Marine Vessel Shift Actuator Controller Intermittent Mode
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Solution Overview
Problem
Existing marine vessel maneuvering systems experience delayed responsiveness when switching from a continuous shift-in state to a lower speed state, causing users to perceive a delay in speed change timing.
Innovation Solution
A marine vessel maneuvering system with a controller that immediately starts the intermittent operation mode from the shift-out state when switching from a normal operation mode, allowing for immediate transition to a speed lower than the continuous shift-in state, and adjusts the duration ratio of shift-in and shift-out states based on user input or automatic navigation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intermittent operation mode is started from the shift-in state after switching from normal operation mode, then the system maintains continuous driving force transmission, but the marine vessel does not immediately change to lower speed causing delayed responsiveness
Solution Approach 1:
The controller is configured to determine whether to start the intermittent operation mode from the shift-in state or the shift-out state in advance, before the actual mode switching occurs. This preliminary determination ensures that when switching to intermittent mode, the system can immediately begin from the shift-out state to achieve immediate speed reduction, eliminating the responsiveness delay while maintaining reliability through proper advance planning of the transition sequence
2Power
If the intermittent operation mode is started from the shift-in state, then the driving force transmission is maintained, but the user perceives a delay in speed change timing
Solution Approach 1:
Instead of starting the intermittent operation mode from the shift-in state (which maintains power but causes delay), the controller is configured to start from the shift-out state. This inversion of the conventional approach allows the system to immediately reduce speed as perceived by the user, while the power transmission is properly managed through the intermittent cycling that follows, thus prioritizing user-perceived responsiveness without completely sacrificing power transmission capability
3Speed
If the shift actuator alternates between shift-in and shift-out states in predetermined period, then the marine vessel navigates at lower speed, but the transition timing feels delayed to the user
Solution Approach 1:
The controller determines in advance whether to start the intermittent operation from the shift-in state or the shift-out state based on the switching timing from normal operation mode. By making this determination beforehand, the system can optimize the transition to ensure immediate speed reduction when needed, eliminating the perceived delay in transition timing while maintaining the beneficial lower speed navigation through intermittent operation
Data Source
AI summary
A marine vessel maneuvering system includes a controller configured or programmed to perform a shift-out start control to control a shift actuator to immediately start an intermittent operation mode from a shift-out state when an intermittent operation switching control is performed to switch a normal operation mode in which a shift-in state continues to the intermittent operation mode in which the shift-in state and the shift-out state are repeated in a predetermined period of time based on a user's operation.