Azimuthing Vessel Propulsion Control Using Load Feedback
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Solution Overview
Problem
Current solutions for controlling marine vessel propulsion units are inefficient in maximizing thrust and minimizing energy consumption.
Innovation Solution
A control arrangement with multiple azimuthing propulsion units and a control system that uses load parameter measuring devices, such as strain gauges or optical devices, to determine the load on the vessel and adjust operation parameters like steering angles and propulsion power to optimize thrust and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional propulsion control systems are used, then the vessel can operate with basic propulsion units, but thrust maximization and energy efficiency are not optimized
Solution Approach 1:
The control system continuously receives measured values from load parameter measuring devices (strain gauges, optical devices) and adjusts propulsion unit operation parameters in real-time based on feedback signals. This closed-loop control enables dynamic optimization of thrust and energy efficiency by constantly monitoring actual load conditions and adapting propulsion unit settings accordingly.
Solution Approach 2:
The system dynamically adjusts operation parameters of multiple azimuthing propulsion units based on real-time load measurements. The control system varies steering angles, propulsion power, and other operational characteristics continuously to maximize thrust while minimizing energy consumption under changing vessel conditions.
2Productivity
If multiple azimuthing propulsion units are used with advanced control, then thrust and energy efficiency are optimized, but device complexity increases
Solution Approach 1:
The control system serves multiple functions: it processes measurements from various load parameter devices, calculates optimal operation parameters for multiple propulsion units, sends control signals, and continuously adapts to changing conditions. This multi-functional integrated control architecture manages complexity by consolidating control functions into a unified system rather than separate control circuits for each propulsion unit.
Solution Approach 2:
The control system acts as an intermediary between the load parameter measuring devices and the multiple azimuthing propulsion units. It receives raw measurement data, processes it through calculation algorithms, translates it into appropriate control signals, and distributes these signals to the propulsion units, thereby simplifying the overall system architecture through centralized mediation.
3Measurement precision
If load parameter measuring devices are installed on propulsion units, then real-time load measurement is achieved, but device complexity and installation requirements increase
Solution Approach 1:
The system employs optical devices as load parameter measuring devices to replace or supplement traditional mechanical strain measurement systems. Optical measurement technologies can provide accurate load data without the mechanical contact and wear issues of traditional strain gauges, reducing maintenance requirements and potentially simplifying installation while maintaining measurement precision.
Data Source
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AI summary
A control arrangement for controlling a vessel, comprising at least one propulsion unit (200A, 200B), and a control system (220) for controlling the at least one propulsion unit. The control arrangement is arranged to determine load affected by the propulsion unit on the vessel (210), and the control arrangement is arranged to set a value for an operation parameter of the propulsion unit based on the determined load.