Method and device for calculating flight parameters of air data sensing system without total pressure measuring point

Abstract

The invention discloses a method and device for calculating flight parameters of an air data sensing system without a total pressure measuring point. The method includes: determining the flight at the current moment according to the flight parameter combination at the previous moment and the preset search interval setting parameters Parameter combination search interval; for each flight parameter combination determined from the flight parameter combination search interval, the shock wave expansion wave method is used to calculate the pressure prediction value of each pressure measurement point corresponding to the flight parameter combination, and the calculated pressure measurement points The predicted pressure value of each pressure measuring point is compared with the measured pressure value of each pressure measuring point, and the flight parameter combination corresponding to the pressure predicted value of each pressure measuring point with the smallest overall deviation from the pressure measured value of each pressure measuring point is determined as the flight at the current moment. combination of parameters. The invention solves the problem that it is difficult to solve the flight parameters due to the lack of total pressure data.

Description

technical field [0001] The invention relates to a flight parameter calculation method of an air data sensing system (FADS) without a total pressure measuring point, in particular to a flight parameter calculation method that can be used for an aircraft with a head multi-stage compression surface shape under the condition that the total pressure of the leading edge cannot be measured. Air Data Sensing System (FADS) Flight Parameter Calculation Method. Background technique [0002] Aircraft flying in the atmosphere put forward an urgent demand for the measurement of atmospheric parameters (including hydrostatic pressure, flight Mach number, angle of attack and sideslip angle, etc.). At present, pitot tubes are widely used in various aircrafts to obtain real-time atmospheric parameters. By sensing the pressure values ​​at a group of pressure measuring points arranged on it, the required atmospheric parameter values ​​are back-calculated with the help of specific algorithms or ...

AI Technical Summary

Problems solved by technology

Most of the calculation methods of the current atmospheric parameter sensing system are based on the situation that there are total pressure measurement points, and the research on the calculation methods in the case of no total pressure measurement points or the total pressure measurement points is very scarce, and there is no The accuracy and stability of the total pressure algorithm are not ideal

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