Vector Fitting is an effective technique for rational approximation of LTI systems. It has been extended to fit the magnitude of the transfer function in absence of phase data. In this paper, magnitude Vector Fitting is modified to work on inequalities which the magnitude of the transfer function has to satisfy, instead of least squares approximation. The new interval version of the magnitude V...

Abstract— In this paper, input impedance of a vertical rod under lightning stroke is first computed by applying the method of moments (MoM) on the Maxwell’s equations. The circuit model is then achieved through applying modified vector fitting (MVF) on the computed input impedance. After then the equivalent circuit is again extracted for a few values of soil conductivity and rod radius. Finally...

Introduction: Robust broadband macromodelling techniques are of crucial importance for efficient time domain and frequency domain simulation of high-speed interconnect structures. The standard vector fitting (VF) algorithm starts from an S-parameter frequency response, sampled at a discrete set of frequencies. It computes a macromodel by minimising a weighted iterative cost function in the L2 s...

sensorless speed torque control of induction machines has been widely used in many industrial applications. the simple method of direct vector control can provide tacholess control as well as more complex approaches. in this method, the motor flux can be obtained by measuring voltage and current and integrating motor back electromotive force. the only required motor parameter is stator resistan...

In this paper, we develop a structure-preserving formulation of the data-driven vector fitting algorithm for case modally damped mechanical systems. Using structured pole-residue form transfer function second-order systems, propose two possible extensions barycentric formula system functions. Integrating these new forms within classical leads to algorithms that allow computation systems from da...