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25,002 Article Results

Influence of Fuel Injection on Gasoline Engine Performance

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2207
Zong-zheng Ma , Xin-li Wang
Because of the most common method of preparing the fuel-air mixture for gasoline-fueled engines is port fuel injection (PFI). For reducing the wall-film entering the cylinder in liquid phase, the phenomena of wall-film entering the cylinder in liquid phase should be at minimum lever or be avoided. So the first thing for learning the wall-film is to detect the way of the wall-film entering the cylinder. Therefore, the way of the wall-film enter the cylinder in liquid phase is detected by changing the temperature of the wall-film location and time for wall-film evaporated. Then the way is validated by experiment test bed and it is improved that the way is feasible. At the end the influence of injection timing and fuel ratio on engine performance is studied based on the test bed.The results show that regardless of the expansion stroke or the intake stroke fuel injection the injection timing delay will decrese the engine power and  make emission deterioration meanwhile the twice fuel injection can improve the fuel film evaporation resulting of high-speed airflow of intake charge. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2398
Volume: 11
Issue: 4
Page: 2141-2147
Publish at: 2012-04-01

Transient Stability Enhancement of Power System Using TCSC

https://ijece.iaescore.com/index.php/IJECE/article/view/5323
Pasuparti Sunil Kumar
This project presents the variable effective fundamental equivalent reactance capability of TCSC for enhancing the transient stability of power systems. For obtaining the varying effective fundamental equivalent reactance, two different controllers namely a speed deviation based Self-tuning Fuzzy PID Controller and a nonlinear controller are used. To validate the performance of the control schemes, the simulation studies are carried out on a single machine infinite bus system using MATLAB/ SIMULINK software package. The results of computer simulation indicate that Self-tuning Fuzzy PID controlled TCSC can not only improve the static stability of system, but also effectively damp power oscillation and enhance the transient stability of system when the power system suffers small disturbance and short circuit. In addition, it also illuminates that Self-tuning Fuzzy PID Controlled TCSC is more effective than nonlinear control, traditional PID control and fixed series compensation.DOI:http://dx.doi.org/10.11591/ijece.v2i3.245
Volume: 2
Issue: 3
Page: 317-324
Publish at: 2012-03-15

A 5.9 GHz Low Power and Wide Tuning Range CMOS Current-controlled Ring Oscillator

https://ijece.iaescore.com/index.php/IJECE/article/view/5317
Prapto Nugroho , Ramesh K. Pokharel , Haruichi Kanaya , Keiji Yoshida
Designing low power, low noise, wide tuning range and small size circuit in one single chip is very challenging. This paper describe a low power, wide tuning range three-stage current-controlled ring oscillator (CCO) designed on 0.18um CMOS technology. The CCO circuit has tuning range from 251 MHz to 5.5 GHz or 183% wide. It consumes only 144 uA to 9.76mA by using 1.8V power supply. Phase noise is -104 dBc /Hz at 5.5 GHz and 4 Mhz offset frequency.  Calculated FoM is -154.4 dBc /Hz which is the best among published counterpart papers. The size of the core oscillator circuits without bonding pads is only 0.0003 mm2.DOI:http://dx.doi.org/10.11591/ijece.v2i3.229
Volume: 2
Issue: 3
Page: 293-300
Publish at: 2012-03-15

Modal Coupling Coefficients and Frequency/Bias Planes for Gyromagnetic Boundary Value Problems

https://ijece.iaescore.com/index.php/IJECE/article/view/5322
Junaid Zafar , Tasneem Zafar , Haroon Zafar
In this paper, electromagnetic and uniform precession magnetostatic mode interaction theory is reformulated to include comprehensive electromagnetic modal impact in the determination of modal coupling calculations. For this purpose orthogonal electromagnetic and normal magnetostatic modes character is solved with coupled field Maxwell’s equations and vectorized magnetization expression to model the interactions between electromagnetic modes and magnetostatic uniform precession mode. Calculations for modal coupling factors are presented here for the first time and frequency/ bias planes are constructed using the developed modal interaction formulation with an ameliorated accuracy. The proposed formulation is validated and tested against closed form frequency/ bias solutions concerning these gyromagnetic boundary value problems.DOI:http://dx.doi.org/10.11591/ijece.v2i5.222
Volume: 2
Issue: 5
Page: 609-614
Publish at: 2012-03-15

Study of Wind Turbine based SEIG under Balanced/Unbalanced Loads and Excitation

https://ijece.iaescore.com/index.php/IJECE/article/view/5333
Ashwani Kumar Sharma , A. Kumar , K. S. Sandhu
This paper presents the performance of a stand-alone self-excited induction generator (SEIG) driven by fixed pitch wind turbine. The main objective of the paper is: (i) dynamic study of SEIG under balanced R-L/R-C loads (ii) dynamic study of SEIG under balanced and unbalanced excitation, (iii) Fixed pitch wind turbine model has been considered for driving induction generator. An approach based on dynamic equations of an isolated SEIG under balanced/unbalanced conditions of loads is employed to study the behaviour of the system. The SEIG model with balanced/un-balanced load and excitation has been simulated using MATLAB/SIMULINK.DOI:http://dx.doi.org/10.11591/ijece.v2i3.303
Volume: 2
Issue: 3
Page: 353-370
Publish at: 2012-03-15

An Efficient Adaptive Noise Cancellation Scheme Using ALE and NLMS Filters

https://ijece.iaescore.com/index.php/IJECE/article/view/5325
Jafar Ramadhan Mohammed , Muhammad Safder Shafi , Sahar Imtiaz , Rafay Iqbal Ansari , Mansoor Khan
The basic theme of our paper is to implement a new idea of noise reduction in the real time applications using the concepts of adaptive filters.  Our model which is presented as one of the solutions is based on two stages of operation with the first stage based on the ALE (Adaptive Line Enhancer) filters and the second stage on NLMS (Normalized Least Mean Square) filter. The first stage reduces the sinusoidal noise from the input signal and the second stage reduces the wideband noise. Two input sources of voice are used; one for the normal speech and the other for the noise input, using separate microphones for both signals. The first signal is of the corrupted speech signal and the second signal is of only the noise containing both wideband and narrowband noise. In the first stage the narrowband noise is reduced by using the ALE technique. The second stage gets a signal with ideally only the wideband noise which is reduced using the NLMS technique.  In both the stages the concerned algorithms are used to update the filter coefficients in such a way that the noise is cancelled out from the signal and a clean speech signal is heard at the output.DOI:http://dx.doi.org/10.11591/ijece.v2i3.246
Volume: 2
Issue: 3
Page: 325-332
Publish at: 2012-03-15

An Intelligent Online Vehicle Tyre Pressure Monitoring System

https://ijece.iaescore.com/index.php/IJECE/article/view/5319
Santhosh krishna venkata , Pankaj Kumar Bhowmik
This paper aims at designing an intelligent online tyre pressure monitoring system (TPMS). The objective of this work is to display the tyre pressure of the tyre and also give the indication about the quality. The data corresponding to the tyre pressure is obtained with a high precision MEMS pressure sensor. The output of the MEMS pressure sensor is amplified and transmitted to the processing unit placed on the dash of the vehicle using wireless communication (RF). The processing is carried on using fuzzy logic algorithms on LabVIEW platform. The output pressure is displayed along with the indicator representing the quality. Indicator is green when the tyre pressure is in the desired range specified by the manufacturer. Yellow when the pressure has dropped and need to be inflated. Red indicates tyre pressure is below the safety driving conditions. After testing and validating the entire system using LabVIEW. The entire code is converted to verilog code and dumped on to FPGA chip (Spartan 3E) using FPGA module of LabVIEW with CompactRIO, for implementation of FPGA chip on real time system.DOI:http://dx.doi.org/10.11591/ijece.v2i3.239
Volume: 2
Issue: 3
Page: 301-308
Publish at: 2012-03-15

A Novel Approach For Face Recognition Using Fusion Of Local Gabor Patterns

https://ijece.iaescore.com/index.php/IJECE/article/view/5330
Santosh Nagnath Randive , Anil Balaji Gonde
For face recognition, Gabor features are effectively used. But, only a few approaches used Gabor phase features and they are performing worse than the Gabor magnitude features. To determine the potential of Gabor phase and its fusion with magnitude for face recognition, in this paper, we have proposed local Gabor XOR pattern (LGXP) operator, which encode Gabor phase. Then we introduce block-based Fisher’s linear discriminant (BFLD) for reduce dimensionality of proposed operator and at same time discriminative power also get enhanced. At last, by using BFLD we fuse Gabor phase and Gabor magnitude for face recognition. We evaluate our method for FERET database. Also, we perform comparative experimental studies of different local patterns.DOI:http://dx.doi.org/10.11591/ijece.v2i3.279 
Volume: 2
Issue: 3
Page: 345-352
Publish at: 2012-03-15

Simulation and Implementation of a High Performance Torque Control Scheme of IM Utilizing FPGA

https://ijece.iaescore.com/index.php/IJECE/article/view/5313
R. Rajendran , N. Devarajan
Thi paper presents a novel approach to design and implementation of a high perfromane torque control scheme i.e. direct torque control with space vector modulation(DTC-SVM) of three phase induction motor using Field Programmable gate array (FPGA). The conventional direct torque control (DTC) is one of control scheme that is used commonly in induction motor control system. This method supports a very quick and precise torque response. However, the conventional DTC is not perfect and has some disadvantages. To minimize the ripples of the electromagnetic torque and flux linkage and to fix the variable switching frequency produced in the conventional DTC, this paper proposes improved DTC-SVM concept. Both simulation and experimental results show that the proposed scheme can dramatically improve the steady state performance while preserving the dynamic performance of the conventional DTC.DOI:http://dx.doi.org/10.11591/ijece.v2i3.208
Volume: 2
Issue: 3
Page: 277-284
Publish at: 2012-03-15

A High Efficient High Input Power Factor Interleaved Boost Converter

https://ijece.iaescore.com/index.php/IJECE/article/view/5329
Jayakumar M S , Ajeesh G
In this paper an improved ZVT interleaved boost PFC topology is introduced. The proposed ZVT interleaved boost converter is composed of two cell boost conversion units and an active auxiliary circuit. The proposed converter has two important advantages over the similar soft switching converters. The first one is that parallel to the main switches of the converter the auxiliary switch also operates under soft switching condition. Providing soft switching conditions for interleaved boost converters with more than one cells using only one auxiliary switch is another advantage of this topology. The prototype for the proposed converter was developed with an input of 110V-220V ac power supply feeding a resistive output load of 600 watts. In addition, the proposed converter has the advantages of fewer structure complications, lower cost and ease of control.DOI:http://dx.doi.org/10.11591/ijece.v2i3.254
Volume: 2
Issue: 3
Page: 339-344
Publish at: 2012-03-15

A Comparative Performance Analysis of Torque Control Schemes for Induction Motor Drives

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4896
R Rajendran , Dr. N.Devarajan
This paper presents a comparative study of field-oriented control(FOC), conventional direct torque control(DTC) and proposed space vector modulated direct torque control with low pass filter(SVM-DTC). The main characteristics of FOC, DTC and proposed SVM-DTC schemes are studied by simulation, emphasizing their advantages and disadvantages. The performance of three control schemes is evaluated in terms of torque, current ripples and transient responses. It is shown that the proposed scheme improves the performance by combining a low torque, current ripple characteristics with fast torque dynamics.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.207
Volume: 2
Issue: 2
Page: 177-191
Publish at: 2012-03-14

Three Phase Two Leg Neutral Point Clamped Converter with output DC Voltage Regulation and Input Power Factor Correction

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4892
Bogimi Sirisha , P. Satish Kumar , N. Susheela
In this paper, a three-phase two leg neutral point clamped (NPC) converter is presented for power factor correction and dc-link voltage regulation. The adopted converter has simpler circuit configuration and less number of power switches compared to three-level PWM converter. In this circuit configuration, only eight power switches and four clamping diodes with voltage stress of half the dc bus voltage are used. A simplified space vector pulse width modulation scheme (SVPWM) is also adopted to track the line current commands. A reference voltage vector is generated on the ac terminal for drawing the sinusoidal line currents with unity power factor. This algorithm reduces the time required to calculate the switching time durations of voltage vectors. The simulation results have been presented to verify the validity and effectiveness of the proposed control strategy.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.226
Volume: 2
Issue: 2
Page: 138-150
Publish at: 2012-03-14

DSP Based Vector Control of Five-Phase Induction Using Fuzzy Logic Control

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4897
Zakaria Mohamed Salem
This paper proposes an indirect field oriented controller for five-phase induction motor drives. The controller is based on fuzzy logic control technique. Simulation is carried out by using the Matlab/Simulink package. A complete control system experimentally implemented using digital signal processing (DSP) board. The performance of the proposed system is investigated at different operating conditions. The proposed controller is robust and suitable to high performance five-phase induction motor drives. Simulation and experimental results validate the proposed approaches.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.217
Volume: 2
Issue: 2
Page: 192-202
Publish at: 2012-03-14

A Multilevel Quasi Matrix Converter Design for SRM Drives In EV Applications

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4895
Syeda Fatima Ghousia
This paper presents a novel idea of developing an absolute, general choice multilevel asymmetric power converter for switched reluctance motor (SRM) drive suitable specifically in electric vehicle applications. For SRM drives, the suitability of a particular inverter circuit changes with the motor geometry. It is in contrast to the drives operating with sinusoidal voltages and currents where the inverter topology is independent of the motor design. Specifically, in the case of SRM, the number of the stator/rotor poles and the related issues of the dwell angle and current overlap parameters affect the inverter choice. The multilevel power converters open up a great deal of possibilities in control and can be used to achieve flexible current profiling but with the added benefit of lower switching frequencies and hence less converter losses. The idea is to use a matrix converter topology for finer control on flexible current profiling with three terminals of dc voltage source at the input. To illustrate the potential benefits of this converter, with SRM for EV applications, a Simulink model of proposed multilevel matrix converter was tested in interface with finite element model of the SRM.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.224
Volume: 2
Issue: 2
Page: 170-176
Publish at: 2012-03-14

Adaptive Recurrent Network Network Uncertainty Observer Based Integral Backstepping Control for a PMSM Drive System

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4891
Chih-Hong Lin , Ren-Cheng Wu
The permanent magnet synchronous motor (PMSM) is suitable for high-performance servo applications and has been used widely for the industrial robots, computer-numerically-controlled (CNC) machine tools and elevators. The control performance of the actual PMSM drive system depends on many parameters, such as parameter variations, external load disturbance, and friction force. Their relationships are complex and the actual PMSM drive system has the properties of nonlinear uncertainty and time-varying characteristics. It is difficult to establish an accurate model for the nonlinear uncertainty and time-varying characteristics of the actual PMSM drive system Therefore, an adaptive recurrent neural network uncertainty observer (ARNNUO) based integral backstepping control system is developed to overcome this problem in this paper. The proposed control strategy is based on integral backstepping control combined with RNN uncertainty observer to estimate the required lumped uncertainty. An adaptive rule of the RNN uncertainty observer is employed to on-line adjust the weights of sigmoidal functions by using the gradient descent method and the backpropagation algorithm in according to Lyapunov function. This ARNNUO has the on-line learning ability to respond to the system’s nonlinear and time-varying behaviors. Experimental results are executed to show the control performance of the proposed control scheme.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.260
Volume: 2
Issue: 2
Page: 127-137
Publish at: 2012-03-14
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