CHOI-WILLIAMS TRANSFORM USAGE IN THE INVESTIGATE OF BEARINGS STATE OF GAS PUMPING UNIT
Keywords:: інформаційний модуль; дефект; часо-частотне перетворення; контроль
There are a number of unsolved scientific problems in vibration diagnostics, although the high level of its development. They are related to the development of technical equipment and methods of vibration control, in particular, vibration diagnostics of gas pumping unit. One of the power elements of the gas pumping unit is the bearings, the vibration state of the unit depends on their condition. There is conducted research on improving the vibroacoustic method of diagnosing the state of the gas pumping unit by processing signals that contain vibroacoustic information corresponding to different states of the bearings. The main purpose of the paper is to study the effectiveness of the application of the Choi–Williams transform for increasing the information of processing vibroacoustic signals in determining the state of bearing units of the gas pumping unit. There is shown the current state of diagnosis of bearing units. It is established that the most common method of determining the bearing current state is vibroacoustic control. The issue of using time-frequency analysis methods in the processing of vibroacoustic signals is studied. It is proposed to use the Choi-Williams transform for better signal detection and separation by eliminating high-frequency noise. The software structure of the vibration control system of the bearing unit state is given. An information module of vibration control was developed with the use of chosen transform. The results of vibroacoustic signal processing during modeling of typical bearing defects such as cracks and imbalances are demonstrated. Conclusions regarding the obtained results were formed. The scientific novelty of the obtained results occurred in proving the effectiveness of using the Choi-Williams transformation to study the condition of the bearing units of the GPA using the example of the presented model conditions. The development of an information module for monitoring the technical condition of bearing units of the HPA, which makes it possible to detect diagnostic signs of the condition of the unit, becomes of practical importance. Further scientific research is aimed at studying the possibilities of using the given approach to signal processing in real time, as well as the formation of a database of images of various types of defects of functional elements of the GPA.
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