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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Advanced Navigation Technology
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Journal DOI :
The Korea Navigation Institute
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Volume & Issues
Volume 20, Issue 4 - Aug 2016
Volume 20, Issue 3 - Jun 2016
Volume 20, Issue 2 - Apr 2016
Volume 20, Issue 1 - Feb 2016
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Analysis of Runway Occupancy Time Using ADS-B Message about Landing Airplane
Ku, SungKwan ; Baik, Hojong ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 167~174
DOI : 10.12673/jant.2016.20.3.167
Runway and taxiway is base facilities for aircraft take off and landing and runway capacity is one of major factor for airport capacity. Runway occupancy time is affect on the runway capacity. The identification of aircraft using taxiway by analysis of airport ground surveillance data and the measurement of pass time on the points is general method for the confirmation of the runway occupancy time. This study is runway occupancy time analysis of landing airplane using ADS-B message, in this study we surveyed landing aircraft runway occupancy time and analysis of serviced record using taxiway include rapid exit taxiway. The result of analysis is to confirm the different of landing direction and aircraft category on the same runway caused by structure of airport. Also the result of runway occupancy time analyzed data, it is base input data for the air transportation simulation.
A Heave Compensation System for Offshore Crane
Seong, Hyung-seok ; Choi, Hyeong-sik ; Jeong, Seong-hoon ; Lee, Sang-ki ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 175~181
DOI : 10.12673/jant.2016.20.3.175
This paper introduces a heave compensation system for offshore crane when it gets unexpected disturbances and external force. The dynamic model consists of crane assumed to be the rigid body, hydraulic driven winch, elastic rope and payload. To keep the payload from moving up and down, PD control algorithm is applied. By using the control, the oscillating amplitude of the payload is reduced. Also by using the estimated values involved with time-delay, the relative motion of payload in heave direction is dramatically shortened. This paper shows using the control algorithm with estimated value having time-delay 0.1 second is enough to heave compensation system.
Implementation of a Buoy System Based on Multi-Hop Relay Networks for Ocean Observation
Lee, Woon-hyun ; Kwon, Hyuk-Jin ; Kim, Si-moon ; Jeong, SeongHoon ; Kim, Jeongchang ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 182~189
DOI : 10.12673/jant.2016.20.3.182
In this paper, we propose a buoy system based on multi-hop relay networks for ocean observation. The proposed system consists of various sensor modules, a gateway, wireless communication modules, and a remote monitoring site. The sensor modules are integrated with various communication interfaces and connected to the gateway of the proposed buoy system with an unified protocol based on controller area network (CAN)-bus. In order to communicate with the remote monitoring site and extend the coverage, the proposed system uses long-term evolution (LTE) router and XBee mesh network modules. The field test results show that the proposed system can extend the coverage using the proposed multi-hop relay network.
Design of Fuzzy-PID Controller for Turbojet Engine of UAV Using LabVIEW
Shin, Haeng-Cheol ; Jie, Min-Seok ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 190~195
DOI : 10.12673/jant.2016.20.3.190
In this paper, 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 Fuzzy-PID control algorithm. To prevent any surge or a flame out event during the engine acceleration or deceleration, the Fuzzy-PID controller effectively controls the fuel flow input of the control system. Fuzzy-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 LabVIEW to perform computer simulations verified the performance of the proposed controller. Response characteristics pursuant to the gain were analyzed by simulation.
Spike Rejection Method for Improving Altitude Control Performance of Quadrotor UAV Using Ultrasonic Rangefinder
Kim, Sung-Hoon ; Choi, Kyeung-Sik ; Hong, Gyo-Young ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 196~202
DOI : 10.12673/jant.2016.20.3.196
In this paper, a stationary wavelet transform method is proposed for improving the altitude control performance of quadrotor UAV using an ultrasonic rangefinder. A ground tests are conducted using an ultrasonic rangefinder that is much used for vertical takeoff and landing. An ultrasonic rangefinder suffers from signal`s spike due to specular reflectance and acoustic noise. The occurred spikes in short time span need to be analyzed at both sides time and frequency domain. It was known that stationary wavelet transform is the transferring solution to the problem occurred by down sampling from DWT also more efficient to remove noise than DWT. The analyzed spikes of the ultrasonic rangefinder using a stationary wavelet transform and experimental results show that it can effectively remove the spikes of the ultrasonic rangefinder.
An Efficient Information Fusion Method for Air Surveillance Systems
Cho, Taehwan ; Oh, Semyoung ; Lee, Gil-Young ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 203~209
DOI : 10.12673/jant.2016.20.3.203
Among the various fields in the communications, navigation, and surveillance/air traffic management (CNS/ATM) scheme, the surveillance field, which includes an automatic dependent surveillance - broadcast (ADS-B) system and a multilateration (MLAT) system, is implemented using satellite and digital communications technology. These systems provide better performance than radar, but still incur position error. To reduce the error, we propose an efficient information fusion method called the reweighted convex combination method for ADS-B and MLAT systems. The reweighted convex combination method improves aircraft tracking performance compared to the original convex combination method by readjusting the weights given to these systems. In this paper, we prove that the reweighted convex combination method always provides better performance than the original convex combination method. Performance from the fusion of ADS-B and MLAT improves an average of 51.51% when compared to the original data.
Analysis for FOD Automatic Detection System
Kim, Sung-Hoon ; Park, Myoung-Kyu ; Hong, Gyo-Young ; So, Jun-Soo ; Kim, Sang-kwon ; Kim, Uri-Eol ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 210~217
DOI : 10.12673/jant.2016.20.3.210
Damage caused by FOD which is a foreign substance at the movement area in airports around the world has reached 200 million every year. In 2000, the casualties occurred 133 people at charles de gaulle airport due to FOD. The occurrence of damage by FOD has continuously influenced in domestic also it makes equipment repair indirectly or directly. Accordingly, One of the solutions to the problem is the development of FOD automatic detection system. That is ongoing for plane movement area in airport. As the analyzed result, the military airport prefered mobile type and the civil airport prefered fixed type due to the characteristics of the operating type. In this paper, we analyzed the minimum performance specifications meeting the domestic requirements by investigating military and private FOD detection systems.
4 and 7 Element GPS Anti-jamming Algorithm Performance Analysis Considering the Relative Arrangement of the Multiple Jammers
Choi, Jae-Gun ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 218~225
DOI : 10.12673/jant.2016.20.3.218
Null steering and beam steering are known well as anti-jamming methods in GPS anti-jamming system. Null steering gets a noise attenuation effect for the direction of jamming and beam steering earns additional gain synthesis for the direction of satellite signals. According to the research in the article for signal processing, it expresses that the N array antenna is effective for N-1 number of jamming signal by math public interest, however, the two algorithms analysis is not unknown for the operating condition of the realistic vehicle. In this paper, we modeled anti-jamming system using 4 and 7 array antenna and showed the two algorithms performance (PM, LCMV) when considering the number of antenna array, jammers and vehicle position (horizontal, vertical). In result, we showed that the case of vertical position of the vehicle which has large tilt angle for the relative position of satellites and jammers, has about 10 dB gain more in comparison with one of vertical position in spite of same JSR condition.
Type-2 Fuzzy Self-Tuning PID Controller Design and Steering Angle Control for Mobile Robot Turning
Park, Sang-Hyuk ; Choi, Won-Hyuck ; Jie, Min-Seok ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 226~231
DOI : 10.12673/jant.2016.20.3.226
Researching and developing mobile robot are quite important. Autonomous driving of mobile robot is important in various working environment. For its autonomous driving, mobile robot detects obstacles and avoids them. Purpose of this thesis is to analyze kinematics model of the mobile robot and show the efficiency of type-2 fuzzy self-tuning PID controller used for controling steering angle. Type-2 fuzzy is more flexible in verbal expression than type-1 fuzzy because it has multiple values unlike previous one. To compare these two controllers, this paper conduct a simulation by using MATLAB Simulink. The result shows the capability of type-2 fuzzy self-tuning PID is effective.
An Efficient Multi-User Resource Allocation Scheme for Future IEEE 802.11 LRLP Communications
Ahn, Woojin ; Kim, Ronny Yongho ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 232~237
DOI : 10.12673/jant.2016.20.3.232
As a possible standardization of wireless local area network (WLAN), IEEE 802.11 LRLP is under discussion in order to support long range and low power (LRLP) communication for internet of things (IoT) including drones and many other IoT devices. In this paper, an efficient adaptive resource unit allocation scheme for uplink multiuser transmission in IEEE 802.11 LRLP networks is proposed. In the proposed scheme, which adopts OFDMA random access based transmission scheme of IEEE 802.11ax, in order to enhance the efficiency of the slotted OFDMA random access, access point (AP) traces the history of the sizes of successfully transmitted uplink data, and adjusts the sizes of resource units for the next uplink multiuser transmission adaptively. Our simulation results corroborate that the proposed scheme significantly improves the system throughput.
Ontology-based Semantic Matchmaking for Service-oriented Mission Operation
Song, Seheon ; Lee, SangIl ; Park, JaeHyun ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 238~245
DOI : 10.12673/jant.2016.20.3.238
There are technological, operational and environmental constraints at tactical edge, which are disconnected operation, intermittent connectivity, and limited bandwidth (DIL), size, weight and power (SWaP) limitations, ad-hoc and mobile network, and so on. To overcome these limitations and constraints, we use service-oriented architecture (SOA) based technologies. Moreover, the operation environment is highly dynamic: requirements change in response to the emerging situation, and the availability of resources needs to be updated constantly due to the factors such as technical failures. In order to use appropriate resources at the right time according to the mission, it needs to find the best resources. In this context, we identify ontology-based mission service model including mission, task, service, and resource, and develop capability-based matching in tactical edge environment. The goal of this paper is to propose a capability-based semantic matching for dynamic resource allocation. The contributions of this paper are i) military domain ontologies ii) semantic matching using ontology relationship; and (iii) the capability-based matching for the mission service model.
Resonant Type Wireless Power Transfer Using an Optimized Antenna at 1m Distance
Kim, Young Hyun ; Ryu, Daun ; Park, Daekil ; Koo, Kyung Heon ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 246~251
DOI : 10.12673/jant.2016.20.3.246
This paper has optimized WPT (wireless power transfer) antenna, and compared EM (electromagnetic) simulation result with measurement for the magnetic resonant type standard of A4WP (alliance for wireless power) using 6.78MHz frequency and 1m distance. Power transmission distance is affected by various factors such as system shape, antenna size, and resonator coil pitch etc, which were confirmed by the EM simulation. By simulation an optimized WPT antenna was designed for a fixed distance, and the transmission loss
has been calculated with changing distance. Measurement was carried for the fabricated antenna, and the measured transmission loss is 1.5dB with 70% efficiency at maximum 1.3m distance compared to the simulated loss of 1.6dB with 69% efficiency
WLAN OFDMA Random Access Based Communications for In-Aircraft Wireless Sensor Networks
Ahn, Woojin ; Kim, Ronny Yongho ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 252~257
DOI : 10.12673/jant.2016.20.3.252
In this paper a novel access scheme for uplink multiuser transmission based on IEEE 802.11ax random access in in-aircraft wireless sensor networks is proposed. The proposed scheme provides an efficient access control mechanism with three divisions of OFDMA backoff counter (OBO): access, deferring, dropping, which controls the number of potential uplink transmission stations. The proposed scheme can be used efficiently in in-aircraft wireless sensor network where a large number of sensors need to be supported. By using the proposed scheme, since in-aircraft sensors attempt channel access using the proposed differentiated OBO parameters, the number of stations exceeds the access capacity can be efficiently controlled. This paper also provides the mathematical analysis of the proposed scheme, regarding the optimal parameters. According to the performance analysis, the proposed scheme is able to efficiently control the access behavior of wireless sensors in the network.
Compuationally Efficient Propagator Method for DoA with Coprime Array
Byun, Bu-Guen ; Yoo, Do-Sik ;
The Journal of Advanced Navigation Technology, volume 20, issue 3, 2016, Pages 258~264
DOI : 10.12673/jant.2016.20.3.258
In this paper, we propose a computationally efficient direction of arrival (DoA) estimation algorithm based on propagator method with non-uniform array. While the co-prime array techniques can improve the resolution of DoA, they generally lead to high computational complexity as the length of the coarray aperture. To reduce the complexity we use the propagator method that does not require singular value decomposition (SVD). Through simulations, we compare MUSIC with uniform lineary array, propagator method with uniform linear array, MUSIC with co-prime array, and the proposed scheme and observe that the performance of the proposed scheme is significantly better than MUSIC or propagator method with uniform linear array while it is slightly worse than computationally much more expensive co-prime array MUSIC scheme.