Modular Hull Thrusters for Precise Low-Speed Vessel Steering
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Solution Overview
Problem
Existing thruster systems for marine vessels, which are typically centrally mounted and self-contained, require significant power to maneuver at low speeds, hinder vessel operation and maintenance, and are costly to repair due to their single-unit design.
Innovation Solution
A modular thruster system with independently controllable thruster motor/propeller units mounted at various hull locations, each with a small electric motor and a separate control mechanism, allowing precise maneuvering and easy replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a centrally mounted self-contained thruster system is used, then the vessel can maneuver at low speeds, but the system consumes significant power and creates clutter on the vessel
Solution Approach 1:
The patent divides the vessel into multiple sections with separate thruster units mounted at different locations (bow, stern, sides). Each thruster unit operates independently with its own motor and propeller, allowing distributed thrust generation that reduces the power burden on any single unit and enables precise low-speed maneuvering through coordinated operation of multiple smaller thrusters rather than one large central thruster.
2Speed
If a centrally mounted self-contained thruster system is used, then the vessel can maneuver at low speeds, but the system creates clutter and hinders vessel operation
Solution Approach 1:
The patent divides the vessel into multiple sections with separate thruster units mounted at different locations (bow, stern, sides). Each thruster unit operates independently with its own motor and propeller, allowing distributed thrust generation that reduces the power burden on any single unit and enables precise low-speed maneuvering through coordinated operation of multiple smaller thrusters rather than one large central thruster.
Solution Approach 2:
The patent adds spatial distribution as a new dimension to the thruster system design. Instead of concentrating all thruster functionality in a single central location, the system distributes thruster units across multiple locations on the vessel hull (bow, stern, port side, starboard side), utilizing the three-dimensional space available on the vessel to achieve both maneuverability and operational clarity.
3Speed
If a centrally mounted self-contained thruster system is used, then the vessel can maneuver at low speeds, but repair costs are high due to single-unit design
Solution Approach 1:
The patent divides the vessel into multiple sections with separate thruster units mounted at different locations (bow, stern, sides). Each thruster unit operates independently with its own motor and propeller, allowing distributed thrust generation that reduces the power burden on any single unit and enables precise low-speed maneuvering through coordinated operation of multiple smaller thrusters rather than one large central thruster.
Solution Approach 2:
The patent implements a modular thruster system where individual thruster units can be independently removed, replaced, or repaired without affecting other thruster units or the main propulsion system. This modular design allows for easier maintenance and repair, reducing downtime and repair costs by isolating failures to single units rather than requiring system-wide repairs.
4Device complexity
If the main propulsion system is used for low speed maneuvering, then the system is simple, but directional control is diminished
Solution Approach 1:
The patent divides the vessel into multiple sections with separate thruster units mounted at different locations (bow, stern, sides). Each thruster unit operates independently with its own motor and propeller, allowing distributed thrust generation that reduces the power burden on any single unit and enables precise low-speed maneuvering through coordinated operation of multiple smaller thrusters rather than one large central thruster.
Solution Approach 2:
The patent implements a dynamic control system that can independently adjust the speed and direction of each thruster unit based on real-time maneuvering requirements. This dynamic capability allows the system to provide precise directional control at low speeds by differentially controlling thrust from multiple locations, something a single main propulsion system cannot achieve.
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
Enhances maneuverability and reduces clutter on the vessel, lowers power consumption, and simplifies maintenance by enabling independent control and replacement of thruster units without affecting the main propulsion system.
Implementation Method 1
Each modular thruster motor/propeller unit 27 can comprise an electric motor 22 and a propeller 29
Implementation Method 2
A thruster propeller 17 is mounted inside of the motor housing 12 on a boom (not shown). The thruster motor in housing 12 is used to drive the thruster propeller 17 to produce the desired side thrust
Data Source
AI summary
A thruster system for improved steering and maneuverability of a marine vessel when operating at relatively low, or wakeless speeds, such as in the vicinity of docks, swimmers or other obstacles, or when trailering, beaching or mooring. The thruster system has a modularized design adapted to independently control separate motor/propeller units located at various positions on the vessel's hull. Each propeller of the modular thruster motor system has its own relatively small, electric motor and mounting bracket, permitting each motor to be separately mounted to a location on the hull of the marine vessel apart from other thruster motors. The thruster system is further enhanced by an electrical control system for controlling each modular thruster motor system of the thruster system. The electrical control system includes a control mechanism integrated with the steering wheel and/or throttle of the marine vessel and operates independently of the main propulsion and steering systems of the marine vessel.