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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Electrical Engineering and Technology
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Journal DOI :
The Korean Institute of Electrical Engineers
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Volume & Issues
Volume 8, Issue 6 - Nov 2013
Volume 8, Issue 5 - Sep 2013
Volume 8, Issue 4 - Jul 2013
Volume 8, Issue 3 - May 2013
Volume 8, Issue 2 - Mar 2013
Volume 8, Issue 1 - Jan 2013
Selecting the target year
Stochastic Integrated Generation and Transmission Planning Incorporating Electric Vehicle Deployment
Moon, Guk-Hyun ; Kong, Seong-Bae ; Joo, Sung-Kwan ; Ryu, Heon-Su ; Kim, Tae-Hoon ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 1~10
DOI : 10.5370/JEET.2013.8.1.001
The power industry is currently facing many challenges, due to the new environment created by the introduction of smart grid technologies. In particular, the large-scale deployment of electric vehicles (EVs) may have a significant impact on demand for electricity and, thereby, influence generation and transmission system planning. However, it is difficult to deal with uncertainties in EV charging loads using deterministic planning methods. This paper presents a two-stage stochastic decomposition method with Latin-hyper rectangle sampling (LHRS) to solve the integrated generation and transmission planning problem incorporating EV deployment. The probabilistic distribution of EV charging loads is estimated by Latin-hyper rectangle sampling (LHRS) to enhance the computational performance of the proposed method. Numerical results are presented to show the effectiveness of the proposed method.
Analysis of Magnitude and Rate-of-rise of VFTO in 550 kV GIS using EMTP-RV
Seo, Hun-Chul ; Jang, Won-Hyeok ; Kim, Chul-Hwan ; Chung, Young-Hwan ; Lee, Dong-Su ; Rhee, Sang-Bong ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 11~19
DOI : 10.5370/JEET.2013.8.1.011
Very Fast Transients (VFT) originate mainly from disconnector switching operations in Gas Insulated Substations (GIS). In order to determine the rate-of-rise of Very Fast Transient Overvoltage (VFTO) in a 550 kV GIS, simulations are carried out using EMTP-RV. Each component of the GIS is modeled by distributed line model and lumped model based on equivalent circuits. The various switching conditions according to closing point-on-wave and trapped charge are simulated, and the results are analyzed. Also, the analysis of travelling wave using a lattice diagram is conducted to verify the simulation results.
Implementation of an Intelligent Grid Computing Architecture for Transient Stability Constrained TTC Evaluation
Shi, Libao ; Shen, Li ; Ni, Yixin ; Bazargan, Masound ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 20~30
DOI : 10.5370/JEET.2013.8.1.020
An intelligent grid computing architecture is proposed and developed for transient stability constrained total transfer capability evaluation of future smart grid. In the proposed intelligent grid computing architecture, a model of generalized compute nodes with 'able person should do more work' feature is presented and implemented to make full use of each node. A timeout handling strategy called conditional resource preemption is designed to improve the whole system computing performance further. The architecture can intelligently and effectively integrate heterogeneous distributed computing resources around Intranet/Internet and implement the dynamic load balancing. Furthermore, the robustness of the architecture is analyzed and developed as well. The case studies have been carried out on the IEEE New England 39-bus system and a real-sized Chinese power system, and results demonstrate the practicability and effectiveness of the intelligent grid computing architecture.
Fitness Sharing Particle Swarm Optimization Approach to FACTS Installation for Transmission System Loadability Enhancement
Chang, Ya-Chin ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 31~39
DOI : 10.5370/JEET.2013.8.1.031
Proper installation of Flexible AC Transmission Systems (FACTS) devices in existing transmission networks can enable power systems to accommodate more power transfer with less network expansion cost. The problem to maximize transmission system loadability by determining optimal locations and settings for installations of two types of FACTS devices, namely static var compensator (SVC) and thyristor controlled series compensator (TCSC), is formulated as a mixed discrete-continuous nonlinear optimization problem (MDCP). For solving the MDCP, in the paper, the proposed method with fitness sharing technique involved in the updating process of the particle swarm optimization (PSO) algorithm, can diversify the particles over the search regions as much as possible, making it possible to achieve the optimal solution with a big probability. The modified IEEE-14 bus network and a practical power system are used to validate the proposed method.
A Study on Reliability Differentiated Pricing of Firm Capacity
Kim, Balho H. ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 40~45
DOI : 10.5370/JEET.2013.8.1.040
It is known that Reliability Differentiated Pricing (RDP) can improve the efficiency and benefits of consumers and producers. This paper examines the long-run social welfare maximization problem of the utility and presents a long-term reliability differentiated prices for firm capacity, based on customer outage costs. Then the applicability of the proposed pricing scheme is verified with a case study.
Demand Response Impact on Market Operator's Revenue and Load Profile of a Grid Connected with Wind Power Plants
Tahmasebi, Mehrdad ; Pasupuleti, Jagadeesh ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 46~52
DOI : 10.5370/JEET.2013.8.1.046
Economic properties of an integrated wind power plant (WPP) and the demand response (DR) programs in the sample electricity market are studied. Time of use (TOU) and direct load control (DLC) are two of the DR programs that are applied in the system. The influences of these methods and the incentive payments by market operator's (MOs) with variable elasticity are studied. It is observed that DR with TOU and DLC programs together yields better revenue and energy saving for MOs.
A Study on Multi-objective Optimal Power Flow under Contingency using Differential Evolution
Mahdad, Belkacem ; Srairi, Kamel ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 53~63
DOI : 10.5370/JEET.2013.8.1.053
To guide the decision making of the expert engineer specialized in power system operation and control; the practical OPF solution should take in consideration the critical situation due to severe loading conditions and fault in power system. Differential Evolution (DE) is one of the best Evolutionary Algorithms (EA) to solve real valued optimization problems. This paper presents simple Differential Evolution (DE) Optimization algorithm to solving multi objective optimal power flow (OPF) in the power system with shunt FACTS devices considering voltage deviation, power losses, and power flow branch. The proposed approach is examined and tested on the standard IEEE-30Bus power system test with different objective functions at critical situations. In addition, the non smooth cost function due to the effect of valve point has been considered within the second practical network test (13 generating units). The simulation results are compared with those by the other recent techniques. From the different case studies, it is observed that the results demonstrate the potential of the proposed approach and show clearly its effectiveness to solve practical OPF under contingent operation states.
A Fast Algorithm of the Apparent Factor Calculation for Distance Relay Setting without Fault Analysis
Jo, Yong-Hwan ; Xiang, Ling ; Choi, Myeon-Song ; Park, Ji-Seung ; Lim, Seong-Il ; Kim, Sang-Tae ; Lee, Seung-Jae ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 64~69
DOI : 10.5370/JEET.2013.8.1.064
For power system protection, the distance relay settings are important. Apparent factor is a necessary parameter in distance relay settings. Apparent factors have to be calculated when setting the distance relays and doing the resetting in case of configuration change in power system. The problem is that the current method to calculate apparent factor requires tools and plenty of time to do fault analysis and this method is complex especially in case of configuration change. Therefore this paper proposes a fast algorithm to calculate apparent factor without the fault analysis. Test results prove that this algorithm is simple and accurate by simulation.
A Comparative Study on Frequency Estimation Methods
Kim, Yoon Sang ; Kim, Chul-Hwan ; Ban, Woo-Hyeon ; Park, Chul-Won ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 70~79
DOI : 10.5370/JEET.2013.8.1.070
In this paper, a comparative study on the frequency estimation methods using IRDWT (Improved Recursive Discrete Wavelet Transform), FRDWT(Fast Recursive Discrete Wavelet Transform), and GCDFT(Gain Compensator Discrete Fourier Transform) is presented. The 345[kV] power system modeling data of the Republic of Korea by EMTP-RV is used to evaluate the performance of the proposed two kinds of RDWT(IRDWT and FRDWT) and GCDFT. The simulation results show that the frequency estimation technique based on FRDWT could be the optimal frequency measurement method, and thus can be applied to FDR(Fault Disturbance Recorder) for wide-area blackout protection or frequency measurement apparatus.
An Improved Mean-Variance Optimization for Nonconvex Economic Dispatch Problems
Kim, Min Jeong ; Song, Hyoung-Yong ; Park, Jong-Bae ; Roh, Jae-Hyung ; Lee, Sang Un ; Son, Sung-Yong ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 80~89
DOI : 10.5370/JEET.2013.8.1.080
This paper presents an efficient approach for solving economic dispatch (ED) problems with nonconvex cost functions using a 'Mean-Variance Optimization (MVO)' algorithm with Kuhn-Tucker condition and swap process. The aim of the ED problem, one of the most important activities in power system operation and planning, is to determine the optimal combination of power outputs of all generating units so as to meet the required load demand at minimum operating cost while satisfying system equality and inequality constraints. This paper applies Kuhn-Tucker condition and swap process to a MVO algorithm to improve a global minimum searching capability. The proposed MVO is applied to three different nonconvex ED problems with valve-point effects, prohibited operating zones, transmission network losses, and multi-fuels with valve-point effects. Additionally, it is applied to the large-scale power system of Korea. The results are compared with those of the state-of-the-art methods as well.
Improvements of Performance of Multi-DOF Spherical Motor by Double Air-gap Feature
Lee, Ho-Joon ; Park, Hyun-Jong ; Won, Sung-Hong ; Ryu, Gwang-Hyun ; Lee, Ju ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 90~96
DOI : 10.5370/JEET.2013.8.1.090
As the need of electric motor is increased rapidly throughout our society, the various application fields are created and the service market called robot gets expanded as well as the existing industrial market. Out of those, the joint systems such as humanoid that is servo actuator for position control or all fields which require multi-degree of freedom (multi-DOF) require the development of innovative actuator. It is multi-DOF spherical motor that can replace the existing system in multi-DOF operating system. But, multi-DOF spherical motor that has been researched up to date is at the stage which is insufficient in performance or mechanical practicality yet. Thus, first of all the research results and limitation of the previously-researched guide frame-type spherical motors were analyzed and then the feature of double air-gap spherical motor which was devised to complement that was studied. The double air-gap multi-DOF spherical motor is very suitable spherical motor for system applying which requires the multi-DOF operation due to its simple structure that does not require other guide frame as well as performance improvement due to its special shape which has two air-gaps. So, the validity of the study was verified by designing and producing it with 3D-FEM through the exclusive jig for multi-DOF spherical motor.
Regenerative Current Control Method of Bidirectional DC/DC Converter for EV/HEV Application
Lee, Jung-Hyo ; Jung, Doo-Yong ; Lee, Taek-Kie ; Kim, Young-Ryul ; Won, Chung-Yuen ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 97~105
DOI : 10.5370/JEET.2013.8.1.097
The control method of the bidirectional DC/DC converter for instantaneous regenerative current control is described in this paper. The general method to control the DC/DC converter is the output voltage control. However, the regenerative current cannot be controlled to be constant with this control method. To improve the performance of the conventional control method, the DC-link voltage of the inverter is controlled within the tolerance range by the instantaneous boost and buck operations of the bidirectional DC/DC converter. By the proposed control method, the battery current can be controlled to be constant regardless of the motor speed variation. The improved performance of the DC/DC converter controlled by the proposed control method is verified by the experiment and simulation of the system with the inverter and IPMSM(Interior Permanent Magnet Synchronous Motor) which is operated by the reduced practical speed profile.
Study on Motor Characteristics due to Deviation of the Wheel Diameters with Parallel Operation
Lee, Hyung-Woo ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 106~109
DOI : 10.5370/JEET.2013.8.1.106
It is desirable and advantageous to feed parallel propulsion with induction motors by a single voltage source inverter. However, effects of deviation of the wheel diameters on motor current, rotor speed and torque should be also considered for parallel operation. In order to understand the behavior and characteristics, a simple simulation model is developed by using a commercial Matlab Simulink. From the results, it is clear to manage the diameter deviation of the wheels which are connected to traction motors.
Study on an Adaptive Maximum Torque Per Amp Control Strategy for Induction Motor Drives
Kwon, Chun-Ki ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 110~117
DOI : 10.5370/JEET.2013.8.1.110
Maximum Torque Per Amp (MTPA) control for induction motor drives seeks to achieve a desired torque with the minimum possible stator current. This is favorable in terms of inverter operation and nearly optimal in terms of motor efficiency. However, rotor resistance variation can cause significant performance degradation. This work demonstrates that existing MTPA controls perform sub-optimally as temperature varies. An adaptive MTPA control strategy is proposed that always achieves optimal performance without exhibiting hunting phenomenon regardless of rotor temperature. The proposed control is experimentally shown to accurately achieve the desired torque.
Performance Comparison of the Railway Traction IPM Motors between Concentrated Winding and Distributed Winding
Park, Chan-Bae ; Lee, Byung-Song ; Lee, Hyung-Woo ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 118~123
DOI : 10.5370/JEET.2013.8.1.118
This paper presents performance comparison between concentrated winding and distributed winding of IPMSM (Interior Permanent Magnet Synchronous Motors) which is recently used for light-weight railway applications. Motors are designed on various schemes and analyzed by using FEM (Finite Element Method) instead of EMCNM (Equivalent Magnetic Circuit Network Method) in order to take into account saturation and non-linear magnetic property. The overall performance such as torque, torque ripple, losses, demagnetization, efficiency, power density and so on are investigated in detail at the rated and maximum operating speed. The results of the analysis found that both concentrated and distributed winding IPMSMs are promising candidates for high power railway traction motor.
Simplified Design and Optimization of Slotless Brushless DC Machine for Micro-Satellites Electro-Mechanical Batteries
Abdi, Babak ; Bahrami, Hamid ; Mirtalaei, S.M.M. ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 124~129
DOI : 10.5370/JEET.2013.8.1.124
Electro-Mechanical Batteries have important advantages compared with chemical batteries, especially in Low Earth Orbit satellites applications. High speed, slotless, external rotor, brushless DC machines are proposed and used in these systems as Motor/Generator. A simplified analytic design method is given for this type of machines and, the optimization of machine in order to have maximum efficiency and minimum volume and weight are given in this paper. Particle swarm optimization (PSO) is used as the optimization algorithm and the finite element-based simulations are used to confirm the design and optimization process and show less than 6% error in parametric design.
Experiment and Torque Modeling of Double-Excited, Two-Degree-of-Freedom Motor based on Magnetic Equivalent Circuit Analysis
Kim, Young-Boong ; Lee, Jae-Sung ; Kwon, Byung-Il ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 130~136
DOI : 10.5370/JEET.2013.8.1.130
This paper presents the magnetic equivalent circuit analysis of a double-excited, two-degree-of-freedom (DOF) motor. The double-excited, 2-DOF motor is a laminated structure, making it easy to manufacture and giving it simple operating principles. We explain the structure of the 2-DOF motor and analyze the static characteristics using a magnetic equivalent circuit (MEC) to reduce analysis time. The feasibility of MEC analysis was confirmed by experimental results of the tilting, panning motion. We also confirmed the occurrence of holding torque in every motion.
A Study on Variable Speed Generation System with Energy Saving Function
Dugarjav, Bayasgalan ; Lee, Sang-Ho ; Han, Dong-Hwa ; Lee, Young-Jin ; Choe, Gyu-Ha ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 137~143
DOI : 10.5370/JEET.2013.8.1.137
This paper presents development of variable speed generation (VSG) system with energy saving function. The rubber tyred gantry crane (RTGC) requires the power from diesel-engine. Significant fuel savings by reducing the engine speed can be achieved, because all of operation modes except hoisting are required lower power than rated value of engine. When low speed operation output voltage of generator is decrease until acceptable range of motor driver inverters and auxiliary load supplier. According to power demand engine speed is varying from 20 to 60Hz, and voltage is varying between 210Vac and 480Vac. When idle mode or low power operation dc/dc converter operates by constant output voltage control and inverters dc site voltage is compensated by it. This paper proposed 3-phase interleaved boost converter which has the same structure as the commercially available 3-phase inverter and current sharing capability. 400kW interleaved converter is designed and a performance of converter is evaluated through several experiments with a RTGC system. Energy saving VSG system can cut down fuel consumption by 36% and 21.3% at idle and unidirectional load operations.
The Improved Design of Double Sided Coreless PMLSM with Consideration of Rising Winding Temperature
An, Ho-Jin ; Cho, Gyu-Won ; Jang, Ki-Bong ; Kim, Gyu-Tak ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 144~149
DOI : 10.5370/JEET.2013.8.1.144
This work deals with the optimal design of a coreless PMLSM (Permanent Magnet Linear Synchronous Motor) with consideration of rising winding temperature. The temperature distribution caused by copper loss in the coreless PMLSM was analyzed using a FEM (Finite Element Method). The thrust and current density where the winding temperature reaches the allowable temperature were calculated. The optimal model provides maximum thrust per unit weight.
Analysis of Output Pulse of High Voltage and Nanosecond Blumlein Pulse Generator
Roh, Young-Su ; Jin, Yun-Sik ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 150~155
DOI : 10.5370/JEET.2013.8.1.150
A high voltage and nanosecond Blumlein pulse generator has been developed to produce an output pulse whose voltage level is greater than 250 kV and pulse duration 5 ns. The generator consists of various components such as a charging circuit, a pulse transformer, and a spark gap switch. As a heart of the generator, a Blumlein pulse forming line has been constructed in the cylindrical form using three cylindrical aluminum electrodes that are placed concentrically. Unlike the ideal Blumlein line, the output pulse of an actual Blumlein line may be affected by stray inductances and capacitances of switching and charging components, thereby degrading the performance of the generator. In this paper, PSPICE simulations have been performed to examine effects of stray inductances and capacitances on waveforms of output pulses. Simulation results show that the pulse waveform is significantly distorted mainly by the stray inductance of the spark gap switch.
Winding Temperature Measurement in a 154 kV Transformer Filled with Natural Ester Fluid
Kweon, Dongjin ; Koo, Kyosun ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 156~162
DOI : 10.5370/JEET.2013.8.1.156
This paper measures the hot spot temperatures in a single-phase, 154 kV, 15/20 MVA power transformer filled with natural ester fluid using optical fiber sensors and compares them with those calculated by conventional heat run tests. A total of 14 optical fiber sensors were installed on the high-voltage and low-voltage windings to measure the hot spot temperatures. In addition, three thermocouples were installed in the transformer to measure the temperature distribution during the heat run tests. In the low-voltage winding, the hot spot temperature was
, calculated by the conventional heat run test. However, the hot spot temperature measured using the optical fiber sensor was
between turns 2 and 3 on the upper side of the low-voltage winding. Therefore, the hot spot temperature of the low-voltage winding measured using the optical fiber sensor was
higher than that calculated by the conventional heat run test.
Effects of Annealing Temperature on Properties of Al-Doped ZnO Thin Films prepared by Sol-Gel Dip-Coating
Jun, Min-Chul ; Koh, Jung-Hyuk ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 163~167
DOI : 10.5370/JEET.2013.8.1.163
Aluminum doped zinc oxide (AZO) thin films have been prepared on the glass substrates (Corning 1737) by sol-gel dip-coating method employing zinc acetate and aluminum chloride hexahydrate for the transparent conducting oxide (TCO) applications. 1 at% Al was doped to the ZnO thin films. The effects of post-heating temperature on the crystallization, optical and electrical properties of the AZO films have been investigated. Experimental results showed that post-heating temperature affected the microstructure, electrical resistance, and optical transmittance of the AZO films. From the X-ray diffraction analysis, all films have hexagonal wurtzite crystal structure. Optical transmittance spectra of the AZO films exhibited transmittance higher than about 80% within the visible wavelength region and the optical direct band gap (
) of these films was increased with increasing post-heating temperature. A minimum resistivity of
was observed at
A Compact LTCC Dual-Band WLAN Filter using Two Notch Resonators
Park, Jun-Hwan ; Cheon, Seong-Jong ; Park, Jae-Yeong ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 168~175
DOI : 10.5370/JEET.2013.8.1.168
This paper presents compact dual-band WLAN filter and filter module. They were developed by embedding all of the passive lumped elements into a LTCC substrate. In order to reduce the size/volume of the filter and avoid EM parasitic couplings between the passive elements, the proposed filter was designed using a 3rd order Chebyshev circuit topology and J-inverter transformation technology. The 3rd order Chebyshev bandpass filter was firstly designed for the band-selection of the 802.11b and was then transformed using finite transmission zeros technologies. Finally, the dual-band filter was realized by adding two notch resonators to the 802.11b filter circuit for the band-selection of the 802.11a/g. The maximum insertion losses in the lower and higher passbands were better than 2.0 and 1.3 dB with minimum return losses of 15 and 14 dB, respectively. Furthermore, the filter was integrated with a diplexer to clearly split the signals between 2 and 5 GHz. The maximum insertion and minimum return losses of the fabricated module were 2.2 and 14 dB at 2.4 - 2.5 GHz, and 1.6 and 19 dB at 5.15 - 5.85 GHz, respectively. The overall volume of the fabricated filter was
Classification of Bridge Current and Analysis of Heat Transfer Characteristics in Polyvinyl-Chloride-Sheathed Flat Cord Under Tracking
Jee, Seung-Wook ; Lee, Chun-Ha ; Lee, Kwang-Sik ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 176~182
DOI : 10.5370/JEET.2013.8.1.176
In this study, we examine the tracking happen in a polyvinyl-chloride-sheathed flat cord (PVCSFC), which is widely used as a distribution cord. The study classifies the bridge current via the formed conductive paths during tracking in the PVCSFC. Further, it attempts to distinguish the characteristics of heat generation and heat transfer by kind of bridge current. When the PVCSFC is in the static state, the bridge currents flow only through the electrolyte bridge. In the case of the carbonized PVCSFC, the bridge currents flow through one or more conductive paths. One is the electrolyte bridge, the other is the bridge that is consisted electrolyte and carbonized insulation. Currents flowing through different conductive paths have different heat generation and transfer characteristics. As the bridge current flowing in the conductive path consisting of electrolyte and carbonized insulation increases, the temperature difference between the surface of the PVCSFC and ambient air also increases correspondingly.
A Capacity Modeling of Bluetooth Access Points for Location Based Service with Mobile Phone and Bluetooth
Kim, In-Hwan ; Shin, Soo Young ; Song, Young-Ho ; Chung, Ki-Dong ; Jeong, Gu-Min ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 183~189
DOI : 10.5370/JEET.2013.8.1.183
In this paper, we propose a capacity modeling method for Bluetooth based LBSs (Location Based Services) between Bluetooth APs(Access Points) and mobile phones. In order to do this, we consider the entrance and exit of the users to and from the AP. Using parameters such as the connection time, data transmission time and number of users in the AP zone, we analyze the capacity of a Bluetooth AP using an appropriate queuing model. The required number of APs in a certain zone is estimated from the number of users in the zone using the proposed queuing model. By performing simulations and experiments, the validity and applicability of the proposed method are verified.
A Hybrid Guidance Law for a Strapdown Seeker to Maintain Lock-on Conditions against High Speed Targets
Lee, Chae Heun ; Hyun, Chul ; Lee, Jang Gyu ; Choi, Jin Yung ; Sung, Sangkyung ;
Journal of Electrical Engineering and Technology, volume 8, issue 1, 2013, Pages 190~196
DOI : 10.5370/JEET.2013.8.1.190
This paper proposes a new guidance law, which considers the Field of View (FOV) of the seeker when a missile has a strapdown seeker mounted instead of a gimbal seeker. When a strapdown seeker, which has a narrow FOV, is used for tracking a target, the FOV of the seeker is an important consideration for guidance performance metrics such as miss distance. We propose a new guidance law called hybrid guidance (HG) to address the shortcomings of conventional guidance laws such as proportional navigation guidance (PNG), which cannot maintain lock-on conditions against high speed targets due to the narrow FOV of the strapdown seeker. The aim of the HG law is to null miss distance and to maintain the look angle within the FOV of the strapdown seeker. In order to achieve this goal, we combine two guidance laws in the HG law. One is a PNG law to null the LOS rate, and the other is a sliding mode guidance (SMG) law derived to keep the look angle within the FOV by employing a Lyapunov-like function with a sliding mode control methodology. We also propose a method to switch these two guidance laws at certain look angles for better guidance performance.