Ship Maneuvering System Trim Tab Control
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Solution Overview
Problem
Existing ship maneuvering systems experience changes in traveling state due to the operation of trim adjusters, such as trim tabs and interceptors, which can alter the ship's direction and attitude, leading to resistance and instability.
Innovation Solution
A ship maneuvering system that includes a propulsion unit, a trim adjuster, a detector, and a controller, where the controller sets the steering angle of the propulsion unit to a first angle before operating the trim adjuster and then adjusts it to a second angle to correct changes in the ship's traveling state, thereby minimizing or preventing changes caused by the trim adjuster's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the trim adjuster is operated to change the attitude of the ship body, then the attitude control is improved, but the traveling state of the ship changes due to generated resistance
Solution Approach 1:
The controller applies preliminary anti-action by setting the propulsion unit steering angle to a first steering angle before operating the trim adjuster, and then adjusting it to a second steering angle to counteract the resistance generated by the trim adjuster operation, thereby preventing unwanted changes in the ship's traveling state
Solution Approach 2:
The controller uses feedback from the detector that detects the traveling state of the ship to dynamically adjust the propulsion unit steering angle in response to trim adjuster operation, ensuring the ship maintains its intended traveling state despite resistance generation
2Adaptability or versatility
If the trim adjuster is operated to change the attitude of the ship body, then the attitude adjustment capability is improved, but the traveling direction stability deteriorates
Solution Approach 1:
The controller proactively adjusts the propulsion unit steering angle to counteract the directional changes caused by trim adjuster operation, preventing traveling direction instability before it occurs
Solution Approach 2:
The detector continuously monitors the ship's traveling state and provides feedback to the controller, which dynamically adjusts the propulsion unit steering angle to maintain traveling direction stability while allowing attitude adjustment
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces or prevents changes in the ship's traveling state by dynamically adjusting the propulsion unit's steering angle in response to the trim adjuster's operation, maintaining stability and direction.
Implementation Method 1
a lift force is generated on the ship body by swinging the trim tab from the ship body toward the water surface and contacting the trim tab with the water
Implementation Method 2
a propulsion unit to steer the ship body
Implementation Method 3
a detector to detect a traveling state of the ship
Data Source
AI summary
A ship maneuvering system includes a propulsion unit to steer the ship body, a trim adjuster on the ship body, a detector to detect a traveling state of the ship, and a controller. The controller operates the trim adjuster in a state in which the steering angle of the propulsion unit is set to a first steering angle. The controller sets the steering angle of the propulsion unit to a second steering angle different from the first steering angle to correct a change of the traveling state of the ship due to an operation of the trim adjuster.