System and method for calibrating aircraft overload sensor system level installation error

Abstract

The invention relates to a system and a method for calibrating an aircraft overload sensor system level installation error, and belongs to the technical field of total pneumatic identification of aircrafts. The method for calibrating an aircraft overload sensor system level installation error can be used for correcting overload measuring data after flight test, and ensuring precision and dependability of aircraft pneumatic parameter identification; the method can be used as a design parameter of aircrafts for resolving flight navigation.

Description

technical field [0001] The invention relates to an aircraft overload sensor system-level installation error calibration system and method, and belongs to the technical field of aircraft overall aerodynamic identification. Background technique [0002] The overload sensor is a commonly used navigation device on a class of aircraft, which can measure the acceleration generated by the resultant force other than gravity, and is also an important measurement device for aerodynamic parameter identification. The overload sensor is usually composed of three orthogonal sensitive axes, which are sensitive to the overload in the three directions respectively. However, due to the manufacturing error of the aircraft, there is an installation deviation between the three sensitive axes of the overload sensor and the body coordinate system of the aircraft. It has a certain influence on the identification of aerodynamic parameters of the aircraft, especially when the overload of one or two d...

AI Technical Summary

Problems solved by technology

The overload sensor is usually composed of three orthogonal sensitive axes, which are sensitive to the overload in the three directions respectively. However, due to the manufacturing error of the aircraft, there is an installation deviation between the three sensitive axes of the overload sensor and the body coordinate system of the aircraft. It has a certain influence on the identification of aerodynamic parameters of the aircraft, especially when the overload of one or two directions of the aircraft is relatively large, while the overload of other directions is relatively small, the direction of large overload will superimpose a deviation on the sensitive axis of small overload amount, causing the overload measurement value to be inconsistent with the real value

Taking a high lift-to-drag ratio aircraft as an example, when the normal overload is 25 times that of the axial overload, the installation deviation of 40′ will result in a 30% measurement error in the axial overload measurement, which has great influence on the identification of aerodynamic parameters. big impact

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