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OPUS Suite를 이용한 RAM-C 분석도구의 검증
김한솔(Hansol Kim),허장욱(Jangwook Hur) 한국신뢰성학회 2020 신뢰성응용연구 Vol.20 No.1
Purpose: Markov Process Simulator (MPS) is a RAM-C analysis program. its optimal design alternative decision, which is achieved by analyzing the effect of RAM parameters on the life cycle cost using the Markov-Monte Carlo technique, needs to be verified. Methods: The OPUS Suite of Systecon, an advanced program used by defense companies to verify the program, is used to model the communication and identification system of helicopters as well as to calculate the failure number, operation availability and life cycle cost among the output values of the MPS and OPUS Suite. Results: When comparing the results of the MPS and OPUS Suite, the number of failures was less than one, the error of operation availability was 1.6%, and the life cycle cost error was 3.9%. Conclusion: The results of the MPS analysis showed a very small error compared to the results of the OPUS Suite, which is widely used in the defense field of major developed countries as well as Korea and verified the validity of the MPS.
김한솔(Han-Sol Kim),황현석(Hyun-Seok Whang),김갑순(Gab-Soon Kim) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.5
In this paper, we designed a camera focus adjustment system for a workpiece inspection system. It is possible to adjust the center line of the camera vertically to the top of the horizontal illuminator and the top of the vertical illuminator, respectively, and to take the same size of object in the picture. The workpiece inspection system consisted of a body, a vertical camera focus adjustment mechanism, a horizontal camera focus adjustment mechanism, a horizontal illumination device, a vertical illumination device, and a control device. To adjust the size of the workpiece, an image of a checker board attached to the horizontal illumination device of the inspection apparatus and the vertical illumination device is acquired, calibration is performed to remove image distortion of the workpiece is measured by image processing. As a result of the characteristic test, each linear motion mechanism can be adjusted until workpiece reaches a predetermined size. Since the workpiece inspection apparatus can acquire images with a predetermined size, it is considered that the accuracy of measuring the size of the workpiece can be improved by image processing.
김한솔(Han-Sol Kim),김갑순(Gab-Soon Kim) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.7
We describe the design and fabrication of a two-axis force/torque sensor with parallel-plate beams (PPBs) and single beams for measuring force and torque in hip-joint rehabilitation exercise using a lower rehabilitation robot. The two-axis force/torque sensor is composed of an Fz force sensor and a Tz torque sensor, which detect z direction force and z direction torque, respectively. The two-axis force/torque sensor was designed using the FEM (Finite Element Method) and manufactured using strain gages. The characteristics experiment of the two-axis force/torque sensor was carried out. The test results show that the interference error of the two-axis force/torque sensor was less than 0.64% and the repeatability error and the non-linearity of the two-axis force/torque sensor were less than 0.03%. It is thought that the developed two-axis force/torque sensor could be used for a lower rehabilitation robot.
김한솔(H. S. Kim),양성규(S. K. Yang),오태규(T. K. Oh),박문도(M. D. Park),김명묵(M. M. Kim),김갑순(G. S. Kim) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
본 논문에서는 다양한 종류의 CNC 선반을 위한 공작물 적재 장치의 제어장치를 설계하였다. CNC 선반은 자동차 부품, 항공기 부품, 선박 부품 등 각종 부품을 가공하는데 사용되는 기계장치이다. CNC 선반의 대부분은 척에 가공전의 원자재를 넣어주면 자동으로 최종 부품까지 가공한다. 가공 전 원자재와 가공 후 공작물을 CNC 선반에 장착하고 탈착하는 것은 작업자가 수행하는 경우도 있고, 겐츄리 로봇, 산업용 로봇, 스카라 로봇 등이 수행하는 경우도 있다. 로봇들이 수행하는 경우에는 가공 전의 원자재를 적재하는 자동 적재 장치와 가공 후의 공작물을 적재하는 자동 적재 장치가 필요하다. 또한 고속화, 고능률화, 복합화, 다기능화, 시스템화를 추구하면서 이에 대응할 수 있는 주변장치의 요구가 많아지고 있고, 이를 위해 기존의 시스템과는 달리 원자재와 가공품의 크기에 맞춰 조절이 가능한 자동 적재 장치가 필요하다. CNC 선반을 위한 적재 장치의 제어장치는 TMS320F28377D 를 주연산장치로 사용하였고, 공작물 및 원자재 위치 감지 센서, 공작물 및 원자재가 올라가는 Table 의 위치를 감지하는 위치 감지 센서, 원판과 Lifter 의 결합을 감지하는 고정핀 감지 센서, 원판의 높이를 감지하는 Lifter 센서, 레버 및 스위치의 입력을 받기 위한 입력부와 Lifter 모터, Table 모터, 고정핀, 에어 컴프레셔의 제어를 위한 출력부, 5 축 로봇 제어장치와 통신을 위한 CAN 통신부로 구성하였다. 적재 장치의 제어장치를 설계 및 제작하였고, 제어를 위한 알고리즘을 개발하여 프로그램을 작성하였다.
응고 대체제로서 깔라만시 원액의 첨가가 리코타 치즈에 미치는 영향
김한솔(Han-Sol Kim),박세림(Se-Rim Park),김정민(Jeong-Min Kim),박신영(Sin-Young Park),김학연(Hack-Youn Kim) 한국축산식품학회 2020 Food and Life Vol.2020 No.2
This study aim to investigate the quality characteristics and antioxidant activity of Ricotta cheese added with Citrus mircocarpa concentrated solution (CCS) as coagulation agent replacement (C2: citric acid 3%, CCS 2%; C3: citric acid 2%, CCS 3%). The quality characteristics include the moisture content, protein content, color, pH, water holding capacity (WHC), viscosity and sensory evaluation. The antioxidant activity experiments include the DPPH scavenging activity and ferric reducing antioxidant power assay (FRAP). The moisture content of C2 and C3 treatment were significantly lower than the control (p <0.05). The protein content of Ricotta cheese was significantly increased with an increasing CCS (p<0.05). The pH of C3 treatment was significantly lower than the other treatments (p<0.05), whereas the viscosity was higher than the other treatments. The DPPH scavenging activity of CCS treated samples were significantly higher than the control (p<0.05). The FRAP of C3 treatment was significantly higher than the other treatments (p <0.05). Among the sensory properties of color, flavor, off-flavor, and overall acceptability traits of C3 was significantly the highest value (p<0.05). These results showed that the citric acid 2% and CCS 3% (C3) treatment was improved the quality characteristics and antioxidant activity of Ricotta cheese. Therefore, citric acid 2% and CCS 3% were suitable as coagulation agent replacement for Ricotta cheese.
적산온도 기반 콘크리트의 압축강도 예측을 위한 무선 아두이노 센서 시스템 개발에 관한 기초 연구
김한솔 ( Kim Han-sol ),문동환 ( Moon Dong-hwan ),이한승 ( Lee Han-seung ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.1
The mechanical and durability characteristics of concrete structures depend on the construction environment, material conditions, design conditions, and temperature and humidity environment after casting. However, wired communicati-on sensors which are mainly used in the field have many limitations in their usability and monitoring. In this study, all temperature and humidity data measured from embedded sensors are monitored via a wireless sensor network. Based on the measured temperature data, the predicted compressive strength of the concrete was compared with the actual compressive strength. As a result, The error between predicted strength and experimental strength has decreased over time.