Floating device having active stabilization and method for active stabilization

Patent metadata

Field	Value
Publication number	US-10994816-B2
Application number	US-201916292132-A
Country	US
Kind code	B2
Filing date	Mar 4, 2019
Priority date	Mar 4, 2019
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A floating device having active stabilization and a method for actively stabilizing a floating device employs a floating device that operates underwater and which may be tethered to the floor of the body of water. The floating device having active stabilization includes an internal sensor assembly which measures angular velocity and generates a real time output corresponding to a measured angular velocity and a counter-rotation assembly which generates in real time mechanical energy in the form of rotation in response to the real time output of the sensor assembly that causes a counter-rotation torque on the device body that opposes the measured angular velocity. The counter-rotation torque may be imparted by accelerating a flywheel as a reaction wheel in the opposite direction of the desired counter-rotation torque, thereby achieving stability of the device body in the form of minimizing rotation.

First claim

What is claimed is:

1. A floating device having active stabilization, comprising:
a device body, wherein said device body is buoyant and constructed to be positioned underwater;
a sensor assembly disposed in the device body, wherein the sensor assembly includes a gyroscope, a compass, is adapted to measure angular velocity, and generates a real time output corresponding to a measured angular velocity; and
a counter-rotation assembly disposed in the device body integral with said sensor assembly, wherein said counter-rotation assembly is adapted to generate in real time mechanical energy in a form of rotation in response to the real time output of the sensor assembly that causes a counter-rotation torque on the device body that opposes the measured angular velocity.

2. The floating device having active stabilization of claim 1 , additionally comprising a tether attached to the device body and to a discrete attachment object.

3. The floating device having active stabilization of claim 1 , wherein said device body is elongated.

4. The floating device having active stabilization of claim 1 , wherein said device body is cylindrical.

5. The floating device having active stabilization of claim 1 , wherein said sensor assembly includes at least one of a gyroscope and a compass.

6. The floating device having active stabilization of claim 1 , wherein said counter-rotation assembly includes at least a motor operatively connected to a battery, a flywheel operatively connected to the motor, and a controller operative to selectively cause electrical power to be directed from the battery to the motor in a manner which causes the motor to rotate the flywheel.

7. The floating device having active stabilization of claim 6 , wherein the controller is connected to the sensor assembly so as to receive as electrical signals output corresponding to a measured angular velocity in real time.

8. A floating device having active stabilization, comprising:
a device body, wherein said device body is buoyant and constructed to be positioned underwater;
a sensor assembly disposed in the device body, wherein the sensor assembly includes a gyroscope, a compass, is adapted to measure angular velocity, and generates a real time output corresponding to a measured angular velocity; and
a counter-rotation assembly disposed in the device body integral with said sensor assembly, wherein said counter-rotation assembly includes at least a motor operatively connected to a battery, a flywheel operatively connected to the motor, and a controller operative to selectively cause electrical power to be directed from the battery to the motor in a manner which causes the motor to rotate the flywheel and is adapted to generate in real time mechanical energy in a form of rotation in response to the real time output of the sensor assembly that causes a counter-rotation torque on the device body that opposes the measured angular velocity.

9. The floating device having active stabilization of claim 8 , wherein the device body includes a tether that is attached to the device body and to a discrete attachment object.

10. The floating device having active stabilization of claim 8 , wherein said device body is elongated.

11. The floating device having active stabilization of claim 8 , wherein said device body is cylindrical.

12. The floating device having active stabilization of claim 8 , wherein the controller is connected to the sensor assembly so as to receive as electrical signals output corresponding to a measured angular velocity in real time.

13. The floating device having active stabilization of claim 12 , additionally comprising a tether attached to the device body and to a discrete attachment object.

14. A method for actively stabilizing a floating device, comprising the steps of:
providing a device body constructed to be buoyant and positioned underwater and having an internal sensor assembly and an internal counter-rotation assembly wherein:
said internal sensor assembly includes at least one of a gyroscope and a compass; and
said counter-rotation assembly includes at least a motor operatively connected to a battery, a flywheel operatively connected to the motor, and a controller operative to selectively cause electrical power to be directed from the battery to the motor in a manner which causes the motor to rotate the flywheel;
measuring by the internal sensor assembly an angular velocity of the device body;
determining a desired torque direction and magnitude for the device body to counteract the measured angular velocity of the device body; and
causing the counter-rotation assembly to generate in real time mechanical energy in the form of rotation in response to the determined desired torque direction and magnitude that causes a counter-rotation torque on the device body that opposes the measured angular velocity.

15. The method for actively stabilizing a floating device of claim 14 , wherein said device body includes a tether attached to the device body and to a discrete attachment object.

16. The method for actively stabilizing a floating device of claim 14 , wherein the counter-rotation assembly generates mechanical energy in the form of rotation that causes a counter-rotation torque on the device body that opposes the measured angular velocity using a motor driven flywheel.

17. The method for actively stabilizing a floating device of claim 14 , wherein the controller is connected to the sensor assembly so as to receive as electrical signals output corresponding to a measured angular velocity in real time.

Assignees

• Spawar Systems Ct Pacific
• Us Navy

Inventors

• Roth Leif E

Classifications

• B63B39/14

  for indicating inclination or duration of roll · CPC title

• B63B39/04 Primary

  to decrease vessel movements by using gyroscopes directly · CPC title

• B63B2022/006

  specially adapted for measuring or watch purposes · CPC title