Gyroscopic Boat Roll Stabilizer Braking for ±45° Precession
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Solution Overview
Problem
Existing gyroscopic boat stabilization systems face limitations in precession range and resistance, which affect their ability to effectively counteract boat rolling motion, particularly when the boat is at rest.
Innovation Solution
A braking system for gyroscopic boat stabilizers that allows the flywheel to precess up to ±45 degrees, featuring a dual-actuator design with a manifold assembly and hydraulic accumulators to enhance precession control and reduce fluid flow resistance, enabling faster response to wave motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional braking system is used to control flywheel precession, then the system structure is simple, but the precession range is limited to about ±22 degrees and the response rate is slow
Solution Approach 1:
The braking system is divided into multiple independent actuators (first actuator and second actuator) that can be controlled independently. Each actuator manages a specific direction of precession, allowing the system to achieve a wider precession range (±45 degrees) while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The braking system transitions from a static, fixed-range design to a dynamic, adjustable-range system. The actuators can dynamically adjust the precession angle within ±45 degrees and control the rate of precession, enabling the system to adapt to different wave conditions and boat rolling scenarios.
2Speed
If a braking system with high resistance is used to control precession, then the system has simple structure, but the rate of precession is limited affecting response to wave motion
Solution Approach 1:
The braking system incorporates a hydraulic manifold assembly with accumulators that use hydraulic pressure to control the actuators. This hydraulic system provides high-speed, high-force actuation that enables rapid precession rates while the manifold design optimizes fluid flow to minimize resistance, achieving fast response to wave motion.
Solution Approach 2:
The hydraulic accumulators store pressurized fluid in advance, ready to be discharged when precession control is needed. This preliminary action allows the system to respond rapidly to wave motion without waiting for fluid to be pumped from scratch, significantly reducing the response time while maintaining a relatively simple overall structure.
3Force
If the braking system restricts precession to limited angles, then the system structure is simpler, but the ability to counteract boat rolling motion is insufficient
Solution Approach 1:
The braking system uses separate actuators for different directions of precession control, allowing each actuator to be optimized for generating maximum torque in its specific direction. This segmentation enables the system to generate higher peak roll torque by independently controlling precession in both directions, while keeping each individual actuator design relatively simple.
Solution Approach 2:
The system changes the precession angle parameter dynamically within the range of ±45 degrees, and also changes the rate of precession based on the severity and frequency of boat rolling. This parameter adjustment capability allows the system to generate optimal roll torque for different sea conditions without requiring a completely different mechanical structure.
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
The enhanced braking system increases peak roll torque and reduces fluid flow resistance, allowing the gyroscopic stabilizer to respond more quickly and effectively to rolling motions, improving stability and passenger comfort.
Implementation Method 1
Gyroscopic boat stabilization is another technology for roll suppression that is based on the gyroscopic effect. A control moment gyroscope (CMG) is mounted in the boat and generates a torque that can be used to counteract the rolling motion of the boat.
Implementation Method 2
The braking system is configured to enable precession in the first and second directions of up to at least 45 degrees.
Implementation Method 3
The braking system comprises a first actuator connected between the support frame and the enclosure to resist precession in a first direction about the gimbal axis, and a second actuator connected between the support frame and the enclosure to resist precession in a second direction about the gimbal axis.
Implementation Method 4
the resistance of the braking systems imposes limitations on the rate of precession
Data Source
AI summary
A gyroscopic boat roll stabilizer for a boat comprises a gimbal, having a gimbal axis, an enclosure mounted to the gimbal and configured to precess about a gimbal axis, a flywheel assembly rotatably mounted inside the enclosure for generating a torque that is applied to counter a rolling motion of the boat, and a braking system for controlling precession of the enclosure.