Ship Speed Control Using Auxiliary Thrust Feedback
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Solution Overview
Problem
Existing ship speed control systems fail to maintain a constant speed under significant external force influences, particularly in ships equipped with auxiliary propulsion devices utilizing natural energy, leading to impractical manual adjustments and inefficient navigation.
Innovation Solution
A ship speed control system that includes a main propulsion device, auxiliary propulsion device, ship speed detection, and a control system to automatically adjust the propeller's rotation speed based on detected ship speed deviations, ensuring constant ship speed through a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of engine RPM is used to maintain ship speed under external force influence, then ship speed can be controlled, but the operation becomes complicated and impractical due to frequent adjustments required
Solution Approach 1:
The system enables automatic self-regulation of ship speed by using the detected speed information and auxiliary propulsion force to automatically adjust main engine RPM, eliminating the need for manual intervention and frequent adjustments by crew members
Solution Approach 2:
The control device continuously detects ship speed and auxiliary propulsion force, then feeds this information back to automatically adjust the main engine RPM, creating a closed-loop control system that maintains constant speed without manual intervention
2Reliability
If manual RPM adjustment is performed frequently to counteract external force effects, then ship speed can be maintained, but fuel consumption increases due to inefficient navigation
Solution Approach 1:
The system automatically balances the thrust between main propulsion and auxiliary propulsion by detecting auxiliary force and adjusting main engine RPM accordingly, enabling efficient navigation that reduces fuel consumption while maintaining constant speed
Solution Approach 2:
The control device changes the RPM parameter of the main engine based on detected auxiliary propulsion force variations, optimizing the balance between main and auxiliary thrust to minimize fuel consumption while maintaining constant ship speed
3Ease of manufacture
If the ship relies solely on main propulsion device, then speed control is simple, but the ship cannot effectively utilize natural energy to improve efficiency
Solution Approach 1:
The control device serves multiple functions by simultaneously detecting ship speed, calculating auxiliary propulsion force, determining RPM adjustments, and controlling the main engine, enabling the system to utilize both main propulsion and natural energy effectively
Solution Approach 2:
The system establishes a feedback loop that detects auxiliary propulsion force and uses this information to automatically adjust main engine output, enabling effective utilization of natural energy while maintaining simple operation through automated control
Data Source
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AI summary
The present invention provides a ship speed control system for controlling a ship that is greatly influenced by external force in such a manner that the ship speed is automatically held at a constant level, and a ship equipped with the system. To achieve this, an aspect of the present disclosure is a system (100) for controlling the traveling speed of a ship (10), comprising: a main propulsion device (11) of the ship, including an internal combustion engine (12) and a propeller (13) driven by the internal combustion engine (12); an auxiliary propulsion device (14) that supplements a propulsive force of the ship (10) by utilizing natural energy; a ship speed detection device (20) that detects a traveling speed of the ship (10); a main engine controller (30) that controls the main propulsion device (11); and a control device (40) that determines whether the traveling speed of the ship (10) falls within a predetermined range including a predefined set ship speed V0 and, when the traveling speed does not fall within the predetermined range, transmits a signal to the main engine controller for changing the rotation speed N of the propeller (13) based on a calculation result based on a predetermined rotation speed of the propeller under constant ship speed control.