This paper presents a novel model abstraction and representation approach for the application of model-based reasoning (MBR) to helicopter powertrain diagnostics. Although the basic principles of MBR are well understood, its application to specific domains, especially in mechanical systems, has been restricted due to insufficient model fidelity. The traditional vibration analysis approach has b...

Research on damage of gears and gear pairs using vibration signals remains very attractive, because vibration signals from a gear pair are complex in nature and not easy to interpret. Predicting gear pair defects by analyzing changes in vibration signal of gears pairs in operation is a very reliable method. Therefore, a suitable vibration signal processing technique is necessary to extract defe...

Wind turbines are subject to variable aerodynamic loads and extreme environmental conditions. Wind turbine components fail frequently, resulting in high maintenance costs. For this reason, gearbox condition monitoring becomes important since gearboxes are among the wind turbine components with the most frequent failure observations. The major challenge here is the detection of faults under the ...

The textile industry generates millions of tons waste annually, making this sector one the most polluting in world. objective research was to study energy potential three industrial wastes vegetable and animal origin: CW (card waste), SFW (short fibre waste) W (wool), using conventional flash pyrolysis at 500 °C 750 °C. thermogravimetric profiles were very different from W. In general, bio-oil ...

The main disadvantage of biodiesel is its high price. The price of biodiesel depends on various factors such as the price of oil, methanol, catalyst, and labor. Among dif-ferent economic factors, oil accounts for the largest share of input costs of biodiesel production. In this study, first, suitable heterogeneous catalysts were identified for biodiesel production. Several studies were carried ...

Abstract In comparison to fats, oils and grease (FOG) found in commercial industrial effluents, very little is known about FOG discharged at household level. To address this shortcoming, production was calculated following a year‐long monthly collection 2.3 kg/year per household, equivalent 0.8 capita. the United Kingdom, these numbers translate an annual estimated of 62 380 tonnes. Physico‐che...