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2017

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Performance Analysis Of The Link Selection For Secure Device-To-Device Communications With An Untrusted Relay, Sonia Naderi, Mohammad Reza Javan Jan 2017

Performance Analysis Of The Link Selection For Secure Device-To-Device Communications With An Untrusted Relay, Sonia Naderi, Mohammad Reza Javan

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, we study the performance of the selection combining and switch and stay combining methods in secure cooperative device-to-device (D2D) communications underlying a cellular network where an untrusted amplify and forward relay helps D2D communications. In our model, we specifically consider the interference from the cellular system over the D2D pair and the interference from the D2D pair over the cellular system. We assume that D2D communication is performed in such a way that the required outage probability of the cellular system is preserved. We obtain an exact closed-form expression for the lower bound of secrecy outage probability …

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High Inductance Fractal Inductors For Wireless Applications, Akhendra Kumar Padavala, Bheema Rao Nistala Jan 2017

High Inductance Fractal Inductors For Wireless Applications, Akhendra Kumar Padavala, Bheema Rao Nistala

Turkish Journal of Electrical Engineering and Computer Sciences

This paper presents fractal-based inductors for industrial, scientific, and medical applications in a frequency range of 3--500 MHz. The proposed inductors are designed based on the Hilbert space-filling curve and omega-shaped space-filling curve. The fractal inductors are designed and simulated by using a full wave high frequency structural simulator. The Hilbert curve-based fractal loop inductor and omega curve-based fractal loop inductor achieve improvements in the inductance value of 21% to 31% and 11% to 30.88%, respectively, over reported standard inductors. The printed inductors are constructed on 3.2 mm RT/Duroid 5770 substrate and measured with a network analyzer (E8363B). It was …

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Median Filtering Detection Based On Variations And Residuals In Image Forensics, Kang Hyeon Rhee Jan 2017

Median Filtering Detection Based On Variations And Residuals In Image Forensics, Kang Hyeon Rhee

Turkish Journal of Electrical Engineering and Computer Sciences

To attain a robust feature vector for median filtering detection (MFD) in digital forgery images, this paper presents a short feature vector that is made up of three types of feature sets. The first set is defined by the variation to be the 3-D length in the gradient difference of the intensity values of the adjacent row and column line pairs in the image, respectively. The second set is defined by the variation in the coefficient difference of the Fourier transform to be the 3-D length in the adjacent line pairs. The last set is defined by the residual image …

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Experimental Analysis Of The Temperature Dependence Of The Brillouin Gain Spectrum In Short-Length Single-Mode Fiber, Murat Yücel, Hali̇m Haldun Göktaş, Murat Yücel, Nai̇l Ferhat Öztürk, Abdullah Erkam Gündüz Jan 2017

Experimental Analysis Of The Temperature Dependence Of The Brillouin Gain Spectrum In Short-Length Single-Mode Fiber, Murat Yücel, Hali̇m Haldun Göktaş, Murat Yücel, Nai̇l Ferhat Öztürk, Abdullah Erkam Gündüz

Turkish Journal of Electrical Engineering and Computer Sciences

The Brillouin backscattered wave was examined in a short-length single-mode fiber at different ambient temperatures using a 1553-nm wavelength laser source. To obtain Brillouin scattering depending on the temperature change in a 95-m long single-mode fiber cable, the Brillouin optical time domain reflectometry (BOTDR) technique was used. In this technique, a 1553 nm wavelength signal was sent from one side of the test fiber. The FC/APC connector was attached to the other end of the test fiber. The temperature parameters of the single-mode fiber cables of different brands and types can be obtained using Brillouin scattering. The Brillouin frequency shift …

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Concurrent Optimal Design Of Tcsc And Pss Using Symbiotic Organisms Search Algorithm, Muwaffaq Alomoush Jan 2017

Concurrent Optimal Design Of Tcsc And Pss Using Symbiotic Organisms Search Algorithm, Muwaffaq Alomoush

Turkish Journal of Electrical Engineering and Computer Sciences

The symbiotic organisms search (SOS), which has been recently introduced, is a robust powerful metaheuristic global optimizer. This nature-inspired algorithm imitates the symbiotic interaction strategies in an ecosystem exercised by organisms involved in interrelationships to survive and reproduce. One of the main beneficial features of the SOS in contrast to many other competent metaheuristic algorithms is that the algorithm does not need any specific algorithm parameters or tuning process. This paper applies the SOS algorithm to simultaneously design optimal controllers of a power system equipped with both a power system stabilizer (PSS) and a thyristor-controlled series compensator (TCSC). The algorithm …

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Prognosis Of Muscular Dystrophy With Extrinsic And Intrinsic Descriptors Through Ensemble Learning, Sathyavikasini Kalimuthu, Vijaya Vijayakumar Jan 2017

Prognosis Of Muscular Dystrophy With Extrinsic And Intrinsic Descriptors Through Ensemble Learning, Sathyavikasini Kalimuthu, Vijaya Vijayakumar

Turkish Journal of Electrical Engineering and Computer Sciences

Muscular dystrophy is a neuromuscular disorder that impairs the functioning of the locomotive muscles. Large deletion and duplication mutations in the gene sequences pave the way for these muscular dystrophies. Any heritable change can be used as input in computational studies such as pattern and classification models. Mutated gene sequences are generated by adopting the positional cloning approach on the reference cDNA sequence with mutational information from the Human Gene Mutational Database (HGMD). The extrinsic and intrinsic descriptors of the mutated gene sequence are indispensable to identifying the disease. This work describes a computational approach of building a disease classification …

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Generalized Referenceless Image Quality Assessment Framework Using Texture Energy Measures And Pattern Strength Features, Jayashri Bagade, Kulbir Singh, Yogesh Dandawate Jan 2017

Generalized Referenceless Image Quality Assessment Framework Using Texture Energy Measures And Pattern Strength Features, Jayashri Bagade, Kulbir Singh, Yogesh Dandawate

Turkish Journal of Electrical Engineering and Computer Sciences

Referenceless image quality assessment is a challenging and critical problem in today's multimedia applica\-tions. Texture patterns in images are normally at high frequencies compared to lower ones. Due to the effect of distortions during acquisition, compression, and transmission, texture deviation artifacts are generated that cause a granular effect in the image. Other artifacts, such as blocking, affect high frequencies in an image, causing distorted edges. Combining the analysis of texture deviation and other artifacts helps in determining the quality of an image. The proposed approach uses variation in the energy of pixels to quantify the quality of an image. These …

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A Novel Optical Flow-Based Representation For Temporal Video Segmentation, Samet Akpinar, Ferdanur Alpaslan Jan 2017

A Novel Optical Flow-Based Representation For Temporal Video Segmentation, Samet Akpinar, Ferdanur Alpaslan

Turkish Journal of Electrical Engineering and Computer Sciences

Temporal video segmentation is a field of multimedia research enabling us to temporally split video data into semantically coherent scenes. In order to develop methods challenging temporal video segmentation, detecting scene boundaries is one of the more widely used approaches. As a result, representation of temporal information becomes important. We propose a new temporal video segment representation to formalize video scenes as a sequence of temporal motion change information. The idea here is that some sort of change in the optical flow character determines motion change and cuts between consecutive scenes. The problem is eventually reduced to an optical flow-based …

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New Approach To Design A Compact Triband Bandpass Filter Using A Multilayer Structure, Sohrab Majidifar, Mohsen Hayati Jan 2017

New Approach To Design A Compact Triband Bandpass Filter Using A Multilayer Structure, Sohrab Majidifar, Mohsen Hayati

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, a triband bandpass filter is presented using a dual-layer structure. Three H-shaped resonators are utilized in the proposed structure. The first and third resonators are placed at the top and bottom layers, respectively. The second resonator is divided into two parts: one half is on the top and the other half is at the bottom. The effective permittivity at the first and second layers is different, resulting in different resonant frequencies. The fabricated triband bandpass filter operates at 5.44/6.98/8.36 GHz, with fractional bandwidths of 6.6% 6% 2.9% and measured minimal insertion losses of 1.9/1.7/2 dB.

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Design Of A Sharp Response Microstrip Lowpass Filter Using Taper Loaded And Radial Stub Resonators, Sohrab Majidifar, Mohsen Hayati Jan 2017

Design Of A Sharp Response Microstrip Lowpass Filter Using Taper Loaded And Radial Stub Resonators, Sohrab Majidifar, Mohsen Hayati

Turkish Journal of Electrical Engineering and Computer Sciences

This paper proposes a compact microstrip lowpass filter with a wide stopband and a very sharp roll-off. This structure consists of two dual taper-loaded resonators that are connected to the radial stubs. The resonators are described using an LC model, and its Z- and S-parameters are extracted as a function of the LC component. In the proposed filter, cut-off frequency is placed at 1.76 GHz, roll-off rate is higher than 142 dB/GHz, insertion loss is less than 0.42 dB from DC to 1.5 GHz, and rejection is greater than -24 dB from 1.88 to 15.2 GHz. The proposed filter is …

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Broadband High Power Stripline Compact Multisection Coupled-Line Coupler For Vhf And Uhf Applications, Mehdi Taherkhani, Arash Ahmadi Jan 2017

Broadband High Power Stripline Compact Multisection Coupled-Line Coupler For Vhf And Uhf Applications, Mehdi Taherkhani, Arash Ahmadi

Turkish Journal of Electrical Engineering and Computer Sciences

In this study, a broadband stripline multisection coupled-line coupler is designed and fabricated. The coupler has 50 dB coupling in the frequency range of 30 to 1000 MHz. The coupler is designed by cascading several unit section couplers consisting of two unequal length coupled line sections connected by different length uncoupled transmission lines. The unequal length coupled line sections with different coupling coefficients introduce a degree of freedom for bandwidth improvement and can help to reduce the overall dimensions of the multisection coupler. A lumped-element compensating circuit is used in series with the coupling port of the coupler to flatten …

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An Electronic Portable Device Design To Spectroscopically Assess Fruit Quality, Ali̇ Sarikaş, Merve Doğruyol Başar Jan 2017

An Electronic Portable Device Design To Spectroscopically Assess Fruit Quality, Ali̇ Sarikaş, Merve Doğruyol Başar

Turkish Journal of Electrical Engineering and Computer Sciences

As a rapid and nondestructive sensing technique, reflection spectroscopy is useful in monitoring and managing horticultural production; in other words, the ripening of fruits and vegetables can be evaluated using reflection spectroscopy. Based on laboratory data obtained from an ultraviolet/visible/near-infrared (UV/Vis/NIR) spectrophotometer with a diffuse reflectance accessory, we developed a prototype handheld device. The device operates at a range of 400 nm to 1100 nm (blue, green, red, and NIR). LEDs, photodiodes, a microcontroller, digital-to-analog converters, a graphical LCD display, and a keypad were used for instrumentation. With our user-friendly software interface, measurements can be performed and controlled in real …

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A New Proposal For The Design Of Hybrid Ac/Dc Microgrids Toward High Power Quality, Pouria Goharshenasan Khorasani, Mahmood Joorabian, Seyed Ghodratolah Seifosadat Jan 2017

A New Proposal For The Design Of Hybrid Ac/Dc Microgrids Toward High Power Quality, Pouria Goharshenasan Khorasani, Mahmood Joorabian, Seyed Ghodratolah Seifosadat

Turkish Journal of Electrical Engineering and Computer Sciences

Considering the advantages of DC microgrids, the extension of the conventional AC distribution grid can be implemented using a DC microgrid. This justifies the realization of a hybrid AC/DC microgrid. In the present study, a new global solution is presented to improve the power quality and to fully compensate the reactive power of an AC microgrid using DC bus capacity while introducing a new design for a hybrid AC/DC microgrid. In the new design, back-to-back connections of two series and parallel converters, as well as the presentation of new controllers and simultaneous utilization of an earthing switch, are proposed. The …

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Joint Transceiver Fir Filter Design For Multiuser Mimo Channel Shortening Equalization And Full Equalization Using Channel Duality, Bariş Yüksekkaya, Cenk Toker Jan 2017

Joint Transceiver Fir Filter Design For Multiuser Mimo Channel Shortening Equalization And Full Equalization Using Channel Duality, Bariş Yüksekkaya, Cenk Toker

Turkish Journal of Electrical Engineering and Computer Sciences

In this work, joint transceiver filter design for channel shortening equalization is studied for a multiuser multiple input multiple output (MIMO) frequency selective channel. We develop algorithms for the multiuser MIMO, broadcast, multiple access, and interference channel models, where the link between these models is established via channel duality. We also provide an algorithm for full equalization of these channel models as a special case of the proposed channel shortening equalizer.The main contributions of this paper are investigating the multiuser scenario for the joint transceiver design for MIMO channel shortening equalization and extending the channel duality theorem to shortening equalization …

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Multiresponse Optimization To Improve The Torque Behavior Of An Outer-Rotor Permanent-Magnet Machine Using Gray Relational Analysis Based On The Taguchi Method, Yusuf Özoğlu Jan 2017

Multiresponse Optimization To Improve The Torque Behavior Of An Outer-Rotor Permanent-Magnet Machine Using Gray Relational Analysis Based On The Taguchi Method, Yusuf Özoğlu

Turkish Journal of Electrical Engineering and Computer Sciences

The torque behavior of an outer-rotor surface-mounted permanent-magnet machine is improved by identifying seven pertinent design variables, including rotor height. The optimal design variables are revealed by analyzing 18 experiments determined by the Taguchi method for the minimum torque ripple, minimum total harmonic distortion of the induced voltage, and maximum average torque. In addition, the optimal design variables are obtained very quickly by using gray relational analysis based on the Taguchi method with the single response of the gray relational grade instead of multiple responses. A considerable amount of multiresponse improvement is achieved according to the results of the two …

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Designing A Regulatory Framework For Efficient Integration Of Distributed Generation Technologies, Mohammad Jooshaki, Ali Abbaspour, Mahmud Fotuhi Firuzabad, Moein Moeini-Aghtaie Jan 2017

Designing A Regulatory Framework For Efficient Integration Of Distributed Generation Technologies, Mohammad Jooshaki, Ali Abbaspour, Mahmud Fotuhi Firuzabad, Moein Moeini-Aghtaie

Turkish Journal of Electrical Engineering and Computer Sciences

This paper focuses on the designing procedure of a regulatory framework in distribution networks with the main goal being to facilitate the integration of distributed generation (DG) units. The proposed framework is based on the concept of the reward penalty scheme (RPS) and creates effective financial incentives for distribution companies (DISCOs) in improving the quality of their services by applying DG units. To achieve this goal, reliability indices and annual energy losses of a distribution network are considered as two significant measures used in designing the structure of several RPSs. Employing these schemes, the regulators can quantify the quality of …

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Ekf-Based Self-Regulation Of An Adaptive Nonlinear Pi Speed Controller For A Dc Motor, Omer Saleem, Urwa Omer Jan 2017

Ekf-Based Self-Regulation Of An Adaptive Nonlinear Pi Speed Controller For A Dc Motor, Omer Saleem, Urwa Omer

Turkish Journal of Electrical Engineering and Computer Sciences

This paper presents a robust adaptive nonlinear proportional--integral (ANPI) scheme to control the speed of a direct-current (DC) motor. Unlike proportional--integral--derivative (PID) controllers, PI controllers have a simpler structure and they deliver effective control effort. However, due to inadequate controller gains, they are often unable to simultaneously improve the transient as well as the steady-state response of the system. A nonlinear PI (NPI) controller alleviates these issues and delivers a good response. In this research, the proportional and integral gains of the NPI controller are dynamically modulated via a nonlinear sigmoidal function (SiF) of the error dynamics of the motor's …

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Automated Module For Characterization Of Reference Standards Of Capacitance By Impedance-Matrix Method, Satish Singh, Thomas John Jan 2017

Automated Module For Characterization Of Reference Standards Of Capacitance By Impedance-Matrix Method, Satish Singh, Thomas John

Turkish Journal of Electrical Engineering and Computer Sciences

An automated module has been developed, implemented, and validated for the characterization of four-terminal-pair capacitance standards using an impedance-matrix method. These air-dielectric capacitance standards are being used as reference or transfer standards of capacitance at high frequency across national metrology institutes worldwide. In the reported work, an automated characterization module performs the acquisition of reference capacitance and residual capacitive parameters from an ultraprecision capacitance bridge. It also acquires single-port reactances of the capacitance standard from an impedance analyzer at frequencies ranging from 40 MHz to 100 MHz. The acquired capacitive and reactance parameters are stored structurally in arrays from where …

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Multiobjective Distributed Model Predictive Control Method For Facility Environment Control Based On Cooperative Game Theory, Huanliang Xu, Zhaoyu Zhai, Ke Wang, Shougang Ren, Haoyun Wang Jan 2017

Multiobjective Distributed Model Predictive Control Method For Facility Environment Control Based On Cooperative Game Theory, Huanliang Xu, Zhaoyu Zhai, Ke Wang, Shougang Ren, Haoyun Wang

Turkish Journal of Electrical Engineering and Computer Sciences

In order to achieve better control performance within the facility environment, this paper proposes a distributed model predictive control method, aiming at increasing the control precision of actuators, reducing energy consumption and equipment loss at the same time. Regarding optimizing this facility environment model, it could be treated as a multiobjective optimization problem. Referring to the cooperative game theory, each objective is regarded as a gamer. Each gamer considers both its own interests and other gamers' interests to achieve a balanced result when cooperation is achieved. The simulation experiments illustrate that the proposed control method is able to adjust the …

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Developing A Model And Software For Energy Efficiency Optimization In The Building Design Process: A Case Study In Turkey, Özgür Bayata, İzzetti̇n Temi̇z Jan 2017

Developing A Model And Software For Energy Efficiency Optimization In The Building Design Process: A Case Study In Turkey, Özgür Bayata, İzzetti̇n Temi̇z

Turkish Journal of Electrical Engineering and Computer Sciences

Buildings are responsible for 40% of the primary energy consumption in the world. Recent studies have revealed that the energy efficiency and environmental impact of buildings are two very important criteria to consider during the process of building design for the future of our world. By considering the initial investment cost and its importance for investors, a problem with three objective functions has emerged with 16 building energy systems and 24 construction material alternatives. The aim of this work is to develop a methodology and software to solve multiobjective building optimization problems. Thus, two different software tools have been developed …

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Multiverse Optimized Fuzzy-Pid Controller With A Derivative Filter For Load Frequency Control Of Multisource Hydrothermal Power System, Amit Kumar, Sathans Suhag Jan 2017

Multiverse Optimized Fuzzy-Pid Controller With A Derivative Filter For Load Frequency Control Of Multisource Hydrothermal Power System, Amit Kumar, Sathans Suhag

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, a multiverse optimized (MVO) fuzzy PID controller with a derivative filter (fuzzy-PIDF) is proposed for the load frequency control (LFC) of a two-area multisource hydrothermal power system. The superiority of the MVO algorithm is demonstrated by comparing the system LFC performance with integral and fuzzy-PIDF controllers, both optimized using MVO, as well as some of the recent heuristic optimization techniques such as the ant lion optimizer, gray wolf optimizer, differential evolution, bacterial foraging optimization algorithm, and particle swarm optimization. To the best of the knowledge of the authors, the use of the MVO technique has not yet …

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Time-Jerk Optimal Trajectory Planning Of A 7-Dof Redundant Robot, Shaotian Lu, Jingdong Zhao, Li Jiang, Hong Liu Jan 2017

Time-Jerk Optimal Trajectory Planning Of A 7-Dof Redundant Robot, Shaotian Lu, Jingdong Zhao, Li Jiang, Hong Liu

Turkish Journal of Electrical Engineering and Computer Sciences

In order to improve the efficiency and smoothness of a robot and reduce its vibration, an algorithm called the augmented Lagrange constrained particle swarm optimization (ALCPSO), which combines constrained particle swarm optimization with the augmented Lagrange multiplier method to realize time-jerk (defined as the derivative of the acceleration) optimal trajectory planning is proposed. Kinematic constraints such as joint velocities, accelerations, jerks, and traveling time are considered. The ALCPSO algorithm is used to avoid local optimization because a new particle swarm is newly produced at each initial time process. Additionally, the best value obtained from the former generation is saved and …

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Modeling And Control Of A Permanent-Magnet Brushless Dc Motor Drive Using A Fractional Order Proportional-Integral-Derivative Controller, Swapnil Khubalkar, Anjali Junghare, Mohan Aware, Shantanu Das Jan 2017

Modeling And Control Of A Permanent-Magnet Brushless Dc Motor Drive Using A Fractional Order Proportional-Integral-Derivative Controller, Swapnil Khubalkar, Anjali Junghare, Mohan Aware, Shantanu Das

Turkish Journal of Electrical Engineering and Computer Sciences

This paper deals with the speed control of a permanent-magnet brushless direct current (PMBLDC) motor. A fractional order PID (FOPID) controller is used in place of the conventional PID controller. The FOPID controller is a generalized form of the PID controller in which the order of integration and differentiation is any real number. It is shown that the proposed controller provides a powerful framework to control the PMBLDC motor. Parameters of the controller are found by using a novel dynamic particle swarm optimization (dPSO) method. The frequency domain pole-zero (p-z) interlacing method is used to approximate the fractional order operator. …

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Led Printers And Safe Fonts As Effective Protection Against The Formation Of Unwanted Emission, Ireneusz Kubiak Jan 2017

Led Printers And Safe Fonts As Effective Protection Against The Formation Of Unwanted Emission, Ireneusz Kubiak

Turkish Journal of Electrical Engineering and Computer Sciences

Due to the widespread use of computer equipment, electromagnetic protection of processed data is still an issue. Structurally modified commercial equipment is used to protect devices against this phenomenon. The acquisition costs of such modified devices are enormous. However, the market offers information devices with very low susceptibility to electromagnetic infiltration. Safe fonts are a new solution in the protection of sensitive information against electromagnetic infiltration processes. The use of safe fonts not only increases resistance to electromagnetic eavesdropping but also makes it impossible. These devices are computer printers that use a slat with hundreds of LEDs arranged in several …

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Planar Inverted-F Antenna For Universal Serial Bus Dongle Applications, Hassan Tariq Chattha, Muhammad Nasir, Qamar Hussain Abbasi, Yi Huang, Saqer Saleh Aljaafreh Jan 2017

Planar Inverted-F Antenna For Universal Serial Bus Dongle Applications, Hassan Tariq Chattha, Muhammad Nasir, Qamar Hussain Abbasi, Yi Huang, Saqer Saleh Aljaafreh

Turkish Journal of Electrical Engineering and Computer Sciences

A simple planar inverted-f antenna for universal serial bus dongles covering the frequency from 1.6 GHz to more than 3.6 GHz in a single band is presented in this paper. The height of the planar inverted-f antenna is only 3 mm and the dimensions of the ground plane are set equal to the usual size of a universal serial bus dongle (20 mm $\times $ 55 mm). For further enhancement in impedance bandwidth, a rectangular strip is etched on the ground plane. The frequency bands covered by this antenna include LTE / AWS / UMTS (1700), DCS (1800), PCS / …

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Cavitation Detection In Centrifugal Pumps Using Pressure Time-Domain Features, Pouya Samanipour, Javad Poshtan, Hamed Sadeghi Jan 2017

Cavitation Detection In Centrifugal Pumps Using Pressure Time-Domain Features, Pouya Samanipour, Javad Poshtan, Hamed Sadeghi

Turkish Journal of Electrical Engineering and Computer Sciences

Condition monitoring of centrifugal pumps is vital due to their crucial role in industries. One of the most prevalent faults in pumps is cavitation, which can cause mechanical faults or even failure in the pump. In this paper, an approach is suggested to detect cavitation in a centrifugal pump using time-domain analysis of the pressure signal residual. First, pressure and torque signals are obtained using a model of the electro-pump, and then pressure deviation from the pump performance curve is defined as a residual. The residual time-domain features are extracted and applied as inputs to a self-organizing map (SOM) neural …

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Fractional-Order Controller Design In Frequency Domain Using An Improved Nonlinear Adaptive Seeker Optimization Algorithm, Mano Ranjan Kumar, Vishwa Deepak, Subhojit Ghosh Jan 2017

Fractional-Order Controller Design In Frequency Domain Using An Improved Nonlinear Adaptive Seeker Optimization Algorithm, Mano Ranjan Kumar, Vishwa Deepak, Subhojit Ghosh

Turkish Journal of Electrical Engineering and Computer Sciences

Two nonlinear adaptive versions of the conventional seeker optimization algorithm (SOA) have been proposed for the design of fractional-order controllers using frequency domain specifications. The highly nonlinear and undetermined nature of equations resulting from controller design specifications rules out obtaining a closed-form solution. In this regard, the controller design task has been formulated as an optimization problem and solved using modified variants of the SOA. With the nonlinear adaptation of tuning parameters, the proposed variants of the SOA increase the probability of finding global optima along with improved convergence speed. This has been achieved by incorporating exponential weighting and chaotic …

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Regularized Estimation Of Hammerstein Systems Using A Decomposition-Based Iterative Instrumental Variable Method, Vikram Saini, Lillie Dewan Jan 2017

Regularized Estimation Of Hammerstein Systems Using A Decomposition-Based Iterative Instrumental Variable Method, Vikram Saini, Lillie Dewan

Turkish Journal of Electrical Engineering and Computer Sciences

This paper presents a two-step instrumental variable (IV) method to obtain the regularized and consistent parameter estimates of the Hammerstein ARMAX model based on the bilinear parameterized form. The two-step identification method consists of estimating the bilinear parameters in the first step, followed by parameter reduction in the second step. An iterative identification method is proposed, based on the idea of separating the bilinear form in the two separable forms with partial parameters and solving the decomposed model forms iteratively. The IV-based estimation is integrated into the formulated decomposed structure by introducing the instruments constructed from the estimated auxiliary model …

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Active-Only Variable-Gain Low-Pass Filter For Dual-Mode Multiphase Sinusoidal Oscillator Application, Pipat Prommee, Narongsak Manositthichai, Fabian Khateb Jan 2017

Active-Only Variable-Gain Low-Pass Filter For Dual-Mode Multiphase Sinusoidal Oscillator Application, Pipat Prommee, Narongsak Manositthichai, Fabian Khateb

Turkish Journal of Electrical Engineering and Computer Sciences

This research presents an active-only low-pass (LP) filter whose pole frequency and gain are independently tunable by means of bias current manipulation. The realization of the proposed LP filter required one operational amplifier, two operational transconductance amplifiers, and two MOS transistors. The multiphase sinusoidal oscillator (MSO) was subsequently realized by cascading $n$ LP filters ($n$ = 3) and loop-backing the output of the last LP filter to the input of the first LP filter. Simulations were carried out and the results revealed that the MSO could simultaneously achieve low impedance voltage and high impedance current outputs without the circuit topology …

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Indirect Adaptive Neurofuzzy Hermite Wavelet Based Control Of Pv In A Grid-Connected Hybrid Power System, Sidra Mumtaz, Laiq Khan Jan 2017

Indirect Adaptive Neurofuzzy Hermite Wavelet Based Control Of Pv In A Grid-Connected Hybrid Power System, Sidra Mumtaz, Laiq Khan

Turkish Journal of Electrical Engineering and Computer Sciences

Owing to the evolution of the smart grid, the emergence of hybrid power systems (HPSs), and the proliferation of plug-in-hybrid electric vehicles, the development of efficient and robust maximum power point tracking (MPPT) algorithms for renewable energy sources due to their inherent intermittent nature has overwhelmed the power industry. In this paper, an incremental conductance (IC) based Hermite wavelet incorporated neurofuzzy indirect adaptive MPPT control paradigm for a photovoltaic (PV) system in a grid-connected HPS is proposed. The performance of the proposed adaptive Hermite wavelet incorporated neurofuzzy MPPT control paradigm is validated through a comprehensive grid-connected HPS test-bed developed in …

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