Multi-Motor Vessel Control for Independent Position and Orientation
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Solution Overview
Problem
Current marine vessel navigation systems using single motors struggle to precisely control both the position and orientation of the vessel, especially in environments requiring precision like shallow water or obstacle navigation, as they cannot maintain a fixed orientation due to pivoting around the motor.
Innovation Solution
A multiple motor control system employing at least two motors, such as a trolling motor and a thruster, or a trolling motor and a propulsion motor, with a controller that receives position and orientation measurements to generate control signals for each motor, allowing independent control of position and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor is used to navigate the marine vessel, then the device complexity is reduced, but the position and orientation control precision deteriorates
Solution Approach 1:
The navigation system is segmented into multiple independent motor units, each capable of independent control. The controller divides the navigation tasks (position control and orientation control) into separate control loops, with each motor dedicated to specific control functions. This segmentation allows precise independent control of position and orientation without requiring a complex integrated single-motor system.
2Device complexity
If a single motor is used for navigation, then the system structure is simplified, but the ability to maintain fixed orientation deteriorates due to pivoting around the motor
Solution Approach 1:
By separating the motor functions into multiple units positioned at different locations on the vessel, the system eliminates the pivoting problem inherent in single-motor systems. Each motor can independently adjust thrust to maintain stable orientation without causing rotational instability around a single pivot point.
Solution Approach 2:
The system merges multiple motor units into a coordinated propulsion system where each motor contributes to both position and orientation control. The controller integrates the output from multiple motors to achieve stable orientation maintenance while eliminating the pivoting instability characteristic of single-motor systems.
3Measurement precision
If multiple motors are employed for precise position and orientation control, then the navigation precision in challenging environments is improved, but the device complexity increases
Solution Approach 1:
The control system is segmented into dedicated control loops for position and orientation, with each motor unit having specific control functions. This modular segmentation simplifies the overall control architecture despite using multiple motors, as each control loop can be independently tuned and managed without requiring complex integrated control algorithms.
Data Source
AI summary
A control system for navigating a marine vessel employs at least a first motor and a second motor. The control system is configured to communicate with the first and second motors. The control system is configured to receive a position measurement and an orientation measurement for the marine vessel. The control system is further configured to generate at least one control signal for the first motor based on the position measurement and at least one control signal for the second motor based on the orientation measurement.