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RISS 인기검색어
- 검색키워드
- 저자 : 서일성(Il-Seong Seo) (검색결과 3 건)
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허건수,조병희,서문석,서일성,박동창,Heo, Geon-Su,Jo, Byeong-Hui,Seo, Mun-Seok,Seo, Il-Seong,Park, Dong-Chang 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.6
The track tension is closely related to the maneuverability of tracked vehicles and the durability of tracks and suspension systems. In order to minimize the excessive load on the tracks and to pre vent the peal-off of tracks from the road wheels, it is required to maintain the optimum track tension throughout the maneuver. However, the track tension cannot be easily measured due to the limitation in the sensor technology, harsh environment, etc. In this paper an indirect track tension monitoring system is developed based on idler assembly models, a geometric relation around the idler, and the tractive force estimated by using the Extended Kalman Filter. The performance of the tension monitoring system is verified with the results obtained from the Multi-Body Dynamics model.
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허건수,홍대건,서문석,서일성,Heo, Geon-Su,Hong, Dae-Geon,Seo, Mun-Seok,Seo, Il-Seong 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.10
In this paper, track tension estimation methods are developed for tracked vehicles which are subject to various maneuvering tasks such as longitudinal driving on sloping and/or rough roads. The information of the track tension is very important for the tracked vehicles because the track tension is closely related to the maneuverability and the durability of the tracked vehicles. A modified 3 DOF dynamics model is derived for the tracked vehicles and is utilized for estimating the tractive force and track tension for the longitudinal driving case. The tension estimation performance of the proposed methods is verified through the simulation of the Multi-body Dynamics tool. The simulation results demonstrate the effectiveness of the proposed method under various maneuvering tasks of the tracked vehicles.
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김상근(Sang-Keun Kim),이기태(Gi-Tae Lee),서일성(Il-Seong Seo) 한국전자파학회 2011 한국전자파학회논문지 Vol.22 No.12
본 논문에서는 단위-셀 EM 시뮬레이션 기법을 통해 주파수 선택적 전파투과막(FSS: Frequency Selective Surface)을 갖는 AEM(Advanced Enclosed Mast) 레이돔을 설계하고, 16×16 배열안테나 방사 패턴 시험을 통해 레이돔의 성능을 검증하였다. 측정한 결과, 평면파 입사 조건을 가정한 시뮬레이션 결과와 원전계 및 근전계 조건에 레이돔을 두고 시험한 결과가 서로 잘 일치하는 결과를 확인하였다. 이 결과들을 통해 검증된 AEM형 FSS 레이돔을 활용하여 기존 마스트 대비 안테나의 RCS를 줄이는 것이 가능할 것이다. In this paper, we present a design of AEM radome with frequency selective surface using unit-cell EM simulation method and verified the performance of AEM radome by the radiation pattern measurements of 16×16 array-antenna. Measured results under near-field condition showed a good agreement with the simulation and far-field measured ones. And there were no radiation pattern variation between antenna only and antenna with AEM radome. From these results, we verified that AEM radome with frequency selective surface can be a solution to reduce the RCS of conventional mast and radar.
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