Vibration generated by a gear-set is a signal of its technical condition. Many papers have been published on relation between the vibration signal and the condition of a gear-set. It is convenient to investigate this relation by dividing the factors which have influence on vibration generated by a gear-set into four major groups: design, production technology, operational and change of conditio...

art of the Affordable Care Act (ACA) calls for the expansion of Medicaid in 2014, which is expected to cover about 17 million previously uninsured Americans. The Supreme Court’s recent ruling that the federal government cannot force states to expand their Medicaid programs complicates the issue, making it more difficult for health care systems operating in several states to develop efficient st...

Landing gear is a structural component of an aircraft to support the weight while it is on the ground and also to aid safe landing. A generic analytic model for linear dynamic analysis of landing gears, which captures responses of individual components, is seldom available in literature. In the present work an analytical model for the linear response analysis of landing gear is developed. The l...

In this study, a transient, non-Newtonian, mixed elastohydrodynamic lubrication (EHL) model of involute spur gear tooth contacts is proposed. Unlike the contact between two cylindrical rollers, spur gear contacts experience a number of time-varying contact parameters including the normal load, radii of curvature, surface velocities, and slide-toroll ratio. The proposed EHL model is designed to ...

The development of diagnostic methods for gear tooth faults in aerospace power transmission systems is an active research area being driven largely by the interests of military organisations or large aerospace organisations. In aerospace applications, the potential results of gear failure are serious, ranging from increased asset downtime to, at worst, catastrophic failure with life-threatening...

Due to the standardization of helical gear design parameters and the constraints involved in the design and manufacturing, the size of the helical gear pairs are higher than the required. To improve the gear efficiency and performance, optimizing the helical gear parameters became essential. While significant research efforts have developed for less constrained systems, design for over-constrai...

The paper presents the methodology of modelling tooth flanks of cylindrical gears in the CAD environment. The modelling consists in a computer simulation of gear generation. A model of tooth flanks is an envelope curve of a family of envelopes that originate from the rolling motion of a solid tool model in relation to a solid model of the cylindrical gear. The surface stereometry and topography...

In the field of Automation, Fuzzy Control Fuzzy control has significant merits which are utilized in intelligent controllers, especially for vibration control systems. This paper is concerned with the application aspects of the developed MR damper for landing gear system, to attenuate the sustained vibrations during the landing phase. Also a comparative study is made on the responses obtained f...