Backstepping method for determining meteorological parameter MVD based on wing icing thickness

Abstract

The invention discloses a backstepping method for determining a meteorological parameter MVD based on a wing icing thickness, and relates to the technical field of ice shape prediction and detection of aircraft icing. The meteorological parameter MVD can be detected in real time without changing shapes of wings during flight, and the backstepping method isapplied to aircraft icing airworthiness certification, and icing environment conditions that meet requirements are detected. The backstepping method comprises the steps that icing conditions under different flight conditions are calculatedaccording to the relationship amonga liquid water content LWC, an average effective droplet diameter MVD and an ambient air temperature T,and an icing thickness database of the icing thickness changing with times is established; and flight conditions, the temperature T, and a h-t curve of the icing thickness changing with the timesare provided in real time, time-icing thickness interpolation and a standard deviation are calculated by using aconstant correction positive coefficientinverse distance weighted interpolation algorithm, and the backstepping optimal MVD value is determined by the least square method. The backstepping method for determining the meteorological parameter MVD based on the wing icing thickness is high in accuracy and small in error, the real-time measurement can be achieved, the icingairworthiness certification is provided with an effective and reliable technical support, and the application prospect is promising.

Description

technical field

[0001] The invention relates to the technical field of aircraft icing and ice shape prediction and detection, in particular to a reverse deduction method for determining meteorological parameter MVD based on wing icing thickness. Background technique

[0002] When the aircraft passes through the cloud of supercooled water droplets, the wing will freeze, the structure and appearance of the aircraft will change, and the aerodynamic performance will decrease. Real-time and accurate detection of icing environmental parameters is conducive to selecting the right time to turn on or turn off anti-icing protection to achieve the purpose of energy saving. In addition, in the airworthiness certification of aircraft icing, there are certain requirements for the atmospheric icing test environment. The variability of the atmospheric environment often causes great difficulties for airworthiness certification, and it is not easy to generate a corresponding test environment....

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