Marine Vessel Position-Holding Control With Remaining Distance Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vessel operators face difficulty in realizing the movement of a marine vessel towards a new target position during fine tuning, as there is no visible target on land to gauge the relative movement.
Innovation Solution
The marine vessel propulsion control system displays the remaining distance to the new target position and adjusts the thrust level based on the movement state, ensuring the vessel moves swiftly and accurately towards the target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fine tuning is provided to move the marine vessel to a new target position during fixed point holding control, then the vessel operator can change fishing locations, but the operator cannot easily realize that the vessel is moving toward the new target position due to lack of visual reference on water
Solution Approach 1:
The display device provides visual feedback by showing the remaining distance between the vessel and target position, allowing the operator to monitor movement progress in real-time and understand the vessel's motion toward the new target
Solution Approach 2:
The display device acts as an intermediary that translates the invisible movement of the vessel into visible information (remaining distance), enabling the operator to perceive motion without direct visual reference to land or fixed objects
2Loss of energy
If the vessel moves slowly toward the new target position, then fuel consumption is reduced, but the operator cannot easily perceive the movement and the response time increases
Solution Approach 1:
The display of remaining distance provides immediate feedback on movement progress, allowing the operator to perceive even slow movement and make timely decisions about whether to adjust speed or wait
3Device complexity
If the thrust level is kept constant during movement to target position, then the control system is simple, but the vessel may not reach the target swiftly when external forces like wind or current affect movement
Solution Approach 1:
The thrust level is made dynamic rather than static, automatically adjusting based on the vessel's movement state toward the target, allowing the system to respond to external forces without requiring complex manual intervention
Solution Approach 2:
The control system automatically adjusts thrust levels based on movement progress and external conditions, making the system self-regulating without requiring operator intervention to compensate for wind or current effects
Data Source
AI summary
A marine vessel includes a marine vessel propulsion control system including a display and a controller configured or programmed to control movement of the marine vessel and to execute fixed point holding control to restrict movement of the marine vessel to keep the marine vessel at a predetermined position. When a target position is newly set during the fixed point holding control, the controller is configured or programmed to move the marine vessel to the target position. The display is operable to display a remaining distance as the marine vessel is moving to the target position. The controller is configured or programmed to change, according to a movement state of the marine vessel, a thrust level to be generated by a propulsion device during the fixed point holding control.