FIELD: aviation.
SUBSTANCE: invention relates to a flight test (FT) of aircraft models (AM) and AM directly themselves, namely to methods for determining the control signal from the angle of heel model of hypersonic aircraft (HVE). The method includes measuring the height, flight speed, angle of attack and the roll needed at the same angle of attack as a function of Mach number as for the full-scale articles onboard measuring temperature, pressure and density of the atmosphere, thus producing control angle roll in flight according to the algorithm. At the same time continuously during the flight path is calculated reduction required bank angles for the model to ensure that the flight model SFA path that satisfies the criterion of similarity on the numbers Remod≅Repro match the full-scale numbers of Reynolds of the natural product. At the same time continuously during the flight path is calculated reduction required bank angles for the model to ensure that the flight model SFA path that satisfies the criterion of similarity on the numbers Remod≅Repro match the full-scale numbers of Reynolds of the natural product. Then derivative values calculated from the inclination angle of the trajectory in time. As a result of these procedures calculate control signals for bank angle required in the implementation of the trajectory model, for which the condition Remod≈Repro. By limiting the control range take limit bank angle. The resulting error by Reynolds numbers ΔRe=Remod-Repro between the experimental and the set value is compared with the allowable values for error estimation.
EFFECT: improved accuracy performance of the similarity of conditions on the number of models and full-scale Reynolds products hypersonic aircraft throughout the flight path.
6 dwg
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METHOD FOR HYPERSONIC AIRCRAFT (HAC) MODEL ROLL ANGLE GENERATION OF A CONTROL SIGNAL FOR CONTROLLING THE AERODYNAMIC IDENTITY ACCORDING TO THE REYNOLDS NUMBERS OF THE FLIGHT TRAJECTORIES OF THE MODEL AND THE FULL-SCALE AIRCRAFT IN CONDUCTING ADVANCED FLIGHT TESTS OF AERODYNAMIC CHARACTERISTICS | 2017 |
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Authors
Dates
2017-04-04—Published
2016-02-19—Filed