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The capability of the classification SVM, Tree Boost and Tree Forest in analyzing the DDSM dataset was investigated for the extraction of the mammographic mass features along with age that discriminates true and false cases. In the present study, SVM technique shows promising results for increasing diagnostic accuracy of classifying the cases witnessed by the largest area under the ROC curve (area...
Since a superconducting magnetic energy storage (SMES) unit with a self-commutated converter is capable of controlling both the active and reactive power simultaneously and quickly, increasing attention has been focused recently on power system stabilization by SMES control. In this study, a self-tuning control scheme for SMES is proposed and applied to automatic generation control (AGC) in power...
In this paper the problem of eliminating low frequency current oscillations in a grid connected fuel cell (FC) system is afforded. A novel control strategy aimed at limiting the detrimental effect of such variations, especially in terms of FC extracted power and lifetime, is proposed.
This paper proposes a set of sequence-decoupled resonant controllers constructed with an easy-to-implement structure. It shows that either positive-sequence or negative-sequence components of three-phase unbalanced AC signals can be regulated individually in the stationary frame, while conventional and widely used resonant controllers cannot separately cope with these two sequences. Consequently,...
Load-frequency control is the intrinsic function of the governor in the power plants. It would be used in variant structures depend on the controller type such as PID, adaptive, fuzzy or robust. Temporary droop structure governor (TDSG) was commonly used in hydro power plants (HPP). After representation of TDSG, this paper is dedicated to introducing a procedure for tuning TDSG parameters. The technique...
This paper discusses the problem of finite frequency positive real control for singularly perturbed systems based on GKYP lemma. The purpose of this study is to design a state feedback controller such that the resulting closed-loop system is stable, and achieves the extended strictly positive realness for singularly perturbed systems at low and high frequencies. By employing GKYP lemma, respectively,...
In this paper designing of multi-objective PID controller for load frequency control (LFC) based on adaptive weighted particle swarm optimization (AWPSO) has been proposed. Conventional methods such as Ziegler-Nichols and Cohen-Coon are based on trial-and-error and their best performances are achieved for first-order process. Single-objective population based methods such as genetic algorithm (GA)...
Window operations which are computationally intensive and data intensive are frequently used in image compression, pattern recognition and digital signal processing. Reconfigurable hardware boards provide a convenient and flexible solution to speed up these algorithms. This paper studies the effect of loop unrolling on the area, clock speed and throughput based on a data schedule method to find the...
This paper extends the limit-trajectory two-mode overmodulation ideal into single mode. The harmonic characteristics of them are analyzed and compared. Based on one TI TMS320LF 2407A DSP, the proposed method is verified with an open-loop V/F controlled diode-clamped three-level model inverter. With the test result, it is confirmed that single-mode limit-trajectory overmodulation technology is correct...
This paper describes the control of rigid-flexible closed chain systems using Variable Structure Control. Particularly a configuration called the Rapid Deployment Truss (RDT) structure will be analysed. The insertion of a frequency shaping filter is introduced into the feedback loop, so that high frequency vibrational modes are less excited due to the switching phenomena inherent in such controllers...
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