this paper concentrates on a new procedure which experimentally recognises gears and bearings faults of a typical gearbox system using a least square support vector machine (lssvm). two wavelet selection criteria maximum energy to shannon entropy ratio and maximum relative wavelet energy are used and compared to select an appropriate wavelet for feature extraction. the fault diagnosis method co...

Tables are one of the most powerful and useful design elements in current web document standards such as (X)HTML, CSS and XSL. Importantly, designers do not need to precisely specify the width of the table columns, instead the designer may allow these to adapt to the viewing context while still preserving the general design intended by the document author. Unfortunately, however, the adaptive l...

Strong background noise and complicated interfering signatures when implementing vibration-based monitoring make it difficult to extract the weak diagnostic features due to incipient faults in a multistage gearbox. This can be more challenging when multiple faults coexist. This paper proposes an effective approach to extract multi-fault features of a wind turbine gearbox based on an integration...

Planetary gearboxes are widely used in the drivetrain of helicopters and wind turbines. Any planetary gearbox failure could lead to breakdown of the whole drivetrain and major loss of helicopters and wind turbines. Therefore, planetary gearbox fault diagnosis is an important topic in prognostics and health management (PHM). Planetary gearbox fault diagnosis has been done mostly through vibratio...

Metal price is one of the most important parameters in the calculation of cut- off grade. The cut- off grade has the main role in determination of mine layout. Mine layout actuates mineable reserve, mine life and economic profitability. Not considering the uncertainty in metal prices can lead to a non-optimal layout. In this paper optimum underground mine layout is determined by expected utilit...

 Abstract—The power flow analysis of a gearbox isolation system is carried out in accordance with the structural characteristics of a gearbox. Numerical simulation is conducted to study the influence of major structural parameters on the power flow of a gearbox isolation system. The present research can provide a theoretical basis for the vibration isolation system design of a gearbox.