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Gears are very reliable parts of wind turbines and normally contribute for more than 5 years without failure when operated under fluctuating speed conditions. This case study presents the effectiveness of gear fault diagnosis techniques to highlight cracked tooth, chipped tooth and missing tooth gear under fluctuating speed conditions. Various measuring parameters such as overall vibration acceleration...
Local-energy scheme based on energy density within the PAW-GGA method has been applied to Fe(001)/TiC(001) coherent interfaces. Via Bader integration of the energy density, local energies of atomic regions are decided without the gauge dependent problem. By comparing the surface and interface supercells, we can clarify the contribution of each surface atom to the interface adhesion. The interface...
Herein, the study of electrical and morphological properties of SnO2/Au/SnO2 thin film is presented. The stacked multilayers were deposited on Si (100) / SiO2 substrate by e-beam evaporation using standard SnO2 and Au targets to get a total thickness of ∼ 75 nm. Aluminum mask was used to create an interface between pristine and 120 MeV Ni10+ irradiated (fluence-1×1012 and 5×1012 ions/cm2) region....
This paper presents the uncovered facts about control rectifiers based AC-DC systems using experimental investigation under various dynamic and steady state practical loading conditions at different nature of loads. The facts presented in this paper are very useful for the industries which are using controlled rectifiers based systems, battery charging systems, induction motor drive systems and heating...
Large number of substations have been upgraded to higher voltage level by loop in loop out of existing transmission lines to meet the increasing load demand. Therefore; large number of loops of different voltage levels has been created between substations. Transformers of different MVA ratings; percentage impedance and tap ratios have been installed at the substations. Presently there is no coordination...
This paper reviews the comparative performance of Support Vector Machine (SVM) using four different kernels, i.e., Linear, Polynomial, Radial Basis Function (RBF) and Sigmoid. Overall accuracy (OA), Kappa Index Analysis (KIA), Receiver Operating Characteristic (ROC) and Precision (P) have been considered as evaluation parameters in order to assess the predictive accuracy of SVM. Both high resolution...
A standard Composite Nonlinear Feedback (CNF) control law is designed for Twin Rotor Multi-Input Multi-Output System (TRMS). This proposed control law ensures minimum settling time and no overshoot in the response to desired input. TRMS linear model is considered for simulation purpose. The control law is composed of linear and nonlinear components. There is no switching element in the proposed law...
In this paper, adaptive speed control of a light weighted all-electric vehicle (EV) is presented for strict feedback form with unknown time delay. The EV is driven by DC motor. The unknown time delay has been compensated through the appropriately chosen Lyapunov-Krasovskii functional. In present work, state feedback control is presented via backstepping, applied to a strict feedback form of the EV...
The emergence of new technology calls for fundamental rethinking and transformational shifts in the way we look at government functions and its service provisioning to the public. Governments are increasingly being solicited to take on the roles of a facilitator and enabler — to collaborate with the public, private and community sectors in creating new digital channels and solutions to be closer to...
In this paper, discrete-time backstepping control is proposed for a light weighted all-electric vehicle. The electric vehicle (EV) is driven by DC motor. Firstly, state feedback control is presented via backstepping, applied to a strict feedback form of the EV system. Here Chebyshev Neural Network (CNN) is used to solve the causality contradiction problem in the strict feedback discrete-time EV system...
Intrusions in an information system are the activities that violate the security policy of the system, and intrusion detection is the process used to identify intrusions. Intrusion detection has been studied for approximately 20 years. Intrusion detection provides a way to identify intrusion and allow responses to attacks against the systems. We present a machine learning approach known as Genetic...
In this paper, nonlinear backstepping control is proposed for a light weighted all-electric vehicle. The electric vehicle (EV) is driven by DC motor. In present work, state feedback control is presented via backstepping, applied to a strict feedback form of the EV system. The control algorithm for the EV system is developed and a new European driving cycle (NEDC) test is performed to test the control...
This paper presents a sliding mode observer based controller for a class of uncertain systems. Exponential stabilizability for the uncertain systems is considered and the rate of convergence is estimated. The proposed observer based controller is designed using linear matrix inequality (LMI) approach. The observer and controller gains are obtained from the feasible solution of LMI. A numerical example...
Although various wireless access network technologies with different characteristics and performance level have been developed, no single network that can satisfy the anytime, anywhere, and any service wireless access needs of mobile users. A truly seamless mobile environment can only be realized by considering vertical and horizontal handoffs together. One of the major design issues in heterogeneous...
A method is reported to accurately and precisely control temperature of a solution sample to investigate non-thermal effects of radio frequency radiation (RFR) on pharmaceuticals. This method utilizes a transverse electromagnetic (TEM) cell connected in series with a radiation source. The temperature of a sample under study, within the TEM cell, is regulated using a combination of a fiber-optic thermometer...
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