• 한국산업융합학회 논문집
• /
• 제26권6_3호
• /
• pp.1279-1288
• /
• 2023

Recently, domestic leisure boats have been actively researching eco-friendly product development to enter the global market. Since the hulls of existing leisure boats are mainly made of fiber reinforced plastic (FRP) or aluminum, design techniques for securing structural safety by applying related materials have been mainly studied. In this study, an initial structural design safety assessment of a trimaran pontoon leisure boat with a modular hull structure and eco-friendly high-density polyethylene (HDPE) material was conducted, and sensitivity evaluation and optimization analysis for lightweight design were performed. The initial structural design safety assessment was carried out by creating a finite element analysis model and applying the loading conditions specified in the ship classification regulation to check whether the specified allowable stresses are satisfied. For the sensitivity evaluation, the influence of stress and weight of each hull structural member was evaluated using the orthogonal array design of experiments method, and an approximate model based on the response surface method was generated using the results of the design of experiments. The optimization analysis set the thickness of the hull structural members as the design variable and considered the optimal design formulation to minimize the weight while satisfying the allowable stress. The algorithm of the optimization analysis applied the Gradient-population Based Optimizer (GBO) to improve the accuracy of the optimal solution convergence while reducing the numerical cost. Through this study, the optimal design of a newly developed eco-friendly trimaran pontoon leisure boat with a weight reduction of 10% was presented.

• 한국재난정보학회 논문집
• /
• 제20권1호
• /
• pp.60-68
• /
• 2024

연구목적: 화학물질 취급, 사용 등의 플랜트 및 사업장 설계 시 국내 안전관리 관련 법령을 준수하여 설계가 이루어졌는지 자동으로 판단할 수 있는 체계를 마련하여 검토 시간의 단축과 정확성을 높이고자 한다. 연구방법: 화학물질 취급, 사용 사업장에 대한 안전 설계 기준을 조사하고, 조문을 의미단위로 구분하여 자동으로 설계오류를 판단할 수 있는 유형과 체계를 도출하였다. 연구결과: 건물 설계 시 수행하던 자동 설계 검토 방법을 화학물질 취급 사업장을 설계 시 요구되는 안전설계 사항을 Rule Checker 개발을 통해 검토할 수 있는 체계를 제안하였다. 법 적용 대상 여부의 확인 후 전처리를 통해 의미단위로 안전설계 Rule을 구분한다. 구분된 결과는 4가지 유형으로 분류할 수 있고, 특정 장치 및 설비에 대한 사양, 공간, 조건, 상황에 대한 부분과 안전성을 강화하기위한 특정 장치 및 설비에 대한 사항이 대표적인 유형으로 분석되었다. 각각의 안전설계 Rule에 대한 Diagram을 작성하고, 이를 Rule checker 프로그램을 통해 검토할 수 있도록 하는 체계를 제안한다.

• 한국산업융합학회 논문집
• /
• 제11권2호
• /
• pp.71-82
• /
• 2008

In this study, 3 dimensional non-linear race car vehicle model including Chassis, steering and suspension systems were modeled by using Multi-Body Dynamics Simulation Program, DADS 9.5(Dynamic Analysis and Design System),which was used in kinematic and dynamic analysis. A full race car vehicle dynamics model using DADS program was presented and analysis was carried out to estimate the handling characteristics that may be very useful to design a race car in early design stage. The simulation of vehicle handling behavior for step steering input was simulated and compared with different design parameters: torsional stiffness of the front and rear anti roll bars, the motion ratio of the front and rear suspension system, the location of the tie rod joint, in multibody dynamic model. Therefore this simulation model before race car construction in early design step will be helpful for race car designer to save time and limited budget.

• Journal of information and communication convergence engineering
• /
• 제16권3호
• /
• pp.142-147
• /
• 2018

We present a practical design algorithm for quantizers at nodes in distributed systems in which each local measurement is quantized without communication between nodes and transmitted to a fusion node that conducts estimation of the parameter of interest. The benefits of vector quantization (VQ) motivate us to incorporate the VQ strategy into our design and we propose a low-complexity design technique that seeks to assign vector codewords into sets such that each codeword in the sets should be closest to its associated local codeword. In doing so, we introduce new distance metrics to measure the distance between vector codewords and local ones and construct the sets of vector codewords at each node to minimize the average distance, resulting in an efficient and independent encoding of the vector codewords. Through extensive experiments, we show that the proposed algorithm can maintain comparable performance with a substantially reduced design complexity.

• 한국산업융합학회 논문집
• /
• 제24권5호
• /
• pp.531-536
• /
• 2021

As artificial intelligence technology advances, it is being applied to various application fields. Artificial intelligence is performing well in the field of image recognition and classification. Chip design specialized in this field is also actively being studied. Artificial intelligence-specific chips are designed to provide optimal performance for the applications. At the design task, memory component optimization is becoming an important issue. In this study, the optimal algorithm for the memory size exploration is presented, and the optimal memory size is becoming as a important factor in providing a proper design that meets the requirements of performance, cost, and power consumption.

• 한국산업융합학회 논문집
• /
• 제22권1호
• /
• pp.21-28
• /
• 2019

As the automated vehicle system evolves, electronic devices and control software installed in vehicles are increasing. Therefore, automated vehicle electrical and electronic system (E/E system) design for ensure system integration, software modularization, system reusability, and scalability at the design stage of the automated vehicle is actively studied. This paper introduces a design methodology for automated vehicle E/E systems that employs by using cyber-physical systems (CPS). An automated forklift system was designed to examine the effectiveness of the proposed methodology. This paper showed that the proposed CPS design methodology enables an effective development of automated E/E control systems. Compare to existing design methodologies, it provides higher reusability of individual modules and an easier way to integrate control system elements such as controllers, sensors, and actuators.

• 한국산업융합학회 논문집
• /
• 제24권3호
• /
• pp.307-313
• /
• 2021

In this study, the comparative analysis, among the design standard value of distribution power, the calculated value from the measurement data of strand and the empirical data of the distribution line itself, have been performed for the elastic coefficients and linear expansion coefficients of distribution line conductors. The empirical values of elastic coefficients were lower about 10.6%(892kgf/mm²) than those of the design standard value of the distribution power and there were a little difference between the empirical values of linear expansion coefficients and the design standard value of the distribution power. From the above results, it could be concluded that the empirical values of conductor characteristics should be used in the dip design and installation of distribution line.

• 한국융합학회논문지
• /
• 제10권2호
• /
• pp.133-139
• /
• 2019

송(宋)대 민남(?南)지역의 수출 도자기 융합현상 분석 중국 송(宋)나라 시대(960-1279) 민남(?南)에서 제작된 도자기는 필리핀, 태국 등 동남아시아지역을 비롯한 한국, 일본, 멀리는 아프리카까지 무역을 통해 수출되었다. 중국 역사에서 3대 해양무역의 제품인 도자기를 통해 국내를 비롯한 해외와 교역하면서 왕성하게 발전하였다. 민남의 청자가 세계적으로 알려진 것에는 당시 민남 지역만의 지리적, 문화적, 정치적, 경제적 특성들이 조화롭게 상호작용을 통해 융합된 결과이기도 하다. 이는 민남 도자기가 중국 도자기 역사상 유일한 융합의 가치를 세운 근본 원인이기도 하다. 또한, 이러한 민남 도자기는 특수한 문화적 융합의 형태와 산업 모델을 제시하였다. 이 연구에서는 민남에서 보이고 있는 다양한 융합현상을 지리적, 문화적, 정치적, 경제적 환경에서 발생한 민남 도자기의 특성을 통해 분석한다. 이를 통해 도자분야의 지속적 발전을 위한 새로운 패러다임으로서 환경적 영향에 의한 융합의 가능성을 전망해보고자 한다.

• 한국산업융합학회 논문집
• /
• 제10권3호
• /
• pp.143-147
• /
• 2007

In recents years, the statistical properties has become an important quantity for reliability based design of a component. The effects of the materials and test conditions for parameter estimation in residual strength degradation model are studied in carbon/epoxy laminate. It is shown that the correlation between the experimental results and the theoretical prediction on the fatigue life distribution using the life distribution convergence method is very reasonable.

• 한국통신학회:학술대회논문집
• /
• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
• /
• pp.470-470
• /
• 2006