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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Advanced Navigation Technology
Journal Basic Information
Journal DOI :
The Korea Navigation Institute
Editor in Chief :
Volume & Issues
Volume 18, Issue 6 - Dec 2014
Volume 18, Issue 5 - Oct 2014
Volume 18, Issue 4 - Aug 2014
Volume 18, Issue 3 - Jun 2014
Volume 18, Issue 2 - Apr 2014
Volume 18, Issue 1 - Feb 2014
Selecting the target year
Turbojet Engine Control of UAV using Artificial Neural Network PID
Kim, Dae-Gi ; Hong, Gyo-Young ; Ahn, Dong-Man ; Hong, Seung-Beom ; Jie, Min-Seok ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 107~113
DOI : 10.12673/jant.2014.18.2.107
In this paper, controller Propose to prevent compressor surge and improve the transient response of the fuel flow control system of turbojet engine. Turbojet engine controller is designed by applying Artificial Neural Network PID control algorithm and make an inference by applying Artificial Neural Network Error Back Propagation Algorithm. To prevent any surge or a flame out event during the engine acceleration or deceleration, the ANN PID controller effectively controls the fuel flow input of the control system. ANN PID results are used as the fuel flow control inputs to prevent compressor surge and flame-out for turbo-jet engine and the controller is designed to converge to the desired speed quickly and safely. Using MATLAB to perform computer simulations verified the performance of the proposed controller. Response characteristics pursuant to the gain were analyzed by simulation.
The Study on the Direction of Developing an Aerodrome Traffic Control Simulator for the Air Traffic Controller
Hong, Seung-Beom ; Kim, DoHyun ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 114~120
DOI : 10.12673/jant.2014.18.2.114
In this paper, we reviews the need and contents of aerodrome control simulator for air traffic controllers' training. In the view of managing the aviation safety, the departure and landing phases of aircraft are very important, because more than 60% of aircraft accidents and incidents have occurred in the take-off and landing phases. According to the benchmark each as practice type, simulation device and fidelity of reality of the air traffic control simulator, we have evaluated the implementation level of the domestic air traffic control simulator and checked up the current simulator's problems through the air traffic controllers' survey. Therefore, we suggest to the direction of developing a HI-FI simulator for aerodrome controllers.
The Efficient Multimedia Data Transmission Using NMEA-0183
Hong, Sung-Hwa ; Yang, Seong-Ryul ; Lee, Seong-Real ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 121~127
DOI : 10.12673/jant.2014.18.2.121
The functionality of BNWAS and its operations are investigated through its international standard. But the BNWAS is being used currently in the ship had difficulty in monitoring. Several kinds of data are generated from many equipments in BNWAS, such as NMEA-0183 data or NMEA-2000. In this paper, we have proposed a method of the multimedia data transmission using a communication protocol based on slower NMEA-0183, which is mainly used in BNWAS. Data compression techniques are needed for smooth streaming services of the multimedia data in the low data rate over the NMEA-0183 interface. Although these data are mainly used for the instruments of ship, their efficient transmission may be needed if they are managed to control the BNWAS equipment with sensors.
The Implementation of BNWAS Based on TLC Using USN
Hong, Sung-Hwa ; Yang, Seong-Ryul ; Lee, Seong-Real ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 128~133
DOI : 10.12673/jant.2014.18.2.128
This paper is the study of BNWAS based on TLC. The functionality of BNWAS and its operations are investigated through its international standard. But the BNWAS to be used currently in the ship have difficulty in monitoring. Several kinds of data are generated from many equipments in BNWAS, such as NMEA-0183 data or NMEA-2000. Although these data are mainly used for the safe navigation of ship, their usability may be enhanced if they are managed to control the BNWAS equipment with sensors. The purpose of this system is prevent the marine accidents on sailing voyages due to drowsiness of watchers. On Night sailing, watcher is collected the navigation information from multiple devices and he determines the safe operation of the ship through continuous monitoring.
Two Feature Points Based Laser Scanner for Mobile Robot Navigation
Kim, Joo-Wan ; Shim, Duk-Sun ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 134~141
DOI : 10.12673/jant.2014.18.2.134
Mobile robots use various sensors for navigation such as wheel encoder, vision sensor, sonar, and laser sensors. Dead reckoning is used with wheel encoder, resulting in the accumulation of positioning errors. For that reason wheel encoder can not be used alone. Too much information of vision sensors leads to an increase in the number of features and complexity of perception scheme. Also Sonar sensor is not suitable for positioning because of its poor accuracy. On the other hand, laser sensor provides accurate distance information relatively. In this paper we propose to extract the angular information from the distance information of laser range finder and use the Kalman filter that match the heading and distance of the laser range finder and those of wheel encoder. For laser scanner with one feature point error may increase much when the feature point is variant or jumping to a new feature point. To solve the problem, we propose to use two feature points and show that the positioning error can be reduced much.
Design and Implementation of Synchronization Unit for AeroMACS System
Jang, Soohyun ; Lee, Eunsang ; Jung, Yunho ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 142~150
DOI : 10.12673/jant.2014.18.2.142
In this paper, the performance analysis results of time/frequency synchronization and cell search algorithm are presented for aeronautical mobile airport communication systems (AeroMACS). AeroMACS is based on IEEE 802.16e mobile WiMAX standard and uses the aeronautical frequency band of 5GHz with the bandwidth of 5MHz. The simulation model of AeroMACS is designed and the performance evaluation is conducted with the various airport channel models such as apron (APR), runway (RWY), taxiway (TWY), and park (PRK). The proposed synchronization unit was designed in hardware description language (HDL) and implemented on FPGA. Also, the real-time operation was verified and evaluated using FPGA test system.
Super-Pixel-Based Segmentation and Classification for UAV Image
Kim, In-Kyu ; Hwang, Seung-Jun ; Na, Jong-Pil ; Park, Seung-Je ; Baek, Joong-Hwan ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 151~157
DOI : 10.12673/jant.2014.18.2.151
Recently UAV(unmanned aerial vehicle) is frequently used not only for military purpose but also for civil purpose. UAV automatically navigates following the coordinates input in advance using GPS information. However it is impossible when GPS cannot be received because of jamming or external interference. In order to solve this problem, we propose a real-time segmentation and classification algorithm for the specific regions from UAV image in this paper. We use the super-pixels algorithm using graph-based image segmentation as a pre-processing stage for the feature extraction. We choose the most ideal model by analyzing various color models and mixture color models. Also, we use support vector machine for classification, which is one of the machine learning algorithms and can use small quantity of training data. 18 color and texture feature vectors are extracted from the UAV image, then 3 classes of regions; river, vinyl house, rice filed are classified in real-time through training and prediction processes.
Compensation Characteristics of Distorted WDM Signals Depending on Distribution Patterns of SMF Length and RDPS
Lee, Seong-Real ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 158~164
DOI : 10.12673/jant.2014.18.2.158
For transmitting the ultra-high speed optical signals with better performance, the techniques to suppress or mitigate the signal distortion due to group velocity dispersion and optical Kerr effects are required. Dispersion management (DM), optical phase conjugation, and the combination of these two are promising techniques to compensate for the signal distortion. However, the fixed length of single mode fiber (SMF) and the fixed residual dispersion per span (RDPS) usually used in these optical links restricts flexible link configuration. The goal of this paper is to investigate the possibility of the flexible configurations of the ultra-high and long-haul optical transmission systems by using the artificial and the random distribution of SMF length and RDPS of each fiber spans consisted of the optical link. It is confirmed that the proposed link configurations should be one of the methods suitable for implementing the flexible optical transmission systems, however which depend on other link parameters, such as the averaged RDPS, and the launch power.
Development of ELCB with Built-in Algorithm for DC Leakage Current Detection
Joo, Nam-Kyu ; Kim, Nam-Ho ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 165~169
DOI : 10.12673/jant.2014.18.2.165
Digital load is increasing suddenly for various reasons, such as easy control and management. Accordingly, a consumption pattern of load is becoming DC. However, the power supply is supplied by AC power. The load power supply substantially needs DC power. AC power has to be converted to DC power. Renewable energy sources like solar, wind, fuel cells are DC power generation, but the transfer needs to through by AC power, thus DC power has to be converted to AC power. Resultantly, a multi-stage conversion loss is constantly increasing. The power distribution system of DC-based is required for effective use of these energy sources. This requires a DC load, as well as is necessary to develop DC ELCB which are able to detect DC leakage current for implementing protection. In this study, it realize detection algorithm about DC leakage current to verify the performance of the sensor and apply it to the ELCB which is based on DC. Therefore, it is expected to protect operating of DC power distribution system.
Hybrid Genetic Operators of Hamming Distance and Fitness for Reducing Premature Convergence
Lee, Hong-Kyu ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 170~177
DOI : 10.12673/jant.2014.18.2.170
Genetic Algorithms are robust search and optimization techniques but have some problems such as premature convergence and convergence to local extremum. As population diversity converges to low value, the search ability decreases and converges to local extremum but population diversity converges to high value, then the search ability increases and converges to global optimum or genetic algorithm may diverge. To guarantee that genetic algorithms converge to the global optima, the genetic operators should be chosen properly. In this paper, we propose the genetic operators with the hybrid function of the average Hamming distance and the fitness value to maintain the diversity of the GA's population for escaping from the premature convergence. Results of simulation studies verified the effects of the mutation operator for maintaining diversity and the other operators for improving convergence properties as well as the feasibility of using proposed genetic operators on convergence properties to avoid premature convergence and convergence to local extremum.
Design of PCA Architecture Based on Quantum-Dot Cellular Automata
Shin, Sang-Ho ; Lee, Gil-Je ; Yoo, Kee-Young ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 178~184
DOI : 10.12673/jant.2014.18.2.178
CMOS technology based on PCA is very efficient at an implementation of memory or ALU. However, there has been a growing interest in quantum-dot cellular automata (QCA) because of the limitation of CMOS scaling. In this paper, we propose a design of PCA architecture based on QCA. In the proposed PCA design, we utilize D flip-flop and XOR logic gate without wire crossing technique, and design a input and rule control switches. In experiment, we perform the simulation of the proposed PCA architecture by QCADesigner. As the result, we confirm the efficiency the proposed architecture.
Analysis of RFID Standard Patent Data for RFID Technology Trends
Rho, Seungmin ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 185~190
DOI : 10.12673/jant.2014.18.2.185
RFID technology as a typical convergence technology combines RFID communication, mobile communication and network infrastructure, and information processing technology. As it enables users to communicate with the surroundings, RFID technology is now recognized to serve as the basis technology for the ubiquitous information society where users can get the needed information anytime and anywhere. Through lots of efforts for the early technology development and standardization activities on RFID technology, Korea has been leading technology standardization as well as technology initiatives. Thus in this paper, we discuss the RFID technology trend by analyzing RFID standard patent data which is declared in international organization for standardization (ISO, IEC, ITU). Especially, we analyzed 906 standard patents data that declared in International organization for standardization (SO, ISO/IEC JTC1, ITU-T) on June 2013.
Integrated Verification of Hadoop Cluster Prototypes and Analysis Software for SMB
Cha, Byung-Rae ; Kim, Nam-Ho ; Lee, Seong-Ho ; Ji, Yoo-Kang ; Kim, Jong-Won ;
The Journal of Advanced Navigation Technology, volume 18, issue 2, 2014, Pages 191~199
DOI : 10.12673/jant.2014.18.2.191
Recently, researches to facilitate utilization by small and medium business (SMB) of cloud computing and big data paradigm, which is the booming adoption of IT area, has been on the increase. As one of these efforts, in this paper, we design and implement the prototype to tentatively build up Hadoop cluster under private cloud infrastructure environments. Prototype implementation are made on each hardware type such as single board, PC, and server and performance is measured. Also, we present the integrated verification results for the data analysis performance of the analysis software system running on top of realized prototypes by employing ASA (American Standard Association) Dataset. For this, we implement the analysis software system using several open sources such as R, Python, D3, and java and perform a test.