A detailed methodology to develop a digital twin has many useful applications in the era of
technology 4.0. This study provides a framework to develop a digital twin for vibration …

The oilwell drilling fluid flows cause viscous and hydrodynamic forces on drill strings. This
effect is ignored or treated as a constant in most drill string models. The present study …

Chaotic oscillators find many applications in the field of cryptography and secure
communication engineering. This paper first details one such approach of applying a forced …

The BLDC motor is becoming more popular in electric vehicles than other motors because of
its high torque, robust control, etc. Antithetically, it is more challenging to regulate the torque …

Early estimation of the fatigue life of an oil well drill string reduces the risk associated with
drill string fatigue failures. In this study, a low-order computationally efficient bond graph …

This paper aims at develo** an iterative method which permits to estimate the parameters
of single-input single-output (SISO) large-scale nonlinear systems, described by …

Purpose The brushless direct current motor is gaining attention due to its dynamic
characteristics, such as high density, power, and efficiency, but the vibration and noise …

This paper describes the modelling and implementation of a sensorless control system
(back-EMF control) on a brushless DC motor used in a traction drive system for an electric …

In order to understand and to predict cable effects on structures, three-dimensional
numerical models for a stranded cable and a beam–cable system consisting of a cantilever …

The bit-bounce is detrimental to the service life of drillstring and bit. This study highlights the
influence of axial excitation and torsional excitation on the bit-bounce in horizontal well …