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US 10,479,513 B2Granted
Helicopter rotor icing detection system and method
AssigneeNorthrop Grumman Systems Corporation
InventorJonathan D. Almond
Life of this patent
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Abstract
A system includes a signal monitor to monitor a time rate of change of a revolution 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.
Claims16
An unmanned aerial vehicle (UAV), comprising:
- a UAV controller to control flight operations of the UAV;
- and
- an icing detector to monitor a time rate of change of a revolution per minute (RPM) trim signal received from an RPM command path with respect to a predetermined threshold for the time rate of change, the icing detector notifies the UAV controller to initiate corrective actions for the UAV if the time rate of change of the RPM trim signal exceeds the predetermined threshold for the time rate of change.
A method, comprising:
- controlling flight operations of an unmanned aerial vehicle (UAV);
- monitoring a revolution per minute (RPM) command path with respect to an RPM command for the RPM command path;
- monitoring a time rate of change of an RPM trim signal in the RPM command path with respect to a predetermined threshold for the time rate of change;
- and
- initiating corrective actions for the UAV if the time rate of change of the RPM trim signal exceeds the predetermined threshold for the time rate of change.
2 more elements
Dependencies are inferred from the claim text.