The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2006
Filed:
Jul. 07, 2003
Mihir C. Desai, Yorba Linda, CA (US);
Tomasz J. Stanecki, Bristol, CT (US);
Jeffrey S. Mattice, Enfield, CT (US);
Mihir C. Desai, Yorba Linda, CA (US);
Tomasz J. Stanecki, Bristol, CT (US);
Jeffrey S. Mattice, Enfield, CT (US);
Goodrich Pump & Engine Control Systems, Inc., Charlotte, NC (US);
Abstract
A power turbine speed control system for a helicopter is disclosed which includes components for generating a power turbine speed signal based upon a demanded rotor speed, a high-order filter for filtering the power turbine speed signal by effectuating a rapid attenuation of main and tail rotor torsional frequencies in the power turbine speed signal without compromising phase at low frequencies, and a governor for providing isochronous power turbine speed and rotor speed control based upon the filtered power turbine speed signal.