Arash Kiyoumarsi

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Power supplies normally provide a constant output voltage. In most of the applications a DC-DC converter is controlled by a voltage mode or a current mode controller. The DC converters are employed to feed electric vehicles, telephone sets and civil invertors, or for induction motors and frequency control. In this regard, optimal exploitation of DC(More)
In this paper, we propose a MLP learning algorithm based on the parallel tangent gradient with modified variable learning rates, PTGVLR. Parallel tangent gradient uses parallel tangent deflecting direction instead of the momentum. Moreover, we use two separate and variable learning rates one for the gradient descent and the other for accelerating direction(More)
Static synchronous compensator (STATCOM) is a device capable of solving the power quality problems at the power system. These problems happen in milliseconds and because of the time limitation, it requires the STATCOM that has continuous reactive power control with fast response. In this way, optimal exploitation of STATCOM by classical controllers has been(More)
In this paper, an adaptive controller is designed to control an Electric Arc Furnace (EAF) electrode. For this purpose, a nonlinear model for EAF is considered. Piecewise-linearization method is used and based on the Lyapunov's method an adaptive control rule is achieved. EAF different operating conditions are considered and in each condition the system(More)
In this paper, the control of a double mass and spring system as a physical model of a flexible arm robot is considered. The main goal of design is to use an appropriate control method that produces suitable external torques such that the whole system can be completely stabilized and controlled. For this purpose, mathematical model of the system is required(More)
In this paper, a method for optimal measurement placement in the problem of static harmonic state estimation in power systems is proposed. At first, for achieving to a suitable method by considering the precision factor of the estimation, a procedure based on Genetic Algorithm (GA) for optimal placement is suggested. Optimal placement by regarding the(More)
In this paper, a double-mass and spring system is considered as a benchmark for future studies on flexible arm robots. By using an appropriate control method and applying suitable external torques, the system can be completely stabilized and controlled. This requires the exact mathematical model of system. To achieve mathematical description, the system(More)
This paper examines transient finite element solutions of an 100 MVA three phase electric arc furnace (EAF). In practice, it was observed that there were a few high voltage arcs between upper side of high-carrying-current electrodes and the EAF roof. In order to specify the operation and performance of this EAF, a two dimensional time stepping finite(More)