Patent ID: 9037316
Filing Date: 2015-05-19
Classification: B64C,G06F

Abstract:
1. A method for detection of an impending vortex ring state of a helicopter, having the following steps: establishing flight control signals for flight control with regard to a vertical movement axis of the helicopter in accordance with inputs initiated by a pilot; generating automatically, by a processor, additional control signals with regard to the vertical movement axis of the helicopter and impressing the additional control signals upon the flight control signals, wherein the additional control signals include harmonic control signals; detecting movements of the helicopter in the vertical movement axis of the helicopter with one or more flight behavior sensors; detecting, by the processor, a correlation between the flight control signals and the movements of the helicopter in the vertical movement axis; and identifying, by the processor, the impending vortex ring state of the helicopter when the correlation between the flight control signals and the movements of the helicopter in the vertical movement axis changes.