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SPACE PATENTS BY
Aerospace Assignees
Aerospace Inventors
Time Lines

System and method for vibration control in a rotorcraft using an adaptive reference model algorithm

Invented by: David E. Heverly, II
Arlington, TX

Rupinder Singh
Arlington, TX

John Pappas
Haltom City, TX Applicant: Name City State Country Type Heverly, II

Originally Assigned to: Textron Innovations Inc.
Providence, RI Family ID: 1000001088027
[Now assigned to . . .]

Issued:2015-05-12
Filed:2010-03-01
Application No:13202731
Examined by:O'Hara; Brian M

The adaptive reference model algorithm uses a gain scheduling feature combined with a customized Least-Squares routine as an adaptive method for adjusting feedback control so as to account for variations in Transfer Function (G), thereby optimizing the effectiveness of the Active Vibration Control (AVC) System. The Least-Squares routine identifies the transfer function in a background process without interruption of closed loop vibration control. This identification approach is accomplished without intentional interrogation of the AVC actuators and without intentional vibration level changes. For this adaptive control logic, the dynamic relationship between AVC actuators and AVC sensors is represented by a mathematical model of Transfer Function (G). The mathematical model of Transfer Function (G) is continuously updated by the Least-Squares routine. A feedback gain (H) is computed from the mathematical model of Transfer Function (G), and the feedback gain (H) is updated each time the mathematical model of Transfer Function (G) is updated.

[pdf] U.S. Pat. No. 9,027,873

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This information is part of a study by Oasis Global, Inc. of all space inventions filed at the United States Patent and Trademark Office, and is provided for informational purposes only. It is not an endorsement of any particular assignee, inventor or invention. Although Peter A. Koziol represents inventors and assignees of space inventions he does not represent all of the inventors and assignees listed. The prosecuting attorney agent or firm for each patent is identified by the United States Patent and Trademark Office in the patent specfication, which can be viewed by clicking on the patent image or downloading the patent document. For more information regarding Mr. Koziol's background and experience, or to learn more about space inventions, please contact Mr. Koziol.

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