Ship Propulsion Authentication Layout for Balanced Motor Operation
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Solution Overview
Problem
In a keyless ship propulsion system with multiple outboard motors, malfunctions in authentication devices can lead to unbalanced propulsive forces, making it difficult to maneuver the ship as some motors cannot be unlocked, resulting in biased propulsion and maneuvering challenges.
Innovation Solution
The system employs a master authentication device that recognizes malfunctions in other devices and selects operable outboard motors disposed bilaterally symmetrically about the ship's center, ensuring balanced propulsion by unlocking corresponding motors, thus maintaining balanced propulsive forces even with device failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple authentication devices are provided for multiple outboard motors, then the ship propulsion system can operate with higher redundancy and availability, but when malfunctions occur in authentication devices, unbalanced propulsive forces result making it difficult to maneuver the ship
Solution Approach 1:
The system applies asymmetry by selectively operating only the right outboard motor when a malfunction is detected, rather than attempting to operate both motors. This asymmetric operation prevents unbalanced propulsive forces that would occur if one motor failed while the other continued operating, thereby maintaining maneuverability while preserving redundancy benefits
Solution Approach 2:
The master authentication device dynamically adjusts the operational state of outboard motors based on real-time malfunction detection. When a malfunction is detected in an authentication device or outboard motor, the system automatically changes the operational configuration from dual-motor operation to single-motor operation, ensuring balanced propulsive forces are maintained and maneuverability is preserved
2Reliability
If authentication devices lock outboard motors when malfunctions occur, then system reliability is maintained, but the ship loses propulsion capability on affected sides
Solution Approach 1:
The system extracts or isolates the malfunctioning authentication device and its corresponding outboard motor from the operational system. By taking out the failed component and preventing it from affecting other motors, the system maintains integrity of the remaining operational motors while preserving overall propulsion capability through asymmetric operation
Solution Approach 2:
The system dynamically reconfigures propulsion operation based on malfunction status. When malfunctions are detected, the system transitions from a static dual-motor operation mode to a dynamic single-motor operation mode, maintaining system integrity while adapting productivity to actual operational capabilities
Data Source
AI summary
A ship propulsion system includes authentication devices that respectively stores different authentication codes. Each of the authentication devices corresponds to one or more ship propulsion devices. Two or more authentication devices among the plurality of authentication devices do not simultaneously correspond to one ship propulsion device. Each of the authentication devices operates as a master authentication device when an authentication code transmitted from a communication device matches an authentication code stored in the authentication devices. The master authentication device recognizes whether a malfunction occurs in the authentication devices; and to select a ship propulsion device disposed in a manner of being bilaterally symmetrical about the center of the ship in the left-right direction from ship propulsion devices corresponding to an authentication device in which no malfunction occurs. A control device brings the ship propulsion device selected by the master authentication device into an operable state.