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Cellular Broadband for Civilian Application of Unmanned Aerial Vehicles
Kapseong Ro,Jun-Seok Oh,SangHak Lee 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
Unmanned Aerial Vehicles (UAV) are now an integral part of the modern warfare, and their potentials for civilian applications are boundless. The primary mission of UAV is to provide the aerial imageries of a site of interest in real-time to a user or responsible party in remote locations. This paper presents a case study of unmanned aerial vehicles (UAV) for possible civilian applications, in which a cellular broadband service is used for a data-link to relay real-time video imagery captured by onboard camera.
A Feasibility Study of Highway Traffic Monitoring using Small Unmanned Aerial Vehicle
Kapseong Ro,Jun-Seok Oh 한국항공우주학회 2007 International Journal of Aeronautical and Space Sc Vol.8 No.2
Traffic and emergency monitoring systems are essential constituents of Intelligent Transportation System (ITS) technologies, but the lack of traffic monitoring has become a primary weakness in providing prompt emergency services. Demonstrated in numerous military applications, unmanned aerial vehicles (UAVs) have great potentials as a part of ITS infrastructure for providing quick and real-time aerial video images of large surface area to the ground. Despite of obvious advantages of UAVs for traffic monitoring and many other civil applications, it is rare to encounter success stories of UAVs in civil application including transportation. The objective of this paper is to report the outcomes of research supported by the state agency in US to investigate the feasibility of integrating UAVs into urban highway traffic monitoring as a part of ITS infrastructure. These include current technical and regulatory issues, and possible suggestions for a future UAV system in civil applications.
Modeling and Simulation of Aircraft Motion on the Ground: Part I. Derivation of Equations of Motion
Ro, Kapseong,Lee, Haechang The Korean Society for Aeronautical and Space Scie 2001 International Journal of Aeronautical and Space Sc Vol. No.
Developed in these two series of paper is a complex dynamic model representing the motion of aircraft on the ground and a computer program for numerical simulation. The first part of paper presents the theoretical derivation of equations of motion of the landing gear system based on the physical principle. Developed model is 'structured' in the sense that the undercarriage system is regarded as an assembly of strut, tire, and wheel, where each component is modeled by a separate module. These modules are linked with two external modules-the aircraft and the runway characteristics-to carry out dynamic analysis and numerical simulation of the aircraft motion on the ground. Three sets of coordinate system associated with strut, wheel/tire and runway are defined, and external loads to each component and response characteristics are examined. Lagrangian formulation is used to derive the undercarriage equations of motion relative to the moving aircraft, and the resultant forces and moments from the undercarriage are transformed to aircraft body axes.
Performance Evaluation of DS-UWB based Short-range Radar in AWGN Environment
Jai-Chul Song,Dong-Doo Lee,Chang-Wha Lee,Jewel B. Barlow,Kapseong Ro,Jung-Su Han,Hyung Su Lee 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper presents a simulation based feasibility study of Direct Sequence Ultra-wideband technology (DS-UWB) based short-range radar for precision measurements; especially focusing upon development of a working hardware prototype. The use of DS-UWB technology for the short-range radar is well known for excellent power efficiency, less interference signal crossings among multiple homogeneous devices, and high resolution distance measurement, etc. In this study, a prototype hardware design is proposed and necessary simulation study is carried out to investigate the convergence characteristics of pseudo noise (PN) code autocorrelation signal. An additive white Gaussian noise (AWGN) environment is assumed and two types of interpolation method ? linear and Lagrange’s ? are employed for the autocorrelation analysis. The Lagrange’s interpolation method showed a good convergence characteristic.