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25,016 Article Results

Improvement of Fuzzy Based Practical Controller for Continuous Motion Control

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4183
Purtojo Purtojo , Heru S. B. Rochardjo , Gesang Nugroho , Herianto Herianto
This article presents a development of a fuzzy based nominal characteristic trajectory following (NCTF) controller for continuous motion control. A new structure is proposed in order to achieve excellent performance of tracking to a continuous reference input and also for point-to-point positioning task. The proposed structure maintains the NCTF controller simple configuration which is composed of a nominal characteristic trajectory (NCT) and a compensator. The compensator is based on a Mamdani type fuzzy controller. Its membership functions are designed according to the available information provided by NCT and the hardware specification. Controller performance was evaluated through simulation by comparing it with the existing method previously proposed for the fuzzy based NCTF controller. The tracking performance was evaluated by measuring responses of the system providing continuous sinusoidal signal input. The result indicates that substantial improvement is achieved in tracking of continuous reference inputs. Moreover, a better result is also obtained in performing point-to-point positioning task.DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.7008
Volume: 13
Issue: 1
Page: 114-123
Publish at: 2015-01-01

Nonlinear Equations Solving Base on Immune Genetic Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4190
Peng Qiong
A steam conversion of hydrocarbon mass balance of the nonlinear equations of the immune genetic algorithm method is researched in this paper. The nonlinear equations is transformed into nonlinear optimization problems; Tthe transformation process and implementation are discussed, this method is used to quickly and easily obtain the effective solution of the production technology. The production process used to solve practical problems, optimize production, increase economic efficiency. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6825 
Volume: 13
Issue: 1
Page: 174-179
Publish at: 2015-01-01

A Decoupling Structure of Controllable Reactor of Transformer Type

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4172
Yu He , Huatai Chen
In order to make controllable reactor of transformer type (CRT) working of safety, reliable and compensation effect is obvious, the principle of “high impedance, weak coupling” must be satisfied in the design of CRT structure. The magnetic integration technology used in the design of the ontology of CRT in this paper, a decoupling integrated core structure is proposed. This paper also calculates the leakage reactance and current of decoupling structure. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6724 
Volume: 13
Issue: 1
Page: 20-25
Publish at: 2015-01-01

Adaptive System Identification using Markov Chain Monte Carlo

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4184
Muhammad Ali Raza Anjum
One of the major problems in adaptive filtering is the problem of system identification. It has been studied extensively due to its immense practical importance in a variety of fields. The underlying goal is to identify the impulse response of an unknown system. This is accomplished by placing a known system in parallel and feeding both systems with the same input. Due to initial disparity in their impulse responses, an error is generated between their outputs. This error is set to tune the impulse response of known system in a way that every change in impulse response reduces the magnitude of prospective error. This process is repeated until the error becomes negligible and the responses of both systems match. To specifically minimize the error, numerous adaptive algorithms are available. They are noteworthy either for their low computational complexity or high convergence speed. Recently, a method, known as Markov Chain Monte Carlo (MCMC), has gained much attention due to its remarkably low computational complexity. But despite this colossal advantage, properties of MCMC method have not been investigated for adaptive system identification problem. This article bridges this gap by providing a complete treatment of MCMC method in the aforementioned context. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6925 
Volume: 13
Issue: 1
Page: 124-136
Publish at: 2015-01-01

Application of Wireless Sensor Network and GPRS Technology in development of Remote Monitoring System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4187
Mengxing Chang , Qiuhong Wang
The paper presents application of wireless sensor network and GPRS technolog in development of remote monitoring system. The remote monitoring system harnesses embedded technology, wireless sensor network and the GPRS mobile communication technology, to solve the problem of data transmission between data acquisition system and control equipment. This system is real-time, high reliability. This paper chooses ZigBee as protocol based on wireless sensor network. Wireless monitoring system using GPRS technology enables real-time, reliability has been greatly improved. Finally the successful application of intelligent home furnishing system proves the feasibility of this scheme. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6894 
Volume: 13
Issue: 1
Page: 151-158
Publish at: 2015-01-01

Comparison of LS-PWM with different modulation strategies for SVC PLUS

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4178
S.A Kamran , Mao Chengxiong
Urbanization is continuing around the world accompanied by a constantly growing demand for energy. For these reasons, new and efficient solutions for power transmission are required. To cope with these new challenges a novel SVC PLUS (Static Var Compensation SVC) for Reactive Power Compensation is designed and researched. SVC PLUS is an advanced STATCOM (Static Synchronous Compensator) with Modular Multilevel Converter (MMC) technology, also called (M-STATCOM). In this paper the M-STATCOM is simulated in PSCAD environment with 100 sub-modules per phase. Its static and dynamic characteristics are discussed. After compare and contrast different modulation schemes, harmonic contents in Level-shift sine pulse width modulation (LS-PWM) are found having least total harmonic distortions (THD) and with this modulation scheme converter can achieve more levels so it is found feasible to control the converter. The behaviour of circulating current with least ripples is also observed. In this paper, the traditional capacitor balance strategy is also modified.The viability of the MMCs as well as the effectiveness of the LS-PWM control method is confirmed by simulation. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6821 
Volume: 13
Issue: 1
Page: 76-84
Publish at: 2015-01-01

Effective Factors on the Generated Transient Voltage in the Wind Farm due to Lightning

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4175
M. A. Abd-Allah , Mahmoud N. Ali , A. Said
According to reports that had been published in many papers, wind turbines (WTs) fault due to lightning is one of the most difficult challenges. Lightning overvoltage lead to malfunction in the wind farm equipments. These improper functioning contain of malfunction electronic equipments and deformation of transformer winding and Surge arrester failures. The travelling waves which are generated due to high ground potential rise under lightning struck turbine cause these problems. To evaluate these cases, it must be performed an accurate analysis on the wave shape and level of the Lightning overvoltage and ground potential rise. This paper investigates the effective factors on the wave shape and level of the overvoltage, GPR and surge arrester burnout. These factors are included impulse Current-second characteristics, position of lightning, inception angle, multiple lightning strokes and chopped current.  ATP-EMTP simulation program is applied to analyze the lightning over-voltage of onshore wind farm. This paper provides a practical procedure of lightning protection. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6844
Volume: 13
Issue: 1
Page: 42-56
Publish at: 2015-01-01

Voltage Flicker Real-time Detection Based on Recursive Degree Method

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4173
Tiejun Cao
Traditional flicker detection methods accurately extract the amplitude envelope as the premise, the complexity of large amount of computation. This paper presents a new real-time detection of voltage flicker method, analysis method with recursive frequency carrier signal frequency; use of the adjacent three-point sampling data, the frequency carrier signal frequency, sampling frequency voltage flicker waveform obtained by the current envelope size. Of harmonic pollution by noise or flicker between the signals, the low-pass filtering results are not affected. Simulation results show that: The method to directly detect flicker signal, the process is simple, computational load and real time, tracking performance, with a certain anti-noise and inter-harmonic interference suppression capability, suitable for real-time detection of voltage flicker. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6826 
Volume: 13
Issue: 1
Page: 26-32
Publish at: 2015-01-01

Magnetically Controlled Quantum Teleportation of Multiple Arbitrary States Using the Bloch Catalyst

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4170
Moses Emetere
Quantum teleportation is at its advanced research stage and has attracted more novel discoveries in recent time. The Bloch NMR was used to highlight the specification for the construction of a virtual Magnetic-Not (M-Not) gate to analyze a two trans-sectional multiple arbitrary states. A new version of quantum manipulation for entanglement and disentanglement of particles was introduced. A new quantity known as the particle filter was discovered. The particle-filter acts like a catalyst via the use of transverse and longitudinal relaxations to speed-up teleportation of single qubit state from the sender to the intermediary and then to the receiver. The efficiency of the M-Not gates to filter both noise and excited qubit state during teleportation was shown. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6437 
Volume: 13
Issue: 1
Page: 1-9
Publish at: 2015-01-01

Improvement of Address Resolution Security in IPv6 Local Network using Trust-ND

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4193
Supriyanto Praptodiyono , Iznan H. Hasbullah , Mohamed Anbar , Raja Kumar Murugesan , Azlan Osman
The current Internet infrastructure IPv4 uses Address Resolution Protocol to resolve the neighbors MAC address if not known. IPv6 is the next generation communication protocol used today to overcome the exhaustion of IPv4 addresses. IPv6 uses Neighbor Discovery Protocol (NDP) to do the address resolution and not ARP. NDP lacks security and hence the address resolution mechanism is vulnerable to various attacks that include man-in-the-middle and Denial of Service. Secure Neighbor Discovery (SeND) mechanism that was introduced to solve this problem is highly complex and the message size is large. This paper introduces Trust-ND mechanism to secure the address resolution in IPv6 local network. Experiments were done and analysis on the experimental result shows the Trust-ND could decrease the complexity of SeND. The processing time of NDP message could be reduced from 1076 times for SeND mechanism to only 1.9 times for Trust-ND. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6929
Volume: 13
Issue: 1
Page: 195-202
Publish at: 2015-01-01

A Review on Speed Control Techniques of Separately Excited DC Motor

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4182
Mahmoud Zadehbagheri , Rahim Ildarabadi , Majid Baghaei Nejad
Nowadays, many moving devices receive their energy from a battery. DC motor is the most suitable option for these systems. In addition, the speed of these motors can be controlled easily and in the extensive range. Intelligent control methods are widely used in control of the industrial processes due to simplicity and high capabilities. In this paper, the fuzzy resistance speed controller has been designed and presented for DC motor. This controller stabilizes speed of motor in the desirable path despite changes of load torque or change of motor elements. One of the other features of this controller is the multivariate objective function which is able to supply dynamical behavior of the motor. Rapid response, permanent fault and low overshoot are about the other advantages of this method. DOI:  http://dx.doi.org/10.11591/telkomnika.v13i1.7004 
Volume: 13
Issue: 1
Page: 106-113
Publish at: 2015-01-01

A Review Paper on Torque Ripple Reduction in Brushless DC Motor Drives with Different Multilevel Inverter Topology

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4177
S. Arunkumar , S. Thangavel
This paper presents the overall review of torque ripple reduction techniques in brushless DC motors (BLDC) and different multilevel inverter topologies suitable for BLDC motor drives. BLDC motors are widely used for household applications due to its features of high reliability, simple frame, high efficiency, fast dynamic response, compact size and low maintenance, etc.. The switches are electronically commutated based on the information of rotor position detection. The position of the rotor is determined with the help of the sensor or sensorless techniques. Hence it is an electronically commutated motor. Because of this commutation, the ripples are generated in the electromagnetic torque and the power factor of AC mains gets affected. So, in order to improve the performance of these motors the ripple in the electromagnetic torque could be reduced and the power factor of the AC mains should be increased. An enormous review of different torque ripple reduction techniques and different multilevel inverter topologies suitable for torque ripple minimization and power quality improvement with different converter topologies are discussed. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6904
Volume: 13
Issue: 1
Page: 65-75
Publish at: 2015-01-01

Nonlinear Classifier Design Research Based on SVM and Genetic Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4188
Wenjuan Zeng , Haibo Gao
This paper presents a support vector machine (SVM) model structure, the genetic algorithm parameters of the model portfolio optimization model, and used for non-linear pattern recognition, the method is not only effective for linear problems, nonlinear problems apply effective; the law simple and easy, better than the multi-segment linear classifier design methods and BP network algorithm returns the error. Examples show the efficiency of its recognition of 100%. DOI:  http://dx.doi.org/10.11591/telkomnika.v13i1.6692 
Volume: 13
Issue: 1
Page: 159-165
Publish at: 2015-01-01

A Novel Compact Microstrip Lowpass Filter with Sharp Transition and Improved Stopband

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4179
Pingjuan Zhang , Minquan Li
A novel compact microstrip lowpass filter (LPF) is proposed in this paper, which consists of the complementary rectangle split ring defected microstrip structure (CRSR-DMS), open stubs, spurline and the dumbbell-shaped defected ground structure (DGS). Due to the unique response of the presented CRSR-DMS, a low passband insertion loss and a sharp transition of the proposed LPF was achieved. Meanwhile, an improved stopband was obtained by properly adjusting the working frequencies of open stubs, a third-order LPF using spurline and dumbbell-shaped DGS. The measured result of the designed LPF shows that attenuation rate reaches 159 dB/GHz and a wide stopband is obtained from 4.07 GHz to more than 15 GHz. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6760 
Volume: 13
Issue: 1
Page: 85-90
Publish at: 2015-01-01

Inter-Harmonics in Voltage-Sourced Converters based High Voltage Direct Current Systems

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4171
Phuc Huy Nguyen
Voltage-Sourced Converter (VSC) is the main component in a VSC-based High Voltage Direct Current (HVDC) system. In addition to the characteristic harmonics, the inter-harmonics could be originated from the characteristic of each converter working at different modulation frequencies, or from a distorting frequency on one or both ac (or dc) systems. The space vector representation of VSC’s switching functions is used as a tool for analyzing and giving the understanding how the inter-harmonics appear. Based on the methodological analysis, simulation models were built and implemented using SimPowerSystems in MATLAB for cases. The simulation results show that, a series of inter-harmonics is produced tend to be dominant in low-frequency range, especially the negative-sequence inter-harmonics which have lower frequencies than the fundamental. This elaborate understanding of VSC-based HVDC system’s inter-harmonic characteristic could be beneficial to harmonic measurement and mitigation control. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6809 
Volume: 13
Issue: 1
Page: 10-19
Publish at: 2015-01-01
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