Resonant mode damping system of a rotor drive train of an engine and methodA control system for increasing the damping of a resonant mode of a rotor drive train is provided. A control loop (102) is introduced in parallel with the free turbine speed governing control loop (11…DRIVE·Apr 16·2 min readFollowB64C27/001PRATT & WHITNEY CANADA [CA]
Engine control systemA power turbine speed control system (10) for a helicopter is disclosed which includes a) means for generating a power turbine speed signal (NF) and a power turbine shaft torque signal (QS) from a pow…DRIVE·Aug 31·1 min readFollowB64C27/001GOODRICH PUMP & ENGINE CONTROL [US]
Engine control systemA 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 filt…DRIVE·Apr 2·1 min readFollowB64C27/001COLTEC IND INC [US]
