About
36
Publications
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231
Citations
Citations since 2017
Introduction
Our research interests include control and optimization for autonomous operations of unmanned assets, particularly UAV (Homepage: www.uaslaboratory.com).
Additional affiliations
January 2014 - April 2016
Education
January 2011 - December 2013
August 2009 - December 2010
August 2007 - August 2009
University of Minnesota Twin Cities
Field of study
- Mechanical Engineering
Publications
Publications (36)
This paper proposes a wireless power transfer (WPT) system for variant receiver (Rx) configuration, power distribution ratio, load and distance with multiple relays, each of which is connected to a resistive load. Each Rx relay transfers power to an adjacent Rx and acts as a relay while its local load consumes power. We develop a methodology for th...
얼마전인 2021년 9월 29일, 한국형 도심항공교통 (K-UAM) 운용개념서 1.0 1 이 발간되었고, 이 개념서에서 초 기 K-UAM 교통체계의 구조를 도식화하는 등 대한민국도 UAM(Urban Air Mobility) 산업에 첫발을 디디게 되었다. 이렇 듯 현재 국내외로 UAM 산업이 차세대 먹거리로 큰 각광을 받고 있고, 자동차 산업, 항공기 산업, 드론 산업, 통신 산업, 인프라 산업 등에서 일제히 UAM 산업 진행상황을 살피며 초읽기에 들어갔다. UAM 산업의 요소 중에서도 특히 핵심을 이루는 eVTOL(electric Vertical TakeOff and Landing) 개발의 주도 권은 아직까지 자동차산업...
We developed an octocopter-based unmanned aerial system (UAS) to monitor remote environments. The system contains various environmental monitoring sensors that measure wind speed and direction, temperature, relative humidity, atmospheric pressure, fine dust, and multispectral and RGB data. We studied the UAS—consisting of an unmanned aerial vehicle...
This study focuses on establishing a conceptual design for a multirotor unmanned aerial vehicle (UAV). The objectives of this octocopter are to reduce the number of flight cancelations and car accidents owing to low-visibility issues and to improve abnormal environmental conditions due to the presence of smoke. The proposed octocopter contains a co...
This editorial paper was a special issue of Applied Sciences belonging to the section of mechanical engineering in MDPI journal and summarized the collected manuscripts regarding the unmanned aerial vehicles (UAVs) related technologies, including communication, control, collision avoidance, modeling, path planning, human-machine interface (HMI), ar...
In this study, a wireless power transmission (WPT) system for high power was developed to supply the wirelessly powered transfer cart for a clean environment (such as liquid crystal display (LCD), semiconductor, and flat panel display (FPD) device industries) to improve the cleanliness of related industrial production lines and save energy. The pow...
Multispectral imagery contains abundant spectral information on terrestrial and oceanic targets, and retrieval of the geophysical variables of the targets is possible when the radiometric integrity of the data is secured. Multispectral cameras typically require the registration of individual band images because their lens locations for individual b...
A hybrid power system (HPS) is developed for the photovoltaic (PV) powered and tethered multirotor unmanned aerial vehicle (UAV) based on the robot operating system (ROS) and verified using an indoor hardware-in-the-loop (HIL) test. All the processes, including a UAV flight mode change (i.e., takeoff, hovering, and landing) and power flow control (...
Increasing the flight endurance of unmanned aerial vehicles (UAVs) has received attention recently. To solve this problem, two research topics have generally appeared: Shortest-path planning (SPP) and remaining-flying-range estimation. In this work, energy-efficient path planning by considering the distance between waypoint nodes, the minimum and m...
Water color analysis allows non-destructive estimation of abundance of optically active water constituents in the water body. Recently, there have been increasing needs for light-weighted multispectral cameras that can be integrated with low altitude unmanned platforms such as drones, autonomous vehicles, and heli-kites, for the water color analysi...
For a continuous surveillance mission using a swarm of multiple tethered low-altitude long-endurance (LALE) multirotor-type unmanned aerial vehicles (UAVs), we developed a 500 W class photovoltaic power management system (PPMS) which monitors voltage and current flows of photovoltaic (PV) panels, battery pack, and UAV and controls power flows to su...
This paper describes the degradation of launch performance caused by the remnants of a missile canister cover with a sabot interface, on interference with adjacent structures. First, by including the material plastic behavior and element deletion, we predict interference between the structures and the detached part, followed by excessive deformatio...
To achieve the continuous surveillance capable multirotor type solar-powered unmanned aerial vehicle (UAV), we develop the photovoltaic power management system (PPMS) which manages power from photovoltaic (PV) modules and a battery pack to support the power of the UAV. To estimate the possible flight time of the UAV, we use the concept of state of...
Due to the difficulty of the utilization of a satellite and an aircraft, conventional ocean color remote sensing has a disadvantage in that it is difficult to obtain images of desired places at desired times. These disadvantages make it difficult to capture the anomalies such as the occurrence of the red tide which requires immediate observation. I...
![Fig. 6. Minimum radius allowing UAV to change direction to [33].](profile/Sunghun-Jung-2/publication/322307042/figure/fig6/AS:668599488364553@1536417948784/Minimum-radius-allowing-UAV-to-change-direction-to-33_Q320.jpg)
Automated mission planning for unmanned aerial vehicles (UAVs) is difficult because of the propagation of several sources of error into the solution, as for any large scale autonomous system. To ensure reliable system performance, we quantify all sources of error and their propagation through a mission planner for operation of UAVs in an obstacle r...
We develop a wireless, contact free power transfer mechanism that is safer than the direct metallic contact and robust to imperfect alignment on landing at the base station. A magnetic field is created using inductors on both the transmitting and receiving sides. We use the inductive wireless recharging to increase autonomy and decrease the sensor...
We improve the performance of a low-quality GPS data on a UGV through use of multiple low-quality GPS modules on a UGV within line of sight of the UAV. The UGV sends GPS data corrections to the UAV on the basis of the distance from the UAV to the UGV as measured by scaling of a standard image pattern stuck on the UGV. Geolocation of both UGV and UA...
Customer requirements for unmanned aerial vehicles (UAVs) with long flight times are increasing exponentially in the personal, commercial, and military use areas. Due to their limited payload, large numbers of on-board battery packs cannot be used and this is the main reason behind the need for battery management software (BMS) packages with state...
As the UAV industry is getting matured, various types of UAVs have appeared in many application fields, including filming, reconnaissance, rescue, and etc. and it requires the quick hardware designs, particularly a battery pack, of the UAV. We developed the automatic battery pack design tool for the convenient battery pack configuration design of t...
Researchers are now faced with a limited flight time of the hoverable UAV due to the sluggish technological advances of the Li-Po energy density and try to find a bypassing solution for the fully autonomous hoverable UAV mission planning. Although there are several candidate solutions, automated wireless charging is the most likely and realistic ca...
Ignorance of battery pack life could bring unexpected UAV crashes and so the SOH estimation became a next important factor to the SOC estimation. In contrast to the EV applications, the small UAV could not carry heavy and complex BMS and so it is required to apply a simple, light, cheap, but powerful BMS to prevent any accident. In this paper, we s...
With a given spring-mass-damper system, H∞ and Mu-synthesis control methods are used to
build system controllers which minimize vibrations at two major natural frequencies in two cases; without
uncertainty; with 20% uncertainty. In order to check the stability and performance of two controllers, those
are examined using GM and PM values. The signal...
![Fig. 8. Traditional cattle drive strategy [29]. To mimic this...](profile/Sunghun-Jung-2/publication/318413211/figure/fig3/AS:667647897255954@1536191071777/Traditional-cattle-drive-strategy-29-To-mimic-this-traditional-strategy-cattle_Q320.jpg)
Four quadrotor UAVs are maneuvered to guide four animals into their pen within the minimum time by creating noises of predators modeled with an exponential function. The quadrotor UAVs are controlled via PID controllers, follow time optimal trajectories, and avoid collisions through altitude separations. The stability of the proposed PID controller...
UAVs began to be actively applied to so-called 3D jobs, including the autonomous exploration, investigation, mapping, search and rescue, etc. since the mid-2000s. With this global trend, having a precise controllability of the UAV will certainly revolutionize the life of the modern human in the aspect of tremendous applications of the UAV. In the f...
As the price of small UAVs is getting cheaper and its controllability is getting greatly increased, many aerial applications using both fixed-wing and hoverable UAVs have appeared in recent years. In this paper, a new aerial advertising method is proposed using four hoverable UAVs. Using the UAV swarm control method, four UAVs are maneuvered to car...
![Figure 3. A motor chosen for the Amazon delivery UAV[22]](profile/Sunghun-Jung-2/publication/317389269/figure/fig1/AS:502767248986112@1496880461624/A-motor-chosen-for-the-Amazon-delivery-UAV22_Q320.jpg)
The UAV, or also called drone, is extensively being spread out to various applications and last-mile
delivery service is one of the applications which attracts logistics companies including Amazon.com, Inc.
Although Amazon Prime Air delivery service using UAVs is widely advertised, slight amount of
Amazon delivery UAV information is revealed to pub...
The rise of eco-friendly personal electric mobility is a worldwide trend and the first Korean-made IT convergence electric skateboard, Youth Board, is developed to lead the trend. Youth Board is remotely controllable using either Youth Wearable Controller or Youth App through Bluetooth v4.0 communication, can speed up to 25 km/hr, and operating tim...
A study was conducted to convert a large class of integrated surveillance and reconnaissance (ISR) problems for passive targets in mapped regions to multiple traveling salesman problems (mTSP), which were solved offline to provide several alternative solutions stored offline for online use. The study performed these tasks to enable operational auto...
Multiple Traveling Salesman Problem (mTSP) with n number of nodes to be visited by m identical UAVs can be solved by transforming into m Traveling Salesman Problems (TSP) and then solved with improved Genetic Algorithm (GA). Within our framework of spatio- temporal discretization and offine calculation, this is done with the objective of maximal fu...
Highly automated mission planning for UAV brings almost proportional amount of error propagation and breaking this proportionality is a puzzling paradox. To prevent the domination of errors in developing fully autonomous UAV systems, accurate investigation of each error source should be performed. This paper inquires into possible error sources in...
We present a solar compass that can augment the heading estimation of UAVs when UAVs fly around the areas with large electromagnetic disturbances. Based on a hemispherical sensor geometry, light intensity sensors are used to determine the vector to the dominant light source, e.g. the sun, in the environment via least squares method. Using the sun v...
Performance of low-quality GPS attached on UAVs can be extensively improved by using three GPS modules on a UGV and using Image Detection algorithm called NyARToolkit algorithm. This implies that every UAV consisting of a group flight does not need to carry expensive GPS module since a low-quality GPS can be calibrated to be highly precise one. Thi...
Unmanned aerial vehicles (UAVs) need multiple operators as of today. Because of limitations of human attention and sensory cueing the operators cannot use all of the data coming in through these sensors. Large scale autonomy would mean the following: fewer operators, larger areas of coverage, and more vehicles. Rigorous optimization of decision the...
Projects
Projects (5)
Development of a hybrid power source-based long-endurance vertical take-off and landing (VTOL) unmanned aerial system (UAS) and an image-based automatic hydrogen charging system for unmanned, continuous, and safe reconnaissance missions
Dear Colleagues,
Unmanned aerial vehicle (UAV) services such as sensing, mapping, goods and equipment delivery, inspection, and monitoring have started to grow rapidly with the rapidly falling prices of both drones and the sensors mounted on them. Many of these services involve the gathering of data and their processing with complex algorithms either in real time or in the cloud, and precise navigation and path-planning of the drones. We invite articles on all aspects of these problems involving UAV services, including data processing and sensor fusion, obstacle and collision avoidance, trajectory generation for single UAVs or groups of UAVs, communications and networks among UAVs, mission planning for various purposes, and so on.
Articles may be submitted in all the areas that currently abound in the news: inspection of farms, vineyards, ranch animals, petrochemical refineries, oil pipelines, and battlefields; delivery of pesticides and herbicides, food in restaurants, and packages to remote areas and residences; the cutting edge of photography, filming, and journalism; the mapping of various fields—optical, magnetic, acoustic, and chemical; and reconnaissance and tactical bombing in battlefield. Most of these applications have so far been performed by single UAVs, though use of a multiplicity of UAVs can significantly improve performance.
Dr. Sunghun Jung
Guest Editor
https://www.mdpi.com/journal/applsci/special_issues/Unmanned_Aerial_Vehicles_UAVs_II
