METHOD FOR IDENTIFYING SINUSOIDAL AND RANDOM VIBRATIONS AS PART OF A MIXED VIBRATION PROCESS MEASURED ON AN AERIAL VEHICLE Russian patent published in 2022 - IPC G01M7/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment, in particular, to vibration measurements taken during certification testing of aerial vehicles (AVs). In the method, vibrations are measured using vibrators at different points of the structures on the AV in the frequency band; the measurement materials are processed, resulting in the spectral power density of the vibration acceleration amplitudes; a graph of the spectral power density of the vibration acceleration amplitudes is formed in a frequency range with a frequency step allowing for an accurate frequency structure of the vibration process complying with the requirements of the regulatory documents for AV certification, while the frequencies of discrete components are determined on the graph with prominent levels of the vibration acceleration amplitudes. Additionally, the same vibration measurement materials are reprocessed, and a graph of the spectral power density of the vibration acceleration amplitudes is formed for reprocessing in the same frequency band with a higher frequency step selected based on the required accuracy of determining the spectral power density in this frequency band. The frequencies of the discrete components of the vibration acceleration amplitude values are determined herein from the graph. The vibration acceleration amplitude values from the primary analysis are then compared with the vibration acceleration amplitude values from the reprocessing. If the condition of equality of said amplitudes is met, a decision is made that sinusoidal components are present on the discrete frequencies found on the graph. If said condition is not met, a conclusion is made that a narrow-band random vibration is present and processing is required to obtain an amplitude spectrum to be compared with the requirements of the regulatory documents for AV certification.

EFFECT: higher accuracy and reliability of the end results of vibration measurement processing.

1 cl, 4 dwg