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In this paper, the coupling of finite element and boundary element, known as FEM-BEM coupling, is used to numerically treat electromagnetic levitation problem based on eddy current. Main aim is to determine the dynamic characteristic of the levitating body in presence of magnetic field. A novel 3D formulation has been adapted that combines Lagrangian description and BEM-FEM coupling method for this...
A new mathematical model of electric field (E) radiation by high voltage conductors of electrical power transmission line, expressed as Helmholtz equation, developed in terms of Voltage (V) is proposed in this paper. The work has taken into account the impact of conductor phase-sequence orientation, instantaneous voltage and insulated metallic object close to the transmission tower on electric fields...
This paper proposes an adaptive Neuro-Fuzzy control approach for controlling the link variables of a 4 degree-of-freedom Selective Compliant Assembly Robot Arm (SCARA) type robot arm / manipulator. In the real world environment, the mathematical models of many robots are often not accurate, due to the presence of continuous disturbances that effect their dynamic equations, in addition to errors in...
Transient Electromagnetic problems constitute an area of significant investigative effort. The principal computational issue in these problems is the solution of large system of differential algebraic equations (DAE's) obtained after Finite Element (FE) discretization. Model Order Reduction (MOR) Techniques provide a mechanism to generate reduced order models from the detailed description of the original...
Optimal control of a large dynamical system is accomplished by designing the control strategy on its low order approximation. The Large system is the Finite Element (FE) model of a heat conduction problem and its low order approximation is obtained using Krylov Subspace Projection. It is seen that this approach provides good dividends as the desired cost functional is minimized reasonably at substantially...
This paper considers the problem of modeling of a two-dimensional problem of heating of a nontrivial geometry. The system is described by Partial Differential Equations and a large no. of Ordinary Differential Equations are obtained through Finite Element method. The ODE model is reduced using SVD-Krylov decomposition technique. Finally a robust controller is designed which transfers the temperatures...
A modeling and Robust Control Strategy is presented for the pointing mechanism of a typical Altitude-Azimuth telescope. The nonlinear control problem is solved in two stages. In the first, feedback linearization is used to obtain a linear system, with possible uncertainty present owing to lack of exact cancelation in the feedback linearization stage. With these uncertainties, a Robust Control law...
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