Intelligent Bearing Fault Diagnosis Method Combining Mixed Input and Hybrid CNN-MLP model

Rolling bearings are one of the most widely used bearings in industrial machines. Deterioration in the condition of rolling bearings can result in the total failure of rotating machinery. AI-based methods are widely applied in the diagnosis of rolling bearings. Hybrid NN-based methods have been shown to achieve the best diagnosis results. Typically, raw data is generated from accelerometers mounted on the machine housing. However, the diagnostic utility of each signal is highly dependent on the location of the corresponding accelerometer. This paper proposes a novel hybrid CNN-MLP model-based diagnostic method which combines mixed input to perform rolling bearing diagnostics. The method successfully detects and localizes bearing defects using acceleration data from a shaft-mounted wireless acceleration sensor. The experimental results show that the hybrid model is superior to the CNN and MLP models operating separately, and can deliver a high detection accuracy of 99,6% for the bearing faults compared to 98% for CNN and 81% for MLP models

POLYMORPHISM OF THE MATRIX METALLOPROTEASES 2 AND 9 AND AORTIC STIFFNESS IN ADULTS WITH ARTERIAL HYPERTENSION

Aim. To study the parameters of aortic stiffness and polymorphisms of matrix metalloproteases genes MMP2 (-1306) and MMP9 (-1564) in patients with arterial hypertension (AH) of young and middle age.Material and methods. Totally, 58 patients studied with AH, age 25-60 y.o., and 59 healthy volunteers. The pulse wave velocity (PWV) assessed, and augmentation index (arteriography on TensioClinic TL1, Hungary). The specimens of DNA extracted, from blood leucocytes, and gene typing of promotor regions of the genes MMP2 (-1306) and MMP9 (-1564).Results. Genotypes MMP2 (-1306) (CT and ТТ) are found in AH patients with the signs of metabolic syndrome (MS) 1,72 times more commonly than in controls (p=0,23). Genotypes MMP9 (-1564) (CT and ТТ) are slightly more common in the general AH group comparing to controls (OR=1,4; p=0,39). In AH patients with no MS signs the genotypes MMP9 (-1564) (CT and ТТ) are predominant and found 2,66 times more frequently, than in the healthy (р=0,04). In cases of high PWV in AH, genotype MMP9 (-1564) (СТ and ТТ) is found 1,9 times more often than in controls with AH and normal PWV with no statistical significance (р=0,14).Conclusion. The polymorphism MMP9 (-1564 C/T) finding in AH patients can be used for prediction of additional risk for cardiovascular catastrophes with the individualized monitoring of collected factors