Vessel Navigation Tracking Points to Prevent Turn Overshoot
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Solution Overview
Problem
Conventional navigation systems for vessels, such as those using line of sight (LOS) or parallel correction (PC), fail to effectively modify sailing paths deviated by external factors like wind, waves, and ocean currents, often resulting in overshoot effects at turning positions, which increase sailing time and fuel consumption.
Innovation Solution
A vessel navigation system and method that involves generating tracking points along the sailing path to adjust the vessel's course, using a data transceiver, processor, direction controller, and propeller module to dynamically control the vessel's direction and speed based on real-time environmental and positional data, allowing for automatic correction of deviations and prevention of overshoots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LOS or PC methods are used to navigate the vessel, then the navigation system is simple to operate, but the sailing path deviation cannot be effectively modified due to external forces
Solution Approach 1:
The sailing path is segmented into multiple nodes, and the navigation system dynamically selects and tracks relevant nodes based on the vessel's current position and environmental conditions. This segmentation allows the system to manage complexity by breaking down the continuous path into discrete, manageable segments while maintaining overall path accuracy.
Solution Approach 2:
The system pre-establishes multiple candidate nodes along the sailing path before navigation begins. These pre-positioned nodes serve as potential tracking targets, allowing the system to quickly respond to environmental deviations without complex real-time calculations, thus improving reliability while controlling complexity.
2Reliability
If over-rudder is applied to modify sailing path deviation, then the sailing path accuracy is improved, but overshoot effect occurs at turning positions
Solution Approach 1:
The system pre-identifies turning positions and calculates optimal tracking nodes in advance. By knowing the upcoming maneuver requirements beforehand, the system can apply appropriate rudder corrections gradually rather than aggressively, preventing overshoot while maintaining accuracy and reducing unnecessary sailing time.
Solution Approach 2:
The tracking node selection is dynamic and adapts to the vessel's current state and environmental conditions. The system adjusts which node to track based on real-time feedback, allowing for smooth, adaptive course corrections that prevent overshoot while maintaining sailing path accuracy throughout the journey.
3Reliability
If frequent tracking point updates are performed to reduce sailing path deviation, then the sailing path accuracy is improved, but the sailing equipment experiences increased wear
Solution Approach 1:
The system performs tracking point updates selectively rather than continuously. By updating tracking points only when necessary (e.g., when environmental deviation exceeds a threshold or when approaching a node), the system maintains sailing path accuracy while significantly reducing the frequency of rudder adjustments and associated equipment wear.
Solution Approach 2:
The system implements periodic evaluation of tracking point relevance based on the vessel's progress and environmental conditions. Rather than continuous updates, the system checks at intervals whether a tracking point update is needed, balancing path accuracy requirements with equipment preservation through rhythmic, controlled adjustments.
4Reliability
If multiple tracking points are generated to prevent overshoot, then the sailing path accuracy is improved, but the computational complexity increases
Solution Approach 1:
The sailing path is divided into segments with one primary tracking node per segment. This segmentation strategy allows the system to manage multiple nodes without excessive computational complexity by focusing calculations on the current segment's node while maintaining awareness of adjacent segments, thus improving accuracy through structured node management.
Solution Approach 2:
The system applies different levels of computational attention to different parts of the sailing path. High-computational activities (detailed node calculation and tracking) are focused on the current and near-future segments, while distant segments receive minimal processing. This local quality approach maintains overall path accuracy while controlling total computational complexity.
Data Source
AI summary
The present invention relates to a vessel navigation system and navigation method thereof, the method includes: (a) driving a vessel to sail along a sailing path including at least two nodes, the at least two nodes include a first node and a second node connected by a first line segment; (b) generating a first tracking point on the first line segment when a distance between the vessel and the first node being less than a first length, and driving the vessel to sail according to the first tracking point; (c) generating a second tracking point on the first line segment when a distance between the vessel and the first tracking point being less than the first length, and driving the vessel to sail according to the second tracking point; and then completing the navigation of the sailing path by repeating the step (b) and step (c) until the vessel passes through each node.