SystemC 구성요소를 이용한 SystemVerilog 기반 검증환경

오영진,송기용,Oh, Young-Jin,Song, Gi-Yong 한국융합신호처리학회 2011 융합신호처리학회 논문지 (JISPS) Vol.12 No.4

시스템의 복잡도가 증가함에 따라 상위수준 추상화에 기반한 시스템수준 설계 및 하드웨어의 기능적 검증을 위한 방법론의 중요성이 부각되고 있으며, Verilog HDL(Hardware Description Language)에 하드웨어 검증기능이 추가된 SystemVerilog를 이용하는 시스템수준의 기능적 검증방법이 각광받고 있다. SystemVerilog는 Verilog HDL의 확장된 형태로 하드웨어 설계언어와 검증언어의 특징을 모두 포함하나, 다중상속을 허용하지 않는다. 본 논문에서는 SystemVerilog 기반의 검증환경과 다중상속을 허용하는 SystemC 의 구성요소를 SystemVerilog DPI(Direct Programming Interface) 및 ModelSim macro를 이용해 결합한 다중상속이 가능한 검증환경을 구성한다. 다중상속이 허용된 검증환경 시스템은 특정부분을 수정 후 재실행으로 DUT(Design Under Test)의 기능 검증을 쉽게 수행할 수 있으며, OOP(Object Oriented programming) 기법을 이용한 코드의 재사용성이 높아 또 다른 DUT의 동작 검증에 재사용할 수 있다. As a system becomes more complex, a design relies more heavily on a methodology based on high-level abstraction and functional verification. SystemVerilog includes characteristics of hardware design language and verification language in the form of extensions to the Verilog HDL. However, the OOP of System Veri log does not allow multiple inheritance. In this paper, we propose adoption of SystemC to introduce multiple inheritance. After being created, a SystemC unit is combined with a SystemVerilog-based verification environment using SystemVerilog DPI and ModelSim macro. Employing multiple inheritance of SystemC makes a design of a verification environment simple and easy through source code reuse. Moreover, a verification environment including SysemC unit has a benefit of reconfigurability due to OOP.

원전 2차측 배관 감육여부 판별을 위한 Total Point Method 전산 알고리즘 개발

오영진,윤훈,문승재,한경희,박병욱,Oh, Young Jin,Yun, Hun,Moon, Seung Jae,Han, Kyunghee,Park, Byeong Uk 한국압력기기공학회 2015 한국압력기기공학회 논문집 Vol.11 No.2

Pipe wall-thinning by flow-accelerated corrosion (FAC) and various types of erosion is a significant and costly damage phenomenon in secondary piping systems of nuclear power plants (NPPs). Most NPPs have management programs to ensure pipe integrity due to wall-thinning that includes periodic measurements for pipe wall thicknesses using ultrasonic tests (UTs). Nevertheless, thinning evaluations are not easy because the amount of thickness reduction being measured is often quite small compared to the accuracy of the inspection technique. U.S. Electric Power Research Institute (EPRI) had proposed Total Point Method (TPM) as a thinning occurrence evaluation method, which is a very useful method for detecting locally thinned pipes or fittings. However, evaluation engineers have to discern manually the measurement data because there are no numerical algorithm for TPM. In this study, numerical algorithms were developed based on non-parametric and parametric statistical method.

수평유지장치의 $H{\infty}$ 제어

오영진,서영수,Oh, Young-Jin,Suh, Young-Soo 대한전기학회 2003 전기학회논문지 D Vol.52 No.2

This paper is concerned with level control of a upper plate in a vehicle. The objective of control is to maintain the upper plate at level regardless of road slopes. The road slope is detected using an accelerometer-type inclinometer and H infinity control method is used to simultaneously reduce effects of road slopes and sensor noises. By the simulation, it is shown that the upper plate is successfully maintained at level.

청보리 신품종 '미호'의 생육특성과 수량성

오영진,박태일,박형호,한옥규,송태화,박종철,김양길,박종호,강현중,강천식,정영근,김경호,김보경,윤건식,홍기흥,배정숙,이성태,Oh, Young-Jin,Park, Tae-Il,Park, Hyoung-Ho,Han, Ouk-Kyu,Song, Tae-Hwa,Park, Jong-Chul,Kim, Yang-Kil,Park, Jong-Ho,Kang, Hyeon-Jung,K 한국초지조사료학회 2016 한국초지조사료학회지 Vol.36 No.4

청보리 신품종 '미호'는 까락에 거치가 적은 반매끈망으로 부드럽고 엽신비율이 높으며, 내한성에 강하고 경수가 많은 다얼성으로 총체 건물수량이 높은 품종이다. 이 품종은 2001년에 'SB00T2040'을 모본으로 하고, 'SB941003'을 부본으로 인공교배하여 육성선발된 '익산 473호'를 2012년 부터 2014년까지 전국 6개소에서 지역적응시험을 거쳐 2014년에 육성되었다. '미호'는 직립초형이고 파성이 III 정도이며, 잎은 녹색이고 옆폭은 중간 정도이다. 엽이에는 색소 침착이 없고, 까락특성은 거치가 적은 반매끈망이다. 초장은 96 cm로 장간 품종에 속하고, $m^2$당 경수는 650개로서 '영양'의 593개 보다 57개가 많은 다얼성이다. 출수기는 전작에서 4월 28일, 답리작에서는 4월 27일로 표준품종인 '영양'보리와 같았고, 황숙기는 전작에서 6월 1일로 '영양'보다 1일 늦었고, 답리작에서도 5월 29일로 1일 늦었다. '미호'는 영양보다 내한성이 강하였고, 흰가루병에는 감수성을 나타내었지만 보리호위축병은 익산(III)에서 중도저항성, 나주(I), 진주(IV)에서는 저항성을 보였다. 건물수량은 전작에서 평균 13.1톤/ha, 답리작에서 평균 12.1톤/ha으로 '영양'에 비하여 각각 9%, 2% 증수하였다. 조사료 품질은 조단백질 함량은 6.8%로 '영양'에 비해 낮았고, ADF와 NDF 함량은 각각 27.1%, 49.4%로 '영양'에 비해 다소 높았으나, TDN 수량은 8.3톤/ha로 '영양'보리와 대등하였다. 사일리지 품질은 2등급으로 양호한 발효양상을 보였다. The purpose of development new variety 'Miho' (Hordeum vulgare L.) is a favorite with livestock feed and develop varieties resistant to disease and lodging. 'Miho' was carrying out the growth habit of group III with green and mid-wide leaf. Awn that is related to preference of livestock is a semi-smooth awn. This cultivar had 96 cm of culm length, 650 of spikes $per\;m^2$. Heading date of 'Miho' was April 27, and maturing date on May 30, which were later than cultivar 'Youngyang'. It also showed strong winter hardiness, and similar resistance to shattering and bariy yellow mosaic virus (BaYMV) compared with those of check one. The best thing among the traits of a good quality with the plant green at the latter growing period. The average forage dry matter yield in the regional yield trial was about 13.1, 12.1 MT per ha in upland and paddy field, respectively, which were 9%, 2% higher than that of the check cultivar. It's also showed 6.8% crude protein, 27.1% ADF (acid detergent fiber), and 67.5% TDN (total digestible nutrients), including higher silage quality for whole crop barley. This cultivar would be suitable for the area whose average minimum temperature was above $-8^{\circ}C$ January in Korean peninsula.

계층화된 테스트벤치를 이용한 검증 환경 구현

오영진,송기용,Oh, Young-Jin,Song, Gi-Yong 한국융합신호처리학회 2011 융합신호처리학회 논문지 (JISPS) Vol.12 No.2

최근 시스템의 규모가 커지고 복잡해지면서, 시스템 수준에서의 기능 검증방법론이 중요해지고 있다. 기능블록의 검증을 위해서는 주로 BFM(bus functional model)이 사용되며, 기능 검증에 대한 부담이 증가할수록 올바른 검증환경 구성의 중요성은 더욱 증가한다. SystemVerilog는 Verilog HDL의 확장으로 하드웨어 설계언어의 특징과 검증언어의 특징을 동시에 갖는다. 동일한 언어로 설계기술, 기능 시뮬레이션 그리고 검증을 진행할 수 있다는 것은 시스템개발에서 큰 이점을 갖는다. 본 논문에서는 SystemVerilog를 이용하여 AMBA 버스와 기능블록으로 구성된 DUT를 설계하고, 계층적 테스트벤치를 이용한 검증환경에서 DUT의 가능을 검증한다. 기능 블록은 Adaptive FIR 필터와 Booth's 곱셈기를 사용한다. 이를 통하여 검증환경이 DUT와 연결되는 인터페이스의 부분적인 변경을 통하여 다른 하드웨어의 기능을 검증하는데 재사용되는 이점을 가지고 있음을 확인한다. Recently, as the design of a system gets larger and more complex, functional verification method based on system-level becomes more important. The verification of a functional block mainly uses BFM(bus functional model). The larger the burden on functional verification is, the more the importance of configuring a proper verification environment increases rapidly. SystemVerilog unifies hardware design languages and verification languages in the form of extensions to the Veri log HDL. The processing of design description, function simulation and verification using same language has many advantages in system development. In this paper, we design DUT that is composed of AMBA bus and function blocks using SystemVerilog and verify the function of DUT in verification environment using layered testbench. Adaptive FIR filter and Booth's multiplier are chosen as function blocks. We confirm that verification environment can be reused through a minor adaptation of interface to verify functions of other DUT.

PGSFR BOP계통 배관 응력평가 적용방안 고찰

오영진,허남수,장영식,Oh, Young Jin,Huh, Nam Su,Chang, Young Sik 한국압력기기공학회 2016 한국압력기기공학회 논문집 Vol.12 No.1

NSSS (Nuclear Steam Supply System) and BOP (Balance of Plant) design works for PGSFR (Prototype Gen-IV Sodium Fast Reactor) have been conducted in Korea. NSSS major components, e.g. reactor vessel, steam generator and secondary sodium main pipes, are designed according to the rule of ASME boiler and pressure vessel code division 5, in which DBA (Design by Analysis) methods are used in the stress assessments. However, there is little discussions about detail rules for BOP piping design. In this paper, the detail methodologies of BOP piping stress assessment are discussed including safety systems and non-safety system pipings. It is confirmed that KEPIC MGE(ASME B31.1) and ASME BPV code division 5 HCB-3600 can be used in stress assessments of non-safety pipes and class B pipes, respectively. However, class A pipe design according to ASME BPV code division 5 HBB-3200 has many difficulties applying to PGSFR BOP design. Finally, future development plan for class A pipe stress assessment method is proposed in this paper.

원자력발전소 적용 고밀도 폴리에틸렌 배관의 맞대기 융착절차 및 검증절차 분석

오영진,박흥배,신호상,Oh, Young-Jin,Park, Heung-Bae,Shin, Ho-Sang 대한용접접합학회 2013 대한용접·접합학회지 Vol.31 No.6

In nuclear power plants, lined carbon steel pipes or PCCPs (pre-stressed concrete cylinder pipes) have been widely used for sea water transport systems. However, de-bonding of linings and oxidation of PCCP could make problems in aged NPPs (nuclear power plants). Recently at several NPPs in the United States, the PCCPs or lined carbon steel pipes of the sea water or raw water system have been replaced with HDPE (high density polyethylene) pipes, which have outstanding resistance to oxidation and seismic loading. ASME B&PV Code committee developed Code Case N-755, which describes rules for the construction of buried Safety Class 3 polyethylene pressure piping systems. Although US NRC permitted HDPE materials for Class 3 buried piping, their permission was limited to only 10-year operation because of several concerns including the quality of fusion zone of HDPE. In this study, various requirements for fusion qualification test of HDPE and some regulatory issues raised during HDPE application review in foreign NPPs are introduced.

비접촉 구동용 마그네트 기어 토크 특성 해석

오영진(Young-Jin Oh),하경호(Kyung-Ho Ha),홍정표(Jung-Pyo Hong),오영진(Young-Jin Oh) 대한전기학회 2001 대한전기학회 학술대회 논문집 Vol.2001 No.7

중수형 원전 압력관 지연수소균열 평가를 위한 압연연결부 표면 잔류응력 해석

오영진(Young-Jin Oh),안성호(Sung-Ho Ahn),장용훈(Yong-Hun Jang),김종성(Jong-Sung Kim),진태은(Tae-Eun Jin) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5

Nuclear reactor of the CANDU nuclear power plant is composed of hundreds pressure tubes, which are pressure boundary of primary reactor coolant and connected to endfittings at each ends by rolled joint. The pressure tube material, Zr-2.5Nb alloy is known as susceptible material for Delayed Hydride Cracking(DRC), which is affected by hydrogen (and deutrium) concentration on the material and stress concentration by nominal stress and any kind of flaw that can be made during manufacturing or operating process. According to the Canadian experience for CANDU operation, the rolled joint region is one of most susceptible region for DRC because of higher hydrogen concentration and higher residual stress compared with the main body region of pressure tube. In this study, surface residual stress distributions in pressure tube rolled joint region are analyzed for several rolling variables using Finite Element (FE) method. Additionally, effects of residual stress on DRC initiation are evaluated.

3차원 입체 디스플레이의 고스팅 효과로 인한 밝기 왜곡 정도 측정

오영진(Young Jin Oh),유민준(Min-Joon Yoo),이인권(In-Kwon Lee) 한국정보과학회 2013 한국정보과학회 학술발표논문집 Vol.2013 No.6