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Review of Biomimetic Underwater Robots Using Smart Actuators
추원식,안성훈,이경태,송성혁,한민우,이장엽,김형수,김민수,박용재,조규진 한국정밀공학회 2012 International Journal of Precision Engineering and Vol.13 No.7
In this paper, biomimetic underwater robots built using smart actuators, e.g., a shape memory alloy (SMA), an ionic polymer metal composite (IPMC), lead zirconate titanate (PZT), or a hybrid SMA and IPMC actuator, are reviewed. The effects of underwater environment were also considered because smart actuators are often affected by their external environment. The characteristics of smart actuators are described based on their actuating conditions and motion types. Underwater robots are classified based on different swimming modes. We expanded our classification to non-fish creatures based on their swimming modes. The five swimming modes are body/caudal actuation oscillatory (BCA-O), body/caudal actuation undulatory (BCA-U), median/paired actuation oscillatory (MPA-O), median/paired actuation undulatory (MPAU),and jet propulsion (JET). The trends of biomimetic underwater robots were analyzed based on robot speed (body length per second, BL/s). For speed per body length, robots using an SMA as an actuator are faster than robots using an IPMC when considering a similar length or weight. Robots using a DC motor are longer while their speeds per body length are similar, which means that robots using smart actuators have an advantage of compactness. Finally, robots (using smart actuators or a motor) were compared with underwater animals according to their speed and different swimming modes. This review will help in setting guidelines for the development of future biomimetic underwater robots, especially those that use smart actuators.
Research Advancement of Green Technologies
추원식,안성훈,천두만 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
Recently, green technology has become an attraction to researchers in engineering, manufacturing, material science, chemicalengineering, environment science and energy areas. In this paper. Six keywords such as, energy saving, energy consumption, greenmanufacturing, waste reduction, green products, and sustainable manufacturing which were the research fields discussed in theInternational Symposium on Green Manufacturing and Applications (ISGMA) 2013 were chosen to see the trend and status of greentechnologies in research area. In the last two decades, the number of journal articles related to the research area of green technologyhas significantly increased. Engineering is the most widely discussed research area covering the green technology. Also journals fromfive major research areas in green technology were analyzed with 5-years H-index and the number of journal articles published inrecent 5 years.
추원식,안성훈,김민수,장기환,송지현,RODRIGUEHUGO,천두만,조영태,고승환,조규진,차석원,민상기,정성호,정해도,이춘만,추종남 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.3 No.2
Manufacturing paradigms have historically been shaped by social, economic, and technological aspect, including limitations and needs. Design for manufacturing (DFM) has been the main paradigm for last three decades since design is defined by the limitations of available manufacturing processes. Since reducing the time required for the development of new products has been one of the key issues for businesses, removing the gap between designers and manufacturers has been one of today’s main goals. Many methods were developed to reduce this gap including information and communication technologies (ICT). However, current issues have been shifting towards design-related issues such that researchers have been trying to make products desired by the customers rather than that which is cheaper to manufacture. In this article, hybrid manufacturing (HM) and the concept of smart factory are introduced as key technologies for the future paradigm of manufacturing: Manufacturing for Design (MFD). Issues related to the development of HM process and examples of HM process are explained, and the importance of smart factories for the implementation of MFD is shown. Finally, future trends of HM and smart factory are predicted at the end of this article.
초등학생을 위한 메타버스 활용 액션러닝 프로그램 개발: 마인크래프트 사례를 중심으로
추원식,김연진,박수홍 부산교육대학교 미래교육원 2024 초등교육연구 Vol.39 No.1
The purpose of this study is to develop an action learning program using metaverse to improve the creative problem-solving skills of elementary school students in non-face-to-face situations. Based on the derived design strategy, an action learning program using metaverse was developed according to the ADDIE model, and the effectiveness was verified by applying the developed metaverse action learning program to 16 sixth graders in elementary school. The program consists of three main parts: pre-program activities, program application activities, and post-program application activities. In order to verify the effectiveness of this program, the response sample t-test was conducted for the pre-post test, and it was found to be statistically significant in all areas of creative problem-solving ability, so this program helped students improve their creative problem-solving skills. In addition, program participants experienced collaboration and communication with team members in the process of creative manipulation of metaverse space, and were able to understand the good points of metaverse space.