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나유찬,조영진 국제문화기술진흥원 2022 The Journal of the Convergence on Culture Technolo Vol.8 No.3
비행 시뮬레이터는 조종사들이 다양한 상황에 능숙하게 대처하고 비행감을 느낄 수 있도록 해주는 장치로 현 대 항공 분야에서 과학화 훈련에 관한 관심이 증가함에 따라 항공 훈련기관에서는 시뮬레이터를 개발 및 운용하는 사례가 증가하고 있다. 이에 본 연구에서는 상용 비행 시뮬레이터 프로그램과 모션 프로그램을 활용하여 모션 기반 헬리콥터 시뮬레이터를 개발하는 과정에 관하여 기술하였다. 연구 과정에서 선행연구를 통하여 헬리콥터 비행교육의 특수성과 모션 시뮬레이터의 긍정적인 효과를 확인하였으며, 모의비행훈련장치에 대한 구성과 현행 규정을 파악하고 헬리콥터 모션 시뮬레이터를 개발하는 과정에서 모션 시스템의 설계와 프로그램에 관하여 연구하였다. 시뮬레이터의 시스템 설계와 구조설계를 바탕으로 모션 프로그램을 설정하고 비행 시뮬레이터로부터 수신되는 데이터를 식별하여 예상 작동 형상을 확인하였다. 우리는 본 연구를 통해 모션 기반 헬리콥터 시뮬레이터를 완성하여 조종사 훈련에 긍 정적인 기대효과를 마련하고자 한다. A flight simulator is a device that allows pilots attain proficiency of various situations and a sense of flight, and as interest in scientific training increases in modern aviation, aviation training organization develop and operate simulators. Therefore, in this study, the process of developing a motion-based helicopter simulation Training Device using a commercial program. Citing previous studies, the specificity of helicopter flight education and the positive effect of motion simulators were confirmed. In addition, the design and program of the motion device were studied in the process of checking the configuration and current regulations of flight simulation training devices and developing a helicopter motion simulator. A motion program was set based on the system design and structural design of the flight simulator, and data received from the flight simulator was identified to confirm the expected operating shape. Through this study, we intend to create a positive expected effect on pilot training by completing a motion-based helicopter simulator.
영상처리를 위한 적응적 알파 - 절사평균 필터에 관한 연구
나유찬 남서울대학교출판국 2011 남서울대학교 정보통신 논문집 Vol.8 No.1
Video segmentation is an essential part in region-based video coding and any other fields of the video processing. Among lots of methods proposed so far, the watershed method in which the region growing is performed for the gradient image can produce well-partitioned regions globally without any influence on local noise and extracts accurate boundaries. But, it generates a great number of small regions, which we call over segmentation problem. Therefore we proposes that adaptive α-trimmed mean filter for resolving the over segmentation of image.
나유찬 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.2
This thesis aims at the study of 9.6kbps modem development for wireless data communication(Mobitex network), which are designed for two way massage services by using the network of wireless packet. This modem has the features of GMSK demodulation by using Gaussian filter, which has the co-amplitude in a better condition and narrowness bandwidth and high performance in BER, compared with existing MSK modulation. In case of BT=0.3, we designed this receiver to reduce RF output power spectrum at received data of symbol demodulation and avoid inter-symbol interference(ISI) so that we can apply this modem to wireless data communication which are currently in service for wireless modem in china.
Adaptive trimmed mean 필터를 이용한 영상의 과분할 방지에 관한 연구
나유찬,송창영,박형근 남서울대학교 2003 남서울대학교 논문집 Vol.9 No.-
Video segmentation is an essential part in region-based video coding and any other fields of the video processing. Among lots of methods proposed so far, the watershed method in which the region growing is performed for the gradient image can produce well-partitioned regions globally witflout any influence on local noise and extracts accurate bowndanes. But, it generates a great number of small regions, which we call over segmentation problem. Therefore we proposes that adaptive trimmed mean filter for resolving the over segmentation of image.
정보통신기술의 발달이 화물유통량에 미치는 효과에 관한 연구
나유찬 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.2
As logistics activities of Seoul Metropolitan area expands to include even Southern Kyounki and Northern Chungnam Province, the understanding of cargo flow become increasingly important. previous research in traffic flow measured cargo flow only from the perspective of the national level, not specific region such as Metropolitan area. This trend resulted in logistics decisions that help to facilitate national level planning but do not always provide necessary information for regional level. Therefore, the purpose of this paper is to present an analysis of traffic flow of Seoul-Kyungki Metropolitan area in the IT logistics era.
나유찬 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.2
In this study, we proposed polarization characteristics of the GACC filter obtained using the TE and TM mode coupler which has a different grating periods and duty ratio. We found that GACC has It's inherent limit on SSR due to its abrupt onset of the grating perturbation. With suitable tapering of the coupling strength by varying the grating duty ratio, we expected that SSR could be drastically improved. As a result, the theoretical side-lobe suppression ratios (SSRs) for single and double stage uriform type GACC optical filters are approximately -9dB and -18dB, respectively.
헬리콥터 비행교육 과정에서 비행훈련과 모의비행훈련의 상관관계 분석
나유찬,조영진 한국항공운항학회 2022 한국항공운항학회지 Vol.30 No.2
As the demand for simulated flight training and interest in new technology training increase, this study analyzed the performance of flight simulator training and actual flight training subjects to confirm efficient flight simulator training curriculum. Summarizing the results of the study, found that flight simulator training had a significant positive effect on the actual flight training performance and in particular had a relatively large effect on the air maneuver, traffic pattern, cross country flight subjects. As a result of analyzing theoretical major classes that affect flight simulator training to verify the correlation, found that principle of air navigation, air traffic service, and helicopter flight theory were affected in order. The significance of this study was to identify the curriculum and ground lesson that should be focused on effectively performing flight simulator training in the helicopter private pilot course.