Active tether control for a tethered multirotor

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United States of America Patent

PATENT NO 11724923
SERIAL NO

16875010

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Abstract

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A control system and method for tensioning an active tether for a multirotor unmanned aerial system is provided. The control system includes a tensioning pulley and a tensioning spring. The tensioning spring is arranged to generate a variable tension force on the active tether. A transducer is connected adjacent to the tensioning spring to sense a linear displacement position of the tensioning pulley and to transmit a position signal to a controller. The position signal is proportional to the linear displacement position. A servomotor in communication with the controller receives a control signal from the controller in response to the position signal. The servomotor drives a cable reel. The cable reel is rotatably mounted in the frame for spooling the tether in response to rotation of the servomotor. The cable reel is rotated by the servomotor to maintain a predetermined tension on the tensioning spring.

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Patent Owner(s)

Patent OwnerAddress
NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA LLCP O BOX 5800 MS-0161 ALBUQUERQUE NM 87185

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Callow, Diane Schafer Albuquerque, US 4 82
Rose, Scott E Albuquerque, US 7 80
Spencer, Steven James Albuquerque, US 4 3

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