Ship Collision Replay System Using Free Running Model Test
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Solution Overview
Problem
Current systems for replaying and analyzing ship collision accidents lack the capability to accurately simulate and evaluate physical avoidance maneuvers in real-time, which is crucial for identifying and mitigating collision risks among multiple ships.
Innovation Solution
A replay system and method using a free running model test that allows for real-time verification of ship collision accident simulations by physically replaying the collision using a scaled model ship, enabling the generation and application of propulsion and steering commands to simulate and evaluate avoidance maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a replay system uses navigation information from AIS or VTS to plot trajectories on an electronic navigation chart, then collision risk can be identified, but the physical behavior of the ship during avoidance maneuvers cannot be accurately determined
Solution Approach 1:
The patent creates a scaled-down physical model ship that replicates the navigation and avoidance maneuvers of the actual accident ship. By measuring the model ship's physical movements in a controlled environment and scaling the results back to full-size proportions, the system accurately determines the physical behavior without requiring complex sensor arrays on the actual vessel.
Solution Approach 2:
The patent introduces a physical model ship as an intermediary between the actual accident ship and the replay system. This model ship, equipped with simplified sensors and control mechanisms, serves as a mediator that can be physically manipulated and measured to infer the behavior of the full-scale vessel during collision avoidance maneuvers.
2Measurement precision
If a simulation system assumes the same type of ship navigation model based on specification information, then avoidance evaluation can be performed, but the physical avoidance behavior according to actual avoidance control cannot be accurately simulated
Solution Approach 1:
The patent performs preliminary physical testing of the model ship in a controlled water tank environment before conducting full-scale avoidance evaluations. By pre-testing the model ship's response to various maneuvers and recording its physical behavior, the system establishes baseline data that can be quickly referenced during actual avoidance evaluation scenarios, reducing the time needed for comprehensive testing.
Solution Approach 2:
The patent creates a physical copy of the ship's avoidance behavior through the scaled model ship. By physically executing avoidance maneuvers with the model ship and measuring its actual physical response, the system obtains accurate simulation data that reflects real-world physical behavior rather than relying solely on theoretical navigation models.
3Measurement precision
If manual lookout tasks are performed with support from radar and electronic navigational chart equipment, then collision risk can be detected, but it takes a lot of time to identify collision situations at early stages and manually check equipment
Solution Approach 1:
The patent implements an automated replay system that autonomously executes avoidance maneuvers and evaluates collision risk without requiring manual intervention. The system automatically controls the model ship, processes navigation data, and performs avoidance evaluations, eliminating the need for manual equipment checking while maintaining high detection accuracy.
Solution Approach 2:
The patent incorporates real-time feedback mechanisms that continuously monitor the model ship's position, speed, and maneuver execution, automatically adjusting the replay simulation to match actual physical behavior. This feedback loop enables the system to quickly identify and respond to collision risks without manual verification, improving both accuracy and speed of detection.
Data Source
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AI summary
Provided is a replay system of ship collision accidents using a free running model test including a ship collision replay simulation system configured to replay the ship collision accidents by receiving a navigation trajectory of the ship collision accidents; a free running model system configured to perform a free running model test of the collision accident ship using a free running model ship; and a free running control system configured to remotely perform the free running model test, in which the replay of the ship collision accidents is performed by simultaneously performing a simulation in the ship collision replay simulation system and a free running model test in the free running model system.