METHOD OF DETECTING VIBRATION SOURCES ON AIRCRAFT STRUCTURE USING 3D VISUALIZATION OF MEASUREMENT RESULTS Russian patent published in 2024 - IPC G01M7/00 G06F17/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to vibration measurements and can be used during certification tests of aircraft (AC). Method provides for measurement of vibration by means of vibration transducers and measurement of parameters of aircraft flight modes synchronously with measurement of vibration during the entire duration of aircraft flight. At that, vibration information is additionally divided along the whole duration of flight into sections with duration, depending on accuracy of determining the moment of occurrence of vibration sources, specified in accordance with the task of identifying a vibration source. Each section is processed to obtain a frequency response of vibration, obtaining a continuous set of graphs of these frequency characteristics with a time step for the entire duration of the flight. Further, the flight mode parameters records are processed with the same pitch, a single graph is formed in the format of three-dimensional visualization of the obtained processing results on three mutually perpendicular axes. Parameters of flight modes are established, which were at the moment of vibration frequency characteristics change, after which the final decision is made on the reason for the change in the parameters of the flight modes of the aircraft at this moment, which indicates the appearance of vibration sources which change the frequency characteristics of the vibration. And depending on the detected vibration sources, the vibration measurements processing technique is selected, providing reliability of comparison of obtained results with norms for vibration, established in normative documents.

EFFECT: higher validity of different vibration sources vibration types and their characteristics evaluation when compared to normative requirements.

1 cl, 5 dwg