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Tracking Algorithm Based on Moving Slide Window for Manuevering Target
Jinho Bae(배진호),Chong Hyun Lee(이종현),Hyoung-Goo Jeon(전형구) 대한전자공학회 2016 전자공학회논문지 Vol.53 No.4
본 논문에서는 이동 창 함수 추적기라는 새로운 추적 알고리즘을 제안한다. 본 논문에서는 이동표적의 궤적을 효율적으로 추정하기 위해 과거 궤적의 정보를 포함하는 이동 구간이 선형이라는 가정을 한 선형 창 함수를 적용하여 구현한다. 제안된 알고리즘의 창 함수의 파라메터는 측정 잡음의 영향을 줄이기 위해 그리고 알파-베터 추적기와 비교하여 더 적은 계산량 증가로 빠른 이동 표적 추적을 구현하기 위해 적절하게 선택할 수 있다. 본 논문에서 제안한 창 함수 추적기를 검증하기 위해 잡음상황에서 선형과 비선형 궤적에 대한 컴퓨터 모의실험을 수행했다. 또한 제안된 창 함수 추적기는 초기값에 대한 둔감한 특성과 예측할 수 없는 시변 측정 환경에서 창 함수 추적기를 사용할 경우 더 높은 자유도를 가짐을 보였다. In this paper, we propose a novel tracking algorithm called slide window tracker (SWT) suitable for maneuvering target. To efficiently estimate trajectory of moving target, we adopt a sliding piecewise linear window which includes past trace information. By adjusting the window parameters, the proposed algorithm is to reduce measurement noise and to track fast maneuvering target with little computational increment as compared to α-β tracker. Throughout the computer simulations, we verify outstanding tracking performance of the SWT algorithm in noisy linear and nonlinear trajectories. Also, we show that the SWT algorithm is not sensitive to initial model parameter selection, which gives large degree of freedom in applying the SWT algorithm to unknown time-varying measurement environments.
Bae, Jinho,Kobayashi, Nobuhiko P IOP 2019 Semiconductor science and technology Vol.34 No.2
<P>As a solution to future non-volatile random access memories (NV-RAMs) with large scale integration, many researchers are studying a crossbar array built with many resistive switching cells because of its simple architecture and scalability. However, a sneak current in the crossbar array that energizes memory cells not explicitly selected, raises various issues that need to be addressed for commercialization. Hence, we clearly describe the dominant causes and considerations for a passive crossbar array based on memristors. We discover that such resistive switches under reverse bias along the sneak current paths can play an important role to minimize the overall sneak current by blocking their reverse current. To develop commercializable passive crossbar resistive switching arrays, we demonstrate a read error bound and propose a new design parameter (R<SUB>RL</SUB>/R<SUB>FL</SUB> as ratio of reverse low resistance state and forward low resistance state) using the switching resistances on the forward and reverse current paths.</P>
Design and structural analysis of ITER upending tool for sector sub-assembly
Bae, Jinho,Ha, Min-Su,Nam, Kyoungo,Chung, Sikun,Park, Soo-Hyeon,Chung, Wooho,Moon, Jaewhan,Lee, Hyunsoon Elsevier 2017 Fusion engineering and design Vol.123 No.-
<P><B>Abstract</B></P> <P>The purpose of the upending tool (UT) is upending the vacuum vessel (VV) 40-degree sectors and the toroidal field coils (TFC) from the horizontal delivery orientations to the vertical assembly orientations. According to ITER assembly procedure, this upending operation is carried out by four hooks of the tokamak crane. VV or TFC upended by UT is transferred to sector sub-assembly tool (SSAT) for sector sub-assembly. For this reason, UT is classified as a lifting accessory in the ITER load specification.</P> <P>This paper describes UT design and upending sequence by two cranes with target components (VV and TFC) and presents the analysis results performed for the final design to verify the structural integrity of UT. The analysis cases for this verification are composed of the horizontal and vertical supporting on the floor and lifting. The simplified FE models for the lifted components (VV and TFC) that are provided from ITER Organization Central Team (IOCT) are used for this structural analysis.</P>