Northrop Grumman Awarded Patent for Helicopter rotor icing detection system

Northrop Grumman Awarded Patent for Helicopter rotor icing detection system 4 Feb, 19, Source: USPTO

A system includes a signal monitor to monitor a time rate of change of a revolutions per minute (RPM) trim signal that is received from an RPM command path to control a velocity of a helicopter rotor. An icing detector detects for the presence of ice accumulation on the helicopter rotor by comparing the time rate of change of the RPM trim signal to a predetermined threshold for the time rate of change.

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