Efficient Methods of Tactical Situation Display for Tactical Analysis Tool of P-3C Maritime Patrol Aircraft
김병국 Byoung-kug Kim , 차용훈 Yonghoon Cha , 홍성화 Sung-hwa Hong , 이재호 Jaeho Lee
27(5) 495-501, 2023
김병국 Byoung-kug Kim , 차용훈 Yonghoon Cha , 홍성화 Sung-hwa Hong , 이재호 Jaeho Lee
DOI: JANT Vol.27(No.5) 495-501, 2023
P-3C/K aircraft for maritime patrols that Republic of Korea Navy is using, is equipped with a variety of sensors and communication devices. Collected data from the aircraft is managed as tactical information by flight operators and stored. When the flight mission is completed, this information is transferred to tactical support center on the ground and played back or used for follow-up work through a analysis tool. During a flight mission, there are tens of thousands of detection objects within an hour in KADIZ (Korea air defense identification zone). In contrast, in TSD (tactical situation display), which displays a map when using the analysis tool, all detected objects are expressed as symbols. The increase in display symbols has a significant impact on the TSD image updating and consequently interferes with the smooth operation of operators. In this paper, we propose applying multiple threads and multiple layers to improve the performance of existing TSD. And the performance improvement is proven through the execution results.
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Orbit Design to Optimize Revisit Performance of Low Earth Orbit Satellite Constellation
이성섭 Soung-sub Lee , 김종필 Jong-pil Kim , 유응노 Eung-noh You , 윤재혁 Jae-hyuk Youn , 신호현 Ho-hyun Shin
27(5) 502-509, 2023
이성섭 Soung-sub Lee , 김종필 Jong-pil Kim , 유응노 Eung-noh You , 윤재혁 Jae-hyuk Youn , 신호현 Ho-hyun Shin
DOI: JANT Vol.27(No.5) 502-509, 2023
This study presents a satellite constellation method that achieves optimal revisit performance by utilizing genetic algorithm techniques. The Walker method is a global coverage concept, and there are limitations to target-centered constellation considering the strategic environment of the Korean Peninsula. To overcome these limitations, targets are set in major areas of interest in North Korea, orbit elements with optimal revisit performance for each target are searched, and based on this, the number of satellites optimized for each target is derived using a genetic algorithm. The results of this study demonstrate the performance of the optimized constellation by applying phasing rules to achieve the desired revisit performance.
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Development of MATLAB GUI-based Software for Performance Analysis of RNSS Navigation Message and WAD-RNSS Correction
박재욱 Jaeuk Park , 김부겸 Bu-gyeom Kim , 기창돈 Changdon Kee , 김동욱 Donguk Kim
27(5) 510-518, 2023
박재욱 Jaeuk Park , 김부겸 Bu-gyeom Kim , 기창돈 Changdon Kee , 김동욱 Donguk Kim
DOI: JANT Vol.27(No.5) 510-518, 2023
This paper introduces a MATLAB graphical user interface (GUI) based software for performance analysis of navigation message and wide area differential correction of regional navigation satellite system (RNSS). This software was developed to analyze satellite orbit/clock-related performance of navigation message and wide area differential correction simulating RNSS for regions near Korea based on different distributions of monitor and reference stations. As a result of software operation, navigation message and wide area differential correction are given as output in MATLAB file format. From the analysis of output, it was confirmed that valid navigation message and wide area differential correction could be generated from the results about statistical feature of orbit and clock prediction errors, cm-level fitting errors for navigation message parameters, and 81.9% enhancement in range error for wide area differential correction.
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Air-based Launch Trends and Development of Upward-maneuver Air-Launch Technology
이유진 Yu-jin Lee , 정재원 Jae-won Jung , 임진식 Jin-shik Lim , 김길훈 Kil-hun Kim
27(5) 519-527, 2023
이유진 Yu-jin Lee , 정재원 Jae-won Jung , 임진식 Jin-shik Lim , 김길훈 Kil-hun Kim
DOI: JANT Vol.27(No.5) 519-527, 2023
Air-launch means launching from aircraft such as fighter jets, and has various advantages, such as cost reduction and less environmental/weather impact during launch. However, there are no air-launch satellite in Korea. Examining air-based launch satellite and anti-satellite missiles operated and developed by foreign private companies and various countries confirmed the necessity of domestic research and development. In South Korea, various research activities, including satellite launch system design and development approaches for different launch platforms, have been carried out mainly by academia. Development of upward maneuver air launch technology which is launched in the air when the aircraft is moving upward is suggested. Additionally, an introduction to wind tunnel tests for safety separation verification is provided. A new concept for a test facility has been suggested to conduct drop tests.
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Development of Airline EBT Program Model
최지헌 Jihun Choi , 김성엽 Sung-yeob Kim , 김현덕 Hyeon-deok Kim
27(5) 528-533, 2023
최지헌 Jihun Choi , 김성엽 Sung-yeob Kim , 김현덕 Hyeon-deok Kim
DOI: JANT Vol.27(No.5) 528-533, 2023
Airlines tried to introduce training programs in connection with practical work in order to provide more effective education and training. To this end, airlines have been conducting evidence-based training(EBT) to strengthen the practical capabilities of aviation personnel and enhance safety culture. Airlines can systematically evaluate the capabilities and practical capabilities of aviation personnel by analyzing operational data and case studies for effective EBT model development. In addition, EBT models can be constructed by applying technical methods such as crew resource management (CRM) and a holistic approach that includes human factors. Due to the introduction of EBT, airlines will establish diagnostic and feedback systems for pilots' practical work, provide personalized education, and establish an education and training system that verifies the effectiveness of education through educational outcomes.
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A Study on the Revision of Domestic Pilot Jet Type Rating
김성엽 Sung-yeob Kim , 최지헌 Jihun Choi , 이명식 Myeong-sik Lee , 김현덕 Hyeon-deok Kim
27(5) 534-539, 2023
김성엽 Sung-yeob Kim , 최지헌 Jihun Choi , 이명식 Myeong-sik Lee , 김현덕 Hyeon-deok Kim
DOI: JANT Vol.27(No.5) 534-539, 2023
Currently, in Korea, to obtain a jet type rating, you must receive training on a small business jet model. The reason is because of the law in the Aviation Safety Act Enforcement Rules 『Appendix 4』 that states, “You must receive at least 2 hours of flight training.” In the end, it is acquiring type rating as a small business jet aircraft with relatively low operating costs. The qualifications acquired in this way are different from those for aircraft operated by airlines. However, if you have an initial jet type rating, you can acquire an airline aircraft qualification just by training on a simulator, so airlines want you to have at least a small-jet type rating. However, in the United States and Australia, there is a system in place to acquire initial jet type rating through simulator training without actual flight training.
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Resource Allocation for Performance Optimization of Interleaved Mode in Airborne AESA Radar
김용민 Yong-min Kim , 노지은 Ji-eun Roh , 원진주 Jin-ju Won
27(5) 540-545, 2023
김용민 Yong-min Kim , 노지은 Ji-eun Roh , 원진주 Jin-ju Won
DOI: JANT Vol.27(No.5) 540-545, 2023
AESA radar is able to instantaneously and adaptively position and control the beam, and this enables to have interleaved mode in modern airborne AESA radar which can maximize situational awareness capability. Interleaved mode provides two or more modes simultaneously, such as Air to Air mode and Sea Surface mode by time sharing technique. In this interleaved mode, performance degradation is inevitable, compared with single mode operation, and effective resource allocation is the key component for the success of interleaved mode. In this paper, we identified performance evaluation items for each mode to analyze interleaved mode performance and proposed effective resource allocation methodology to achieve graceful performance degradation of each mode, focusing on detection range. We also proposed beam scheduling techniques for interleaved mode.
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Development of Radar Beam Steering Measurement System and measurement Boresight Error
곽용길 Yong-kil Kwak
27(5) 546-551, 2023
곽용길 Yong-kil Kwak
DOI: JANT Vol.27(No.5) 546-551, 2023
In this study, a beam steering measurement system was developed to perform functions such as far-field beam steering and near -field beam focusing for TX/RX modes in the near file of the AESA radar. The beam steering measurement system consists of a spherical near-field scanner, an antenna positioner, a near-field controller, a network analyzer, a radar control system, a verification radar, a simulated radio, and an AESA radar. Using the developed system, the characteristics of TX/RX patterns before and after installation of radome to AESA radar were measured, and the beam pattern was analyzed through conversion to far field-after near-field measurement. The boresight error of the radar antenna device was measured, and it was confirmed that the main lobes were formed the same before and after the simulated radar dome was mounted.
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Classifying Midair Collision Risk in Airspace Using ADS-B and Mode-S Open-source Data
김종부 Jongboo Kim , 이두열 Dooyoul Lee
27(5) 552-560, 2023
김종부 Jongboo Kim , 이두열 Dooyoul Lee
DOI: JANT Vol.27(No.5) 552-560, 2023
Aircraft midair collisions are dangerous events that can cause massive casualties. To prevent this, civil aviation has mandated the installation of TCAS (ACAS), which is becoming more sophisticated with the help of new technologies. However, there are institutional problems in collecting data for TCAS research in Korea, limiting the ability to obtain data for personal research. ADS-B and Mode-S automatic broadcast various information about the flight status of the aircraft. This data also contains information about TCAS RA, which can be used by anyone to find examples of TCAS RA operation. We used the databases of ADS-B Exchange and Opensky-Network to acquire data and visually represent three TCAS RA cases through Python coding. We also identified domestic TCAS cases in the first half of 2023 and analyzed their characteristics to confirm the usefulness of the data.
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UAM Parallel Corridor Collision Risk Analysis based on Collision Risk Model
김연실 Youn-sil Kim , 배중원 Joong-won Bae
27(5) 561-567, 2023
김연실 Youn-sil Kim , 배중원 Joong-won Bae
DOI: JANT Vol.27(No.5) 561-567, 2023
In this study, the collision risk of the UAM (Urban Air Mobility) corridor was analyzed using a collision risk model applied to the manned aircraft corridor. According to the K-UAM roadmap and operating concept, UAM is expected to fly on a designated route similar to existing manned aircraft operations and operate on two routes, traveling back and forth between the departure point and the destination point. Among domestic manned aircraft routes, the manned aircraft operation between Gimpo Airport and Jeju Airport is similar to this and takes the form of a parallel route with a lateral separation distance between the two routes. In this study, we analyzed the collision risk of the UAM corridor according to the lateral separation distance using a collision risk model used to analyze the collision risk of manned aircraft parallel routes for a similar type of UAM corridor. Based on this, we finally analyzed how many parallel routes could be installed within the width of the Han River, considering the K-UAM demonstration route.
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A Study of Range Resolving Performance for Airborne Radar Based on Signal Processing and Tracking Algorithm
박연희 Yeonhee Pak , 김용민 Yong-min Kim
27(5) 588-593, 2023
박연희 Yeonhee Pak , 김용민 Yong-min Kim
DOI: JANT Vol.27(No.5) 588-593, 2023
Range resolution is the ability to distinguish different targets placed in same angular direction but at different distances from the radar. Normally, Range resolution requirement is defined as the width of transmitting pulse. The width of transmitting pulse does not mean the ability to distinguish two different targets. Range resolution performance to detect and track targets separately depends on the signal processing and tracking algorithm not only the width of transmitting pulse. This paper analyzes the processing steps in algorithms to affect the range resolution performance and verifies the results by roof-lab ground test using beacon signal. As a result, to track targets with the same angular position separately, it is desirable to have larger range difference than plot-track association test gate.
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Development of Radar HILS System and Verification Radar Performance Scenario-based
곽용길 Yong-kil Kwak
27(5) 574-579, 2023
곽용길 Yong-kil Kwak
DOI: JANT Vol.27(No.5) 574-579, 2023
The radar flight test has many restrictions on simulating various targets, clutter and jamming signal. Therefore, in this study, a radar HILS system that performs a radar operation simulation function according to an operation scenario was developed. Radar HILS simulates the radar mission environment through radar beam operation simulation, radar operation control, simulated signal generation, and flight attitude simulation.. HILS generates and modulates simulated target signals(single, multiple targets) containing radar mission environments(clutter, jamming etc.) based on flight scenarios, and transmits them to AESA radar over RF. And Scenario-based radar performance was verified by detecting simulated targets and confirming detection results.
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Multiple Target Management of Air-to-Air mode on Airborne AESA Radar
김용민 Yong-min Kim , 노지은 Ji-eun Roh
27(5) 580-586, 2023
김용민 Yong-min Kim , 노지은 Ji-eun Roh
DOI: JANT Vol.27(No.5) 580-586, 2023
AESA radar is able to instantaneously and adaptively position and control the beam, and this enables to greatly improve multi-target tracking capability with high accuracy in comparison to traditional mechanically-scanned radar system. This paper is primarily concerned with the development of an efficient methodology for multi-target managenent with the context of multi-target environment employing AESA radar. In this paper, targets are stratified into two principal categories: currently displayed targets and non-display targets, predicated upon their relative priority. Displayed targets are subsequently stratified into TOI (target of interest), HPT (high priority target), and SAT (situational awareness target), based on the requisite levels of tracking accuracy. It also suggests rules for determining target priority management, especially in air-to-air mode including interleaved mode. This proposed approach was tested and validated in a SIL (system integration lab) environment, applying it to AESA radars mounted on aircraft.
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Systematic Design Approach Based on Cavity-Mode Resonance Analysis for Radiated Susceptibility of Cables in Air Vehicles
강민성 Minseong Kang , 김양원 Yangwon Kim , 노동규 Donggyu Roh , 김명회 Myunghoi Kim
27(5) 587-593, 2023
강민성 Minseong Kang , 김양원 Yangwon Kim , 노동규 Donggyu Roh , 김명회 Myunghoi Kim
DOI: JANT Vol.27(No.5) 587-593, 2023
In this paper, we propose a systematic design approach based on cavity-mode resonance analysis to improve the radiated susceptibility of cables in air vehicles. As electronic devices equipped in air vehicles substantially increase, enhancing the radiated susceptibility of internal cables becomes more challenging and significant. The proposed design approach provides an efficient method to avoid and suppress cavity-mode resonances using analytical methods to estimate the resonance frequencies and the current ratio induced by the cavity-mode resonances. It is demonstrated in simulated results that the proposed method offers a design solution for improving the radiated susceptibility and reduces the computation time by up to 99.6% compared to the previous design method.
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Efficient 5G Ceramic Antenna Manufacturing Architecture using Blockchain and Smart Contracts
안성용 Sung Yong An , Guy Ngayo , 홍승필 Seng-phil Hong
27(5) 594-609, 2023
안성용 Sung Yong An , Guy Ngayo , 홍승필 Seng-phil Hong
DOI: JANT Vol.27(No.5) 594-609, 2023
This research introduces a novel approach to address the complexities of the 5G ceramic antenna manufacturing process through the utilization of a blockchain-based 5G ceramic antenna manufacturing (B-5GAM) architecture. By seamlessly integrating blockchain technology and smart contracts, this architecture enhances transparency, security, and efficiency within the realm of 5G ceramic antenna manufacturing. The impact of applying blockchain to enhance security measures, process efficiency, and overall reliability is evident, not only optimizing the production process but also establishing a robust foundation for future advancements in communication technology. Validation of the B-5GAM architecture was achieved by manufacturing 5G antennas and implementing blockchain and smart contracts through algorithm proposals, confirming their practicality in real manufacturing environments. The results of this study demonstrate the feasibility of employing blockchain and smart contracts in the field of 5G ceramic antenna manufacturing, confirming their potential to enhance manufacturing efficiency and reliability.
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Data Load Process of large-sized media for avionics using FTP and JSON
최지환 Ji-hwan Choi , 최낙민 Nak-min Choi , 신재권 Jae-kwon Shin
27(5) 610-620, 2023
최지환 Ji-hwan Choi , 최낙민 Nak-min Choi , 신재권 Jae-kwon Shin
DOI: JANT Vol.27(No.5) 610-620, 2023
The interest in the aircraft interior market is gradually growing due to technological development based on the 4th industrial revolution and competition for airlines to attract customers, and as part of that, Cabin Display System (CDS) for FAA Part.25 civil aircraft is being developed in Korea. The CDS is a system that provides various multimedia services to passengers by utilizing Flexible and Transparent Organic Light Emitting Diodes (OLED) with Integrated Display Processing Module (IDPM). This paper presents a new method for efficient Data Load Process of large-sized files and deals with their implementation and performance. The results of this study are expected to be applied to Data Load Process development of avionics that require reliable large-capacity file transmission along with reducing the costs of development compared to existing ARINC-615A.
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Reverse Engineering Procedure of Metal Brake Pad for Part 25 Aircraft
김민지 Min-ji Kim , 김경일 Kyung-il Kim , 김경택 Kyung-taek Kim
27(5) 621-628, 2023
김민지 Min-ji Kim , 김경일 Kyung-il Kim , 김경택 Kyung-taek Kim
DOI: JANT Vol.27(No.5) 621-628, 2023
This study derived a reverse engineering procedure for verifying the design identity of original parts and developed parts for PMA(Parts Manufacturer Approval) and STC(Supplemental Type Certificate) of metal brake pads for transport aircraft, which are critical parts among aircraft parts and equipment. In Korea, the regulations for reverse engineering procedures are regulated by the Parts Manufacturer Approval Guidelines, and in the United States, AC No. 21. 303-4. In the reverse engineering for the brake pad, the detailed procedures for each component were determined by selecting verification test items to confirm identity based on sample quantity, dimensional tolerance, mechanical property measurement, material, weight and volume characteristics for each component. In addition, as a result of analyzing the regulation of Korea and United States, in the case of Korea, it is necessary to establish technical standards for braking systems for transport aircraft and regulations related to flight tests.
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Design of Miniaturized Wideband Tapered Slot Antenna Using Slots Combining Fan-shaped Structures
여준호 Junho Yeo , 이종익 Jong-ig Lee
27(5) 629-634, 2023
여준호 Junho Yeo , 이종익 Jong-ig Lee
DOI: JANT Vol.27(No.5) 629-634, 2023
In this paper, the design of a miniaturized wideband tapered slot antenna using slots combining various types of fan-shaped structures was studied. To miniaturize the tapered slot antenna and make it operate at low frequencies, slots combining fan-shaped structures were added to the ground plane of the tapered slot antenna. The miniaturization design process of the final proposed antenna was systematically explained by comparing the input reflection coefficient and gain variations when each fan-shaped structure was appended, compared to when there was no slot. The proposed miniaturized wideband tapered slot antenna using slots combining the fan-shaped structures was fabricated on an RF-35 substrate and its measured characteristics were compared with the simulation results. Experiment results show that the frequency band with a voltage standing wave ratio (VSWR) less than 2 was 2.59-11.39 GHz, and gain within the band was measured to be 3.3-7.0 dBi. The proposed miniaturized wideband tapered slot antenna can be reduced in size by 36.9%, compared to when there are no slots in the ground plane.
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Designing Integrated Development Environments and Integration Agents for Intelligent Software Development
서민기 Min-gi Seo , 정다나 Da-na Jung , 조연제 Yeon-je Cho , 신주철 Ju-chul Shin , 김성우 Seong-woo Kim
27(5) 635-642, 2023
서민기 Min-gi Seo , 정다나 Da-na Jung , 조연제 Yeon-je Cho , 신주철 Ju-chul Shin , 김성우 Seong-woo Kim
DOI: JANT Vol.27(No.5) 635-642, 2023
With the development of artificial intelligence technology, drones are evolving beyond simple remote control tools into intelligent drones that perform missions autonomously. The importance of drones is gradually gaining attention due to the use of drones in overseas military conflicts and the analysis of the future operational environment in Korea. AMAD is proposed for the rapid development of intelligent drones. In order to develop intelligent software based on AMAD, an integrated development environment (IDE) that supports users with functions such as debugging, performance evaluation, and monitoring is essential. In this paper, we define the concepts of the development environment required for intelligent software development and describe the results of reflecting them in the design of the IDE and AMAD's agents, SVI and MPD, which are interfaced with the IDE.
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Development of status monitoring tools for KASS system operation
손민혁 Minhyuk Son , 이병석 Byungseok Lee
27(5) 643-648, 2023
손민혁 Minhyuk Son , 이병석 Byungseok Lee
DOI: JANT Vol.27(No.5) 643-648, 2023
The Korea Augmentation Satellite System is an SBAS system being developed with the goal of providing SoL (Safety of Life) in accordance with ICAO (International Civil Aviation Organization) standards by December 2023. Monitoring the status of the system is essential for the continuous provision of KASS services, and a status monitoring tool should be developed for this purpose. The development of a status monitoring tool was divided into SYSRT (SYStem Real Time monitoring tool), SMSPP (Subsystem Monitoring Statistics tool for Post Processing) depending on the purpose. Tool development was completed through a series of procedures: requirements definition, design, development, and verification. To verify the status monitoring tool, the KASS system’s real data (August 2023) were used to verify it, and the results were statistically analyzed to derive operating time and operating rate. It plans to use these tools to support continuous service provision for SoL service starting after this year.
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Estimation of Domestic Aircraft Fuel Consumption and Improved Accuracy
홍혜진 Hyejin Hong , 최지헌 Jihun Choi , 구성관 Sungkwan Ku
27(5) 649-657, 2023
홍혜진 Hyejin Hong , 최지헌 Jihun Choi , 구성관 Sungkwan Ku
DOI: JANT Vol.27(No.5) 649-657, 2023
ICAO adopted the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) at the 39th General Assembly in 2016, and 115 countries, including South Korea, expressed their intention to participate in CORSIA as of January 1, 2023. Since carbon generated in the aviation industry is mainly caused by greenhouse gases emitted from aircraft engines, fuel consumption must be reduced to reduce carbon emissions. Prior research, such as simulation, is essential to predict the effectiveness of each plan and to make decisions about its implementation. High-quality data is needed to derive accurate results, but it has been difficult to secure actual fuel consumption data, as they are considered to be classified airline data. Therefore, in this paper, after establishing a model that estimates fuel consumption based on actual fuel consumption data, the model is to be advanced to improve its accuracy.
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Analysis of Associated Factors for Aircraft Takeoff Weight Estimation (Based on B737-800)
이승표 Seung-pyo Lee , 구성관 Sung-kwan Ku
27(5) 658-665, 2023
이승표 Seung-pyo Lee , 구성관 Sung-kwan Ku
DOI: JANT Vol.27(No.5) 658-665, 2023
Take-off weight is a key factor for improving accuracy when estimating an aircraft's carbon emissions and fuel consumption. However, the takeoff weight contains sensitive payload information that can infer the airline's management strategy, making it impossible to leak it outside. Although several models for estimating takeoff weight have been presented in previous studies, the researcher points out that there are limitations of the study caused by variables at the pilot’s discretion. In this paper, several variables related to takeoff weight are identified to suggest a way to control these limits. Among them, variables that can improve the accuracy of takeoff weight are selected and an estimation equation is presented by applying them to ADS-B information. The proposed estimation does not estimate the average takeoff weight but has the advantage of being able to estimate all ranges of the takeoff weight.
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Estimated Analysis for Runway Occupancy Time Improvement
박광훈 Gwanghoon Park , 강금석 Gumseock Kang , 구성관 Sungkwan Ku
27(5) 666-673, 2023
박광훈 Gwanghoon Park , 강금석 Gumseock Kang , 구성관 Sungkwan Ku
DOI: JANT Vol.27(No.5) 666-673, 2023
The runway occupancy time of landing aircraft is an important factor in determining runway capacity. The purpose of this study is to suggest improvement measures for runway occupancy time to improve the operation of existing airports. In order to derive improvement measures, a comparative analysis was conducted on the effectiveness of improvement using aircraft operation status data for specific days at the case airport. The FAA REDIM model was used to analyze the improvement plan, and the improvement application function of the model was used to confirm the effect of improving runway capacity by adding a rapid escape taxiway to an airport without a rapid escape taxiway. This study's approach can be applied to the derivation of runway improvement measures and preliminary prediction of effectiveness, and it presents cases that can be applied to future airport construction projects or airport improvement projects.
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MLP Based Real-Time Gravity Disturbance Compensation in INS Embedded Computer
김현석 Hyun-seok Kim , 김형수 Hyung-soo Kim , 최윤혁 Yun-hyuk Choi , 조윤철 Yun-chul Cho , 박찬식 Chan-sik Park
27(5) 574-584, 2023
김현석 Hyun-seok Kim , 김형수 Hyung-soo Kim , 최윤혁 Yun-hyuk Choi , 조윤철 Yun-chul Cho , 박찬식 Chan-sik Park
DOI: JANT Vol.27(No.5) 574-584, 2023
In this paper, a real-time prediction technique for gravity disturbances is proposed using a multi-layer perceptron (MLP) model. To select a suitable MLP model, 4 models with different network sizes were designed to compare the training accuracy and execution time. The MLP models were trained using the data of vehicle moving along the surface of the sea or land, including their positions and gravity disturbance. The gravity disturbances were calculated using the 2160th degree and order EGM2008 with SHM. Among the models, MLP4 demonstrated the highest training accuracy. After training, the weights and biases of the 4 models were stored in the embedded computer of the INS to implement the MLP network. MLP4 was found to have the shortest execution time among the 4 models. These research results are expected to contribute to improving the navigation accuracy of INS through gravity disturbance compensation in the future.
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Forest Fire Detection System using Drone Streaming Images
Yoosin Kim
27(5) 685-689, 2023
Yoosin Kim
DOI: JANT Vol.27(No.5) 685-689, 2023
The proposed system in the study aims to detect forest fires in real-time stream data received from the drone-camera. Recently, the number of wildfires has been increasing, and also the large scaled wildfires are frequent more and more. In order to prevent forest fire damage, many experiments using the drone camera and vision analysis are actively conducted, however there were many challenges, such as network speed, pre-processing, and model performance, to detect forest fires from real-time streaming data of the flying drone. Therefore, this study applied image data processing works to capture five good image frames for vision analysis from whole streaming data and then developed the object detection model based on YOLO_v2. As the result, the classification model performance of forest fire images reached upto 93% of accuracy, and the field test for the model verification detected the forest fire with about 70% accuracy.
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