METHOD FOR MEASUREMENT OF HELICOPTER AIR SIGNALS AND SYSTEM FOR ITS REALIZATION Russian patent published in 2007 - IPC G01P5/16 

FIELD: measurement of helicopter altitude-speed parameters.

SUBSTANCE: two plane-parallel orthogonal air jets are separated in the yawing plane and in the plane orthogonal to it, throttled static pressures and pressures characterizing the angles of downwash of the plane-parallel air jets are formed, the pressures are transformed to electric signals with the aid of which the angles of downwash of the vortex column of the helicopter main rotor are determined, the components of the airspeed vector are calculated, and the helicopter altitude-speed parameters at low flight speeds are determined. The helicopter air signal system has two orthogonally located flow-through multichannel aerometric receivers, whose throttled static pressure tubes are connected to pneumoelectric, for example, thermoanemoment converters, whose outputs of the electric measuring circuits via a multiplexer and analog-to-digital converter are connected to a microcessor, in which the angles of downwash of the vortex column of the helicopter main rotor are determined, they are used at calculation of the components of airspeed vector and in determination of the helicopter altitude-speed parameters at low flight speeds.

EFFECT: enhanced accuracy of measurement of the helicopter altitude-speed parameters, expanded operating ranges in angle of attack and speed, especially in the area of the low flight speeds, which makes it possible to enhance the safety of helicopter control and pilotage, efficiency of solution of the piloting-navigational and special tasks.

2 cl, 7 dwg