Vessel Air Lubrication Controller for Friction Reduction
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Solution Overview
Problem
Existing air lubrication mechanisms for vessels face challenges in efficiently reducing frictional resistance while balancing energy consumption, as the energy required for continuous operation often exceeds the energy saved, and manual control is complex and ineffective.
Innovation Solution
A controller that coordinates the ejection mechanism for bubbles and the propulsion mechanism, allowing for cooperative control to optimize the air lubrication effect by adjusting bubble ejection based on propulsion demands, thereby improving energy balance and reducing frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the air lubrication mechanism is continuously operated to maintain air layer thickness, then frictional resistance is reduced, but energy consumption increases beyond the energy saved
Solution Approach 1:
The patent implements periodic action by controlling the air blower to operate in cycles rather than continuously. The control unit activates the air blower when the air layer thickness falls below a predetermined threshold and deactivates it when the threshold is sufficient, creating a periodic on-off operation pattern that maintains lubrication effect while reducing energy consumption.
Solution Approach 2:
The patent employs feedback control by using sensors to detect the actual air layer thickness and comparing it with the target threshold. The control unit adjusts the air blower operation based on this feedback information, increasing air supply when thickness is insufficient and reducing supply when thickness is adequate, thereby optimizing energy usage while maintaining friction reduction.
2Use of energy by moving object
If the air lubrication mechanism is operated only when needed, then energy consumption is reduced, but the air lubrication effect cannot always be appropriately exerted
Solution Approach 1:
The control unit continuously monitors air layer thickness through sensors and automatically activates the air blower when the thickness falls below the predetermined threshold, ensuring the air lubrication effect is maintained reliably without requiring manual judgment or complex operator determination.
Solution Approach 2:
The system performs self-service by automatically detecting air layer thickness and controlling air blower operation without manual intervention. The control unit independently manages the activation and deactivation of the air blower based on sensor feedback, ensuring reliable air lubrication effect while optimizing energy consumption.
3Ease of operation
If manual determination is used to control the air lubrication mechanism, then operational flexibility is maintained, but the air lubrication effect cannot always be appropriately exerted due to complexity
Solution Approach 1:
The control unit automatically receives feedback from sensors regarding air layer thickness and makes real-time decisions on air blower operation, eliminating the need for complex manual determination while ensuring the air lubrication effect is appropriately maintained through objective, data-driven control.
Solution Approach 2:
The patent replaces manual mechanical control with an automated electronic control system that uses sensors and control units to monitor and adjust air blower operation, substituting human judgment with automated feedback control to improve reliability while maintaining ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The controller effectively reduces frictional resistance by optimizing the air lubrication effect, improving energy balance, and enhancing propulsion efficiency by synchronizing bubble ejection with propulsion needs.
Implementation Method 1
a vessel having an air lubrication mechanism for providing an air layer on a vessel bottom... an air blower that blows out air from the vessel bottom... the ejection mechanism that ejects bubbles into the water through an air outlet provided in a hull of a vessel
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A controller (10) according to an aspect includes: a bubble control unit (20) that controls an ejection mechanism (80) that ejects bubbles into water through an air outlet (84) provided in a hull (90) of a vessel (1) and a propulsion control unit (30) that controls a propulsion force of a propulsion mechanism (70) that propels the hull (90). One of the propulsion control unit and the bubble control unit is controlled according to control of the other.