A Study on Factors Influencing Helicopter Pilot Training Using Factor Analysis
박철 Chul Park
27(4) 323-329, 2023
박철 Chul Park
DOI: JANT Vol.27(No.4) 323-329, 2023
This study aims to examine the factors influencing successful flight training performance in helicopter pilot education. To this end, an exploratory factor analysis was used to extract individual cognitive and non-cognitive characteristics, and a hierarchical regression analysis was conducted to find out how these characteristics (factors) affect flight training performance. As a result, it was found that the higher the spatial perception ability, resilience, and mastery goal-oriented learning attitude, the higher the flight training performance had a positive effect. This reconfirms the importance of spatial awareness, which is particularly required for pilots, and reconfirms that the role of a flight instructor in a limited cockpit space and the right motivation and effort of an individual affect flight training performance. These results are expected to be useful indicators for effective flight training of helicopter pilots in the future.
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A Study on the Establishment of Education and Training Program for Urban Air Mobility(UAM) Pilot in Korea
조영진 Young-jin Cho , 박철 Chul Park , 임세훈 Se-hoon Yim
27(4) 330-336, 2023
조영진 Young-jin Cho , 박철 Chul Park , 임세훈 Se-hoon Yim
DOI: JANT Vol.27(No.4) 330-336, 2023
Rapid urbanization is rapidly progressing around the world, and urban problems such as traffic congestion, environmental pollution, and noise pollution are emerging, due to this urban concentration phenomenon, logistics and transportation costs are increasing.
Urban Air Mobility(UAM) is a three-dimensional futuristic urban transportation that is expected to become an important transportation axis of smart cities as a service(MaaS) linked to roads, railways, and personal transportation.
However, as of July 2023, research on airspace systems, Bertieport design, navigation, and communication for UAM operation is actively being conducted, but little research has been conducted on the concept of pilot education and training and education and training programs. Therefore, this paper aims to present a suitable plan for the domestic pilot training system through SWOT analysis of vertical takeoff and landing(VTOL) pilot education and training programs in the United States and Europe.
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Analysis of Satellite Orbit Elements and Study of Constellation Methods for Micro-satellite System Operation
이성섭 Soung Sub Lee , 손지혜 Jihae Son , 송영범 Youngbum Song
27(4) 337-345, 2023
이성섭 Soung Sub Lee , 손지혜 Jihae Son , 송영범 Youngbum Song
DOI: JANT Vol.27(No.4) 337-345, 2023
This study analyzes considerations for satellite orbit elements for the national micro-satellite system to effectively perform its mission in accordance with the operational concept, and compares the conventionally used Walker method to improve the performance of the satellite constellation method of the repeating ground track orbit. In satellite orbit element analysis, altitude candidate values of micro-satellite system, use of eccentricity and argument of perigee through frozen orbit, necessity of selection of appropriate orbit inclination, and satellite phasing rules for flying the same repeating ground track orbit are proposed. Based on these analysis results, the superiority of the constellation method of the repeating ground track orbit compared to the Walker method is verified in terms of revisit performance analysis, global coverage characteristics, and orbit consistency.
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Comparative of Safety Culture Perceptions of European and Korean Airline Flight Crews
김현덕 Kim Hyeon-deok
27(4) 346-350, 2023
김현덕 Kim Hyeon-deok
DOI: JANT Vol.27(No.4) 346-350, 2023
The International Civil Aviation Organization (ICAO) introduced a safety management system in the aviation sector for aviation safety and mandated the implementation of safety management systems and national safety programs. The activation of the airline's safety management system is not just a requirement for organizational members to create and comply with necessary regulations, but a safety culture to promote and improve flight safety must be established within the organization. Therefore, the safety culture of airlines acts as a major key variable in the safety management system that directly affects safety performance. This study compared the data from the European pilot safety culture awareness, which was the basic data of the survey, with statistics on the safety culture awareness of domestic flight attendants to analyze the differences in safety culture between the two groups.
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A Study on the Development of Advanced LOSA Method
최지헌 Jihun Choi
27(4) 351-355, 2023
최지헌 Jihun Choi
DOI: JANT Vol.27(No.4) 351-355, 2023
The need for Advanced LOSA arises from the limitations and drawbacks of traditional LOSA. Amended LOSA aims to address some of the shortcomings of the original methodology and make it more effective and relevant to current aviation safety needs. Some of the key reasons for developing Advanced LOSA include Enhancing the scope, Improving data collection and analysis, Providing more targeted safety recommendations. First, Traditional LOSA mainly focuses on flight deck operations, but Advanced LOSA expands the scope to include other operational areas such as cabin operations, ground handling, and maintenance. Second, Advanced LOSA can build a Forecasting System that can predict the future through data collection and data analysis. Third, Advanced LOSA aims to provide more specific and targeted safety recommendations based on the Aviation data collection and Aviation data analysis. Overall, Advanced LOSA seeks to improve aviation safety by addressing the limitations of traditional LOSA and providing a more comprehensive and effective methodology for identifying and mitigating safety risks in aviation operations.
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Safety evaluation of the domestic Offset procedure using the unidirectional dual airway collision risk model
박세은 Se-eun Park , 김휘양 Hui-yang Kim
27(4) 356-364, 2023
박세은 Se-eun Park , 김휘양 Hui-yang Kim
DOI: JANT Vol.27(No.4) 356-364, 2023
Sophisticated Air Navigation System has contributed to enhancing the capacity of airspace capacity, leading to an efficient airspace environment. However, it has acted as a factor increasing the probability of collision. When an aircraft fails to maintain vertical separation and instead exhibits lateral positional errors, it does not necessarily lead to a collision. However, as the lateral positional accuracy increases, the randomness of aircraft positions decrease, resulting in an elevated probability of collisions. Consequently, The International Civil Aviation Organization has introduced Strategic Lateral Offset Procedures(SLOP), intentionally deviating aircraft from the centerline of airways. Likewise, South Korea also operates Offset procedure. The Y579 was operated using the Offset before its conversion to a dual airway and the analysis of the Offset track revealed that it was being operated similarly to a unidirectional dual airway. This paper develops a safety assessment methodology applicable to unidirectional dual airways, and applies it to perform a safety assessment of the Y579 Offset procedure.
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Real-time Path Replanning for Unmanned Aerial Vehicles: Considering Environmental Changes using RRT* and LOSPO
안정우 Jung Woo An , 우지원 Ji Won Woo , 김현섭 Hyeon Seop Kim , 박상윤 Sang Yun Park , 남경래 Gyeon Rae Nam
27(4) 365-373, 2023
안정우 Jung Woo An , 우지원 Ji Won Woo , 김현섭 Hyeon Seop Kim , 박상윤 Sang Yun Park , 남경래 Gyeon Rae Nam
DOI: JANT Vol.27(No.4) 365-373, 2023
Unmanned aerial vehicles are widely used in various fields, and real-time path replanning is a critical factor in enhancing the safety and efficiency of these devices. In this paper, we propose a real-time path replanning technique based on RRT* and LOSPO. The proposed technique first generates an initial path using the RRT* algorithm and then optimizes the path using LOSPO. Additionally, the optimized path can be converted into a trajectory that considers actual time and the dynamic limits of the aircraft. In this process, environmental changes and collision risks are detected in real-time, and the path is replanned as needed to maintain safe operation. This method has been verified through simulation-based experiments. The results of this paper make a significant contribution to the research on real-time path replanning for UAVs, and by applying this technique to various situations, the safety and efficiency of UAVs can be improved.
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A Study of the C-band Ground-based Radio Navigation System for UAM Cooperative Navigation
이경순 Kyung-soon Lee , 조용운 Yong-un Cho , 김민정 Min-jung Kim , 구경헌 Kyung Heon Koo
27(4) 374-381, 2023
이경순 Kyung-soon Lee , 조용운 Yong-un Cho , 김민정 Min-jung Kim , 구경헌 Kyung Heon Koo
DOI: JANT Vol.27(No.4) 374-381, 2023
This study focuses on the implementation of C-band radio navigation in the 5.03 ~ 5.15 GHz terrestrial band to cooperate with GNSS navigation mainly used in existing UAMs. This is one of the navigation technologies that can fully satisfy the requirements of Title 14 of CFR-135.165. According to the FAA, the use of two or more independent navigation sources for aircraft is proposed for aircraft. This study proceeded with the link budget derivation through radio wave propagation path loss analysis, and antenna shape design for miniaturized Doppler VOR, and DME design with enhanced positional distance resolution compared to conventional aircraft. The ground navigation system which is the result of this study, consists of a VOR/DME ground station and a terminal that can be mounted on UAM. Significant performance was confirmed through the production and testing of each prototype.
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The Study on Development on LUAV Software based on DO-178
권지훈 Ji-hun Kwon , 이동민 Dong-min Lee , 박경민 Kyung-min Park , 나예원 Ye-won Na , 김예주 Ye-ju Kim , 이기명 Gi-moung Lee , 나종화 Jong-whoa Na
27(4) 382-390, 2023
권지훈 Ji-hun Kwon , 이동민 Dong-min Lee , 박경민 Kyung-min Park , 나예원 Ye-won Na , 김예주 Ye-ju Kim , 이기명 Gi-moung Lee , 나종화 Jong-whoa Na
DOI: JANT Vol.27(No.4) 382-390, 2023
The Korea market for LUAV (Light Unmanned Aerial Vehicle) weighing less than 150 kg is growing rapidly. As a result, the market for manufacturing and operating LUAV is expanding, and domestic development of parts and finished products is actively taking place. However, the flight control system and onboard software, which are key components of domestic LUAV, are largely dependent on overseas products due to the excessive cost and period required for development. This paper presented a domestic software development and certification procedure using DO-178C, a guideline for aircraft software development, and the Model-based Development method, and conducted a survey of those involved in the development, manufacturing, and certification of LUAV and analyzed the results. In addition, a case study was conducted to apply the software development plan to the helicopter FCC (Flight Control Computer).
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Performance Analysis of Machine Learning Based Spatial Disorientation Detection Algorithm Using Flight Data
Yim Se-hoon , Park Chul , Cho Young Jin
27(4) 391-395, 2023
Yim Se-hoon , Park Chul , Cho Young Jin
DOI: JANT Vol.27(No.4) 391-395, 2023
Helicopter accidents due to spatial disorientation in low visibility conditions continue to persist as a major issue. These incidents often stem from human error, typically induced by stress, and frequently result in fatal outcomes. This study employs machine learning to analyze flight data and evaluate the efficacy of a flight illusion detection algorithm, laying groundwork for further research.
This study collected flight data from approximately 20 pilots using a simulated flight training device to construct a range of flight scenarios. These scenarios included three stages of flight: ascending, level, and descent, and were further categorized into good visibility conditions and 0-mile visibility conditions. The aim was to investigate the occurrence of flight illusions under these conditions.
From the extracted data, we obtained a total of 54,000 time-series data points, sampled five times per second. These were then analyzed using a machine learning approach.
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A Study on Deployment of Inland Reference Stations for Optimizing Marine and Inland User Performance Using Precise PNT
이예빈 Yebin Lee , 박병운 Byungwoon Park
27(4) 396-409, 2023
이예빈 Yebin Lee , 박병운 Byungwoon Park
DOI: JANT Vol.27(No.4) 396-409, 2023
In the field of autonomous vehicles, where high accuracy and reliability are critical, various satellite navigation augmentation systems have been developed to improve system performance. These systems generate correction and integrity information based on measurements and navigation data collected from ground reference stations, enhancing user positioning accuracy. Thus, the performance of the system heavily relies on the deployment and spacing of reference stations. To construct an effective satellite navigation augmentation system, careful consideration must be given to the installation points of reference stations. This paper presents a user positioning performance modeling formula and proposes a method for selecting the installation points of new reference stations. The proposed method involves selecting a candidate group area that can optimize the user’s positioning performance. By utilizing this method, the system’s performance can be improved, ensuring high accuracy and reliability for autonomous vehicle applications.
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Performance Analysis of Low Earth Orbit Satellite Communication Systems Under Multi-path Fading Environments
이해욱 Hae-uk Lee , 류영빈 Young-bin Ryu , 오혁준 Hyuk-jun Oh
27(4) 410-416, 2023
이해욱 Hae-uk Lee , 류영빈 Young-bin Ryu , 오혁준 Hyuk-jun Oh
DOI: JANT Vol.27(No.4) 410-416, 2023
Unlike geostationary satellite communication systems, low-earth orbit(LEO) satellite communication systems move at relatively high speeds, and the angle with the ground device is not fixed and varies over a wide range. The propagation channel condition between satellites and ground nodes cannot be assumed line of sight(LOS) anymore. This paper analyzes the low-orbit multi-path fading satellite channel model that can occur in LEO satellite communication systems and Doppler frequency transition caused by high-speed maneuvering of LEO satellites and presents effective equalization techniques for OFDM and SC-FDE transmission methods suitable for multi-path frequency selective fading satellite channel models. In addition, this paper compares and analyzes the performance of OFDM and SC-FDE transmission methods in multipath fading LEO satellite channel environment using the proposed equalization techniques through simulations. Simulation results showed that SC-FDE outpeformed OFDM.
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Characteristics of 3-dB Coupler using Broadside Slot Coupled Lines
김영 Young Kim
27(4) 417-422, 2023
김영 Young Kim
DOI: JANT Vol.27(No.4) 417-422, 2023
This paper presents various methods for implementing 3-dB coupler using a broadside slot coupled lines and analyze its characteristics. The ideal coupler of the tandem structure is analyzed on the premise that both the reflection coefficient and the isolation coefficient of the first and second coupler connections are zero. However, since the reflection and isolation coefficients of most couplers are not zero, the S-parameter cascade calculation method was used to check how to the characteristics of the coupler change due to this. In order to confirm that these characteristics appear, a 3-dB coupler was fabricated with one stage and two and three stages of a tandem structure using a broadside slot coupled lines at a center frequency of 2 GHz, and it was confirm that the characteristics of tandem coupler change due to the non-zero reflection coefficient and isolation coefficient of the connection part of the coupler.
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Proposal for guided missile actuator device inspection using data acquisition device
정의재 Eui-jae Jung , 오택근 Sang-hoon Koh , 이정민 You-sang Lee , 유필중 Young-sung Kim
27(4) 423-428, 2023
정의재 Eui-jae Jung , 오택근 Sang-hoon Koh , 이정민 You-sang Lee , 유필중 Young-sung Kim
DOI: JANT Vol.27(No.4) 423-428, 2023
In the missile actuator system, the time and position of the wings of the drive device are very important factors in the initial maneuver of the missile, and therefore, the missile actuator device must be inspected while ensuring the accuracy and real-time of motion collection data of the actuator.
In this study, the difference between the design and implementation method for checking the existing actuator device and the design implementation method of the actuator device through the DAQ(Data Acquisition) device is compared, and the difference in data collection amount and real-time data collection performance is compared and tested, and the data shown through actual tests are compared. is converted into a graph, the actuator waveform is compared and analyzed, and based on the analyzed data, DAQ device inspection configuration that guarantees real-time response speed and stability during inspection of existing actuators and DAQ devices is proposed.
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A design of FACE-compliant IOS and TS segments architecture based on ARINC653 in avionics system
이두환 Doo-hwan Lee , 남영욱 Young-uk Nam , 조경연 Kyeong-yeon Cho , 윤지용 Ji-yong Yoon
27(4) 429-435, 2023
이두환 Doo-hwan Lee , 남영욱 Young-uk Nam , 조경연 Kyeong-yeon Cho , 윤지용 Ji-yong Yoon
DOI: JANT Vol.27(No.4) 429-435, 2023
The increasing complexity of avionics systems has emphasized the portability and reusability of software components. In this paper, a structural design method for IOSS (Input Output Service Segment) and TSS (Transport Service Segment) complying with the FACE (The Future Airborne Capability Environment) standard in the VxWorks 653 operating environment that satisfies ARINC 653 requirements is described. IOSS and TSS operate independently in different partitions to minimize time/space separation and the influence of other software, and to increase portability and reusability, strategy patterns among design patterns are applied. In addition, IOSS provides external interface service by applying distributed IO service structure, and among external interfaces, the ARINC 664 P7 interface of FACE-compliant equipment is placed in TSS to optimize the data movement path.
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Case Study of Electronic Fuel Injection Powertrain System FMEA Using Model-Based Fault Injection technique
김예주 Ye-ju Kim , 나예원 Ye-won Na , 이동민 Dong-min Lee , 김주영 , 나종화 Jong-whoa Na
27(4) 436-446, 2023
김예주 Ye-ju Kim , 나예원 Ye-won Na , 이동민 Dong-min Lee , 김주영 , 나종화 Jong-whoa Na
DOI: JANT Vol.27(No.4) 436-446, 2023
In the field of safety-critical systems, analyzing the effects of various failure factors (failure modes) is essential through Failure Mode and Effects Analysis (FMEA). However, with the increasing importance of software in systems, applying FMEA analysis to the design phase has become challenging. This paper proposes the use of Automatic FMEA, which can automatically perform FMEA using model-based design techniques, and presents a case study of FMEA for automotive engines. A comparison is made between the model-based Automatic FMEA analysis tool and existing FMEA tools. The study aims to demonstrate the performance of the Automatic FMEA analysis tool and propose future research plans.
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Gain Enhancement of Double Dipole Quasi-Yagi Antenna Using Meanderline Array Structure
여준호 Junho Yeo , 이종익 Jong-ig Lee
27(4) 447-452, 2023
여준호 Junho Yeo , 이종익 Jong-ig Lee
DOI: JANT Vol.27(No.4) 447-452, 2023
In this paper, gain enhancement of a double dipole quasi-Yagi antenna using a meanderline array structure was studied. A 4×1 meanderline array structure consisting of a meanderline conductor- shaped unit cell is located above the second dipole of the double dipole quasi-Yagi antenna. It was designed to have gain over 7 dBi in the frequency range between 1.70 and 2.70 GHz in order to compare the performance with the case using a conventional strip director. As a result of comparison, the average gain of the double dipole quasi-yagi antenna with the proposed meander line array structure was larger compared to the case with the conventional strip director. A double dipole quasi-Yagi antenna using the proposed meanderline array structure was fabricated on an FR4 substrate and its characteristics were compared with the simulation results. Experiment results show that the frequency band for a VSWR less than 2 was 1.55-2.82 GHz, and the frequency band for gain over 7 dBi was measured to be 1.54-2.83 GHz. The frequency bandwidth with gain over 7 dBi increased, and average gain also slightly increased, compared to the conventional case using a strip director.
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A study on the datalink Interface between fighter jet RADAR and BVR AA guided missile
김용민 Yong-min Kim
27(4) 453-456, 2023
김용민 Yong-min Kim
DOI: JANT Vol.27(No.4) 453-456, 2023
Fighter jets employ guided missiles equipped with seekers to counter enemy air threats. Short range guided missiles(SRM) usually carry infrared(IR) seekers and are used to engage targets within visual range. On the other hand, medium range guided missiles(MRM) often utilize radio frequency(RF) seekers to engage targets beyond visual range. Medium range guided missiles do not activate their seekers until they reach the detection range of the seeker, and the aircraft's radar guides them for a certain distance. This guidance method is called Missile Data Link(MDL), and it can be implemented in either one-way or two-way communication modes, depending on the missile's communication system. In this paper, we discuss MDL based on these two communication modes, along with the integration of RADAR, mission computers, and guided missiles.
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MSSI System with Dispersion-managed Link Configured with Random-inverse Dispersion Maps
이성렬 Seong-real Lee
27(4) 457-462, 2023
이성렬 Seong-real Lee
DOI: JANT Vol.27(No.4) 457-462, 2023
We proposed a flexible link configuration in a system combining mid-span spectral inversion (MSSI) and dispersion management used for long-distance transmission of high-capacity optical signals such as wavelength division multiplexing signals, and examined specific methods to increase chromatic dispersion and nonlinear distortion compensation effects. The dispersion map proposed to increase the flexibility of dispersion-managed link configuration has a 'random-inverse' structure. That is, in the proposed dispersion map, the residual dispersion per span (RDPS) of each fiber span in the first half section up to the optical phase conjugator is randomly distributed, and the RDPS distribution in the second half section reverses the distribution pattern of the first section. Although the proposed dispersion map has a random distribution of RDPS, it was confirmed that the distortion compensation effect is improved due to the fact that the dispersion profile is symmetrical with respect to the optical phase conjugator. In the dispersion map of the 'random-inverse' configuration, it was also confirmed that the compensation effect of the distorted wavelength division multiplexing signal becomes improved when the magnitude of the RDPS allocated to each fiber span is large.
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Design of Reconfigurable Dual Polarization Patch Array Antenna
이원준 Won Jun Lee , 차영직 Young Jik Cha
27(4) 463-468, 2023
이원준 Won Jun Lee , 차영직 Young Jik Cha
DOI: JANT Vol.27(No.4) 463-468, 2023
In this paper, we proposed reconfigurable dual polarization patch array antenna that can select two polarizations(Vertical, RHCP) using defected ground structure and Pin diode. The proposed antenna was designed arranging a circular polarization patch antenna implemented with a square microstrip patch and two slots 3x3 at 25.8mm placed, a half-wavelength of 5.8 GHz. Conect the pin diode and the capacitor to the slot diagonally placed on the ground of each antennas, and select polarization using the open/short operating according to the application of DC voltage to the pin diode. As a result of the design, the gain of the antenna is 11.7 dBi at vertical polarization and 11.6 dBic at RHCP. The axial ratio is 20.3 dB at 1.8 dB vertical polarization at RHCP. Mutual Coupling is Maximum to -20.8 dB for vertical polarization and Maximum to -30.1 dB for RHCP.
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SAW Sensor Network Design and Reflected Waves Removal for Temperature Measurement
Kyung-soon Lee , Kyung Heon Koo
27(4) 469-472, 2023
Kyung-soon Lee , Kyung Heon Koo
DOI: JANT Vol.27(No.4) 469-472, 2023
If temperature management is required in factory or environmental monitoring, temperature can be measured by connecting various sensors wired or wirelessly. Surface acoustic wave sensors measure temperature using changes in acoustic waves on the sensor surface according to temperature, and are useful for wireless networks. In this paper, in order to build a wireless temperature measurement system in the 900 MHz frequency band, the temperature characteristics of the passive SAW sensor were measured, and the analysis and removal of multipath reflection wave effect inside the high temperature chamber were conducted. The resonant frequency of the SAW sensor was measured, and radio transmission/reception and multipath reflected wave removal techniques were proposed in the shielded chamber.
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Evaluation of Novel Method of Hand Gesture Input to Define Automatic Scanning Path for UAV SAR Missions
오창근 Chang-geun Oh
27(4) 473-480, 2023
오창근 Chang-geun Oh
DOI: JANT Vol.27(No.4) 473-480, 2023
This study evaluated a novel method of defining the automatic flight path of unmanned aerial vehicles (UAVs) for search and rescue missions in a VR environment. The developed VR content reserves miniature digital twins of a building in the fire and a steep mountain terrain site. The users drow the UAV’s scanning path using hand gestures on the surface of digital twins, and then the UAV make an automatic flight along the defined path. According to human-in-the-loop simulation tests comparing the novel method with a conventional manual flight task with 19 participants, the novel method did not improve the mission performance but participants felt a lower mental workload. The designer may need to consider the automation support on the vulnerable points of the SAR mission environment while maintaining experts’ mapping capability.
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A Study on Ground and Object Separation Techniques Utilizing 3D Point Cloud Data in Urban Air Mobility (UAM) Environments
구본수 Bon-soo Koo , 최인호 In-ho Choi , 유재림 Jae-rim Yu
27(4) 481-487, 2023
구본수 Bon-soo Koo , 최인호 In-ho Choi , 유재림 Jae-rim Yu
DOI: JANT Vol.27(No.4) 481-487, 2023
Recently, interest in UAM (Urban Air Mobility) has surged as a critical solution to urban traffic congestion and air pollution issues. However, efficient UAM operation requires accurate 3D Point Cloud data processing, particularly in separating the ground and objects. This paper proposes and validates a method for effectively separating ground and objects in a UAM environment, taking into account its dynamic and complex characteristics. Our approach combines attitude information from MEMS sensors with ground plane estimation using RANSAC, allowing for ground/object separation that is less affected by GPS errors. Simulation results demonstrate that this method effectively operates in UAM settings, marking a significant step toward enhancing safety and efficiency in urban air mobility. Future research will focus on improving the accuracy of this algorithm, evaluating its performance in various UAM scenarios, and proceeding with actual drone tests.
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A Study on Scenario-based Urban Flood Prediction using G2D Flood Analysis Model
노희성 Hui-seong Noh , 박기홍 Ki-hong Park
27(4) 488-494, 2023
노희성 Hui-seong Noh , 박기홍 Ki-hong Park
DOI: JANT Vol.27(No.4) 488-494, 2023
In this paper, scenario-based urban flood prediction for the entire Jinju city was performed, and a simulation domain was constructed using G2D as a 2-dimensional urban flood analysis model. The domain configuration is DEM, and the land cover map is used to set the roughness coefficient for each grid. The input data of the model are water level, water depth and flow rate. In the simulation of the built G2D model, virtual rainfall (3 mm/10 min rainfall given to all grids for 5 hours) and virtual flow were applied. And, a GPU acceleration technique was applied to determine whether to run the flood analysis model in the target area. As a result of the simulation, it was confirmed that the high-resolution flood analysis time was significantly shortened and the flood depth for visual flood judgment could be created for each simulation time.
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