Inventors:
Mihir C. Desai - Yorba Linda CA, US
Tomasz J. Stanecki - Bristol CT, US
Jeffrey S. Mattice - Enfield CT, US
Assignee:
Goodrich Pump & Engine Control Systems, Inc. - Charlotte NC
International Classification:
F02C 3/10
F02C 9/28
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.