• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.249-250
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• 2006

In this paper, hardware design and implementation of digital controller for the High Precision Digital Power Supply (HPDPS) based on Digital Signal Processor (DSP) and Field Programmable Gate Array (FPGA) is presented. Developed digital controller is composed of high resolution Digital Pulse Width Modulation (DPWM) and high resolution analog to digital converter circuit with anti-aliasing filter. And Digital Signal Processor (DSP) has the capability of a few micro-second calculation time for one feedback loop. 32-bit DSP and DPWM with 150[ps] step resolution is used to implement the HPDPS. Also 18-bit 2 mega sample per second ADC board is adopted for the developed digital controller. Also, hardware structure of the developed digital controller and experimental results of the first prototype board for HPDPS is described.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.363-366
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• 2004

KAERI is developing the Advanced Spent Fuel Conditioning Process (ACP) as a pre-disposal treatment process for spent fuel. In this process, the management process must operate in intense radiation fields as well as in a high temperature. Therefore, remote maintenance has played a significant role in this process. Hence suitable remote handling and maintenance technology needs to be developed along with the design of the process concepts. To do this, we developed the digital mockup for the ACP. The digital mockup provides the capability of verifying the remote operability of the process without fabrication of the process equipment. In other words, by applying virtual reality to the remote maintenance operation, a remote operation task can be simulated in the digital mockup. Through utilizing this graphic simulation in this digital mockup, general guidelines can be established for designing equipment intended for remote handling and maintenance. Also, the designer of the equipment that must be remotely maintained should ensure that there is adequate access to the process equipment. The graphic simulator will substantially reduce the cost of the develo363pment of the remote handling and maintenance procedure as well as the process equipment.

• 벤처혁신연구
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• 제7권3호
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• pp.1-23
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• 2024

본 연구는 여객자동차운송사업에서 디지털 트랜스포메이션(Digital Transformation) 도입 시 수용 의도에 영향을 미치는 요인을 실증적으로 분석하고, 기업 민첩성의 조절 효과를 검토하였다. 연구는 기술수용모형(TAM)과 기술-조직-환경(TOE) 모형을 바탕으로 도입 유용성, 도입 용이성, 디지털 전환 역량, 최고경영자 지원, 고객 요구, 경쟁 압력을 독립 변수로 설정하였고, 기업 민첩성을 조절 변수로 설정해 316개의 유효 표본을 분석하였다. 분석 결과, 도입 용이성, 디지털 전환 역량, 최고경영자 지원, 고객 요구, 경쟁 압력은 모두 디지털 트랜스포메이션 수용 의도에 유의미한 영향을 미쳤으며, 특히 디지털 전환 역량이 가장 큰 영향을 미쳤다. 이는 기업이 디지털 기술을 효과적으로 활용하는 능력이 디지털 트랜스포메이션 성공의 필수 요소임을 시사한다. 반면, 도입 유용성은 수용 의도에 유의한 영향을 미치지 않았는데, 이는 디지털 트랜스포메이션 도입 시 비용과 리스크에 대한 우려가 더 큰 영향을 미칠 수 있음을 의미한다. 또한, 기업 민첩성은 수용 의도와 독립 변수 간의 관계에서 긍정적인 조절 효과를 나타냈으며, 민첩한 기업일수록 디지털 트랜스포메이션 도입 과정에서 발생하는 도전 과제를 효과적으로 해결할 수 있음을 보여주었다. 특히, 기업 민첩성이 높을 경우 도입 유용성의 영향이 긍정적으로 변화하는 것으로 나타났다. 본 연구는 여객자동차운송사업에서 디지털 트랜스포메이션을 체계적으로 분석한 첫 시도로서 학문적 의의가 크며, 실무적으로는 디지털 전환 역량과 최고경영자 지원의 중요성을 확인했다. 다만, 연구 범위가 여객자동차운송사업에 한정되어 일반화에 한계가 있으므로, 향후 다양한 업종과 분야로 확대된 연구가 필요하다.

• 기술혁신연구
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• 제12권3호
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• pp.205-227
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• 2004

This paper examined the leapfrogging of Korean Digital TV Industry in the midst of digital Revolution. Despite the lack of sufficient capability and core knowledge base, the Korean firms succeeded in the catching up forerunner firms in the Digital TV industry. The reasons of the success of Korean firms were as follows. Firstly, the Korean firms had some complementary asset, such as the experience of producing analog TV, and were able to develop the prototype digital TV given the accesses to the foreign knowledge via overseas R&D posts and acquisition of a foreign company. Secondly, the Korean firms were not locked in the analog technologies. As a follower, they had little sunk cost on the existing analog technologies. Thirdly, New mode of innovation, such as National R&D program for the development of HDTV and ASIC, were used as a tool for the mobilization of scarce knowledge base of digital technologies and the sharing the risks of development of path-breaking new technologies.

• 디지털융복합연구
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• 제7권4호
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• pp.117-125
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• 2009

Information and computer technology(ICT) readiness in SME(small and medium enterprises) in globalized digital world get much attention due to its capability to reach broader customers and to personalized the products to the clients. The purpose of this study is to compare the readiness of ICT capabilities in SME between Korean firms operated in Qingdao China and Incheon, South Korea. The results of the study are presented and the implication of this comparative research is discussed. It is hoped that the finding of the research would be beneficial to academian and practitioners in China and South Korea.

• 한국CDE학회논문집
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• 제21권1호
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• pp.9-19
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• 2016

Applying human engineering simulation to analyzing work capability and movements of operators during manufacturing is highly demanded. However, difficulty in modeling digital human required for simulation makes engineers to be reluctant to utilize human simulation for their tasks. This paper addresses such problem on human engineering simulation by developing the technology to automatize human modeling with multiple Kinects at different depths. The Kinects enable us to acquire the movements of digital human which are essential data for implementing human engineering simulation. In this paper, we present a system for modeling automation of digital human. Especially, the system provides a way of generating the digital model of workers' movement and position using multiple Kinects which cannot be generated by single Kinect. Lastly, we verify the effects of the developed system in terms of modeling time and accuracy by applying the system to four different scenarios. In conclusion, the proposed system makes it possible to generate the digital human model easily and reduce costs and time for human engineering simulation.

• 한국실내디자인학회논문집
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• 제13권4호
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• pp.188-195
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• 2004

The evolutions of human mental capability and technology opened a new era called "Digital Space." Moreover, Digital Space as technology is already accelerating the process of "self-expansion." The expansion, on the foundation of its conceptual and morphological variety, acquired the potential to furnish various types of spatiotemporal experience. This phenomenon, as a necessary consequence of focusing on the resulting value of the human-space relation which came next to its ontological value, requests the value of the space design as an attempt of various phenomenal experience in the relation of technology, human, and space to be educationally established. From a typological point of view, no true creation exists in any form of design. It is practically impossible to design in the void without any restrictions, and all design is based on preceding examples. This is because production of artificial is based on the universal principles or structure residing in history, namely, typology. Considering Digital Space from technological and cultural standpoints, it can obviously be called a new type of space, and beyond that, it becomes a new type of a methodological tool of design. Thus, the purpose of this study is to systematize the paradigm of the space design in the digital era by studying the concept of space in Digital Space from the standpoints of history and context, that is typology, and in accordance with it, classify the phases of the space design that is led digitally.at is led digitally.

• Nuclear Engineering and Technology
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• 제51권3호
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• pp.692-701
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• 2019

Recently, instrumentation and control (I&C) systems in nuclear power plants have undergone digitalization. Owing to the unique characteristics of digital I&C systems, the reliability analysis of digital systems has become an important element of probabilistic safety assessment (PSA). In a reliability analysis of digital systems, fault-tolerant techniques and their effectiveness must be considered. A fault injection experiment was performed on a safety-critical digital I&C system developed for nuclear power plants to evaluate the effectiveness of fault-tolerant techniques implemented in the target system. A software-implemented fault injection in which faults were injected into the memory area was used based on the assumption that all faults in the target system will be reflected in the faults in the memory. To reduce the number of required fault injection experiments, the memory assigned to the target software was analyzed. In addition, to observe the effect of the fault detection coverage of fault-tolerant techniques, a PSA model was developed. The analysis of the experimental result also can be used to identify weak points of fault-tolerant techniques for capability improvement of fault-tolerant techniques

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 추계종합학술대회 논문집
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• pp.951-954
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• 1999

A direct digital frequency synthesizer is designed in full custom method using 0.65${\mu}{\textrm}{m}$ CMOS n-well technology The chip provides the capability of the parallel operation using up to 4 chips with an operation frequency of 440MHz. The generated waveform can be modulated by various modulation techniques such as QPSK, 256 . 64. 32 . 16 QAM and FM.

• 한국군사과학기술학회지
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• 제25권5호
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• pp.501-512
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• 2022

The purpose of the weapon live test during the phase of development is to provide essential information to decision makers that verify and validate the performance capabilities of weapons. Due to varying allocation and high variance of test resources with an increase in the weapon system's capability, the test environment can get highly complex, which can lead to a decrease in the reliability of test results. This issue can be addressed by applying a decision support system that provides various timely information collected by resources during the test process. The decision support system can be designed by applying the concept of digital twins, that are defined as digital replicas of components, systems and processes. This paper describes a design methodology of the decision support system that consists of digital models and service functions using digital twin architecture. A case study illustrates the feasibility of the proposed methodology in supporting the weapon live test process.