This research proposes a methodology to estimate the reliability of gearbox using life data analysis and predict Lifetime Use Estimation (LUE). Life involves collection historical field replacements perform statistical such as Weibull reliability. Remaining useful is estimated by Cumulative damage model data-driven methods. The first approach based on physics failure models degradation second o...

Abstract The knowledge of component temperatures during transient operation conditions is essential for an optimal design a gearbox. This because critical peak limit the transferable power as well load capacity. Moreover, understanding thermal behavior gearbox key to improving its efficiency. Therefore, Thermal Network Method (TNM) calculation program WTplus was extended calculate in gearboxes ...

Epicyclic gears are used in many applications because they can achieve a large torque/speed ratio in a compact package. In most gearboxes, the estimated spectrum of the vibration signal is symmetric and centered at the meshing frequency. For epicyclic gears, the estimated spectrum is typically asymmetric and the dominant frequency component does not occur at the meshing frequency. This is an im...

Wind turbines (WTs) are often operated in harsh and remote environments, thus making them more prone to faults costly repairs. Additionally, the recent surge wind farm installations have resulted a dramatic increase turbine data. Intelligent condition monitoring fault warning systems crucial improving efficiency operation of farms reducing maintenance costs. Gearbox is major component that lead...

A two-mass dynamic model of an electric vehicle is considered to obtain analytical dependences describing the gearshift process in a shaft-planetary gearbox. The calculations are based on optimal diagram shifting gears from low high without interruption power flow motor. At stage gear shifting, at which kinematic ratio gearbox changes u1 u2, Lagrange equations second kind used determine time an...

We present a mathematical framework for general overand underdetermined hybrid (switched) systems of differential-algebraic equations (HDAEs). We give a systematic formulation of HDAEs and discuss existence and uniqueness of solutions, the treatment of the switch points and how to perform consistent initialization at switch points. We show how numerical solution methods for DAEs can be adapted ...

In this article a new Modelica library to model vehicle power trains is discussed. An overview of the elements within the library is given, such as planetary gearsets, laminar clutches, torque losses, driver, warm up model. The library is demonstrated through the discussion of two illustrative examples, for drive cycle fuel consumption prediction and for investigating gearshift transition dynam...