Patent ID: 9382847
Filing Date: 2016-07-05
CPC Classification: F01D,F02C,F05D

Claim Text:
1. A speed control system for an engine comprising at least one rotary load, the speed control system comprising: a signal separator configured to filter a rotor speed signal into a resonant component and an average speed component that is representative of an average speed in the rotary load determined exclusive of speed oscillations; a rotor speed controller configured to generate a speed control signal based on the average speed component so as to regulate speed in the rotary load, wherein the rotor speed signal is representative of a sensed speed in the rotary load; a resonance disturbance rejection controller configured to generate a resonance compensation signal based on the resonance component of the rotor speed signal, wherein the resonance component is representative of the speed oscillations in the rotary load caused by development of a resonance condition wherein the resonance disturbance rejection controller comprises: a speed control compensator configured to generate the resonance compensation signal so as to provide an adjustment value for the speed control signal determined based on the estimated acceleration component; and a summing junction to adjust the speed control signal based on the resonance compensation signal so as to effect active damping of the speed oscillations.