• Title, Summary, Keyword: Systems design

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High Speed and Sensitive X-ray Analysis System with Automated Aberration Correction Scanning Transmission Electron Microscope

  • Inada, Hiromi;Hirayama, Yoichi;Tamura, Keiji;Terauchi, Daisuke;Namekawa, Ryoji;Shichiji, Takeharu;Sato, Takahiro;Suzuki, Yuya;Ohtsu, Yoshihiro;Watanabe, Keitaro;Konno, Mitsuru;Tanaka, Hiroyuki;Saito, Koichiro;Shimoyama, Wataru;Nakamura, Kuniyasu;Kaji, Kazutoshi;Hashimoto, Takahito
    • Applied Microscopy
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    • v.45 no.1
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    • pp.1-8
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    • 2015
  • We have developed a new HD-2700 (Hitachi High-Technologies Corp., Japan) scanning transmission electron microscope (STEM) that includes an automatic aberration correction function, and a large-solid-angle energy-dispersive X-ray spectroscopy detector that enables high-resolution and sensitive analysis. For observation with atomic resolution, using spherical-aberration-corrected STEM, in order that satisfactory performance of the device can be achieved readily, and within a short time, irrespective of the operator's skill level, a spherical-aberration-correction device with an automatic aberration-correction function was developed. This automatic aberration-correction function carries out the entire correction-related process (aberration measurement, selection and correction) automatically, with automatic selection of the aberrations that require correction, and automatic measurement of the appropriate corrections.

Designing Services with Models from Interaction Design and Cognitive Systems Engineering

  • Lee, Dong-Seok;Pan, Young-Hwan
    • Journal of the Ergonomics Society of Korea
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    • v.31 no.1
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    • pp.125-130
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    • 2012
  • Objective: This paper discusses how service design is related to two well-known disciplines, interaction design and cognitive systems engineering, which are applied to the design of software, websites and mobile phones, and the design of control room of nuclear power plants and cockpit control, respectively. Background: Service design has been spotlighted recently due to its promisingness to service industry. Successful cases of service design are widely shared among designers. Service design, however, is treated as practice rather than a discipline. Method: It was discussed that it is important to consider the interaction between customers and services as in interaction design, and some domains are complex enough and have functional limitation as in cognitive systems engineering. Results: Models and design tools of the disciplines are introduced and applied to service design practices. Conclusion: It was concluded that service design has the characteristics of both interaction design and cognitive systems engineering.

Integrated Design of High-speed Feed Drive Systems (고속 이송계의 통합설계)

  • Kim, Min-Soek;Chung, Sung-Chong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.12
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    • pp.2028-2038
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    • 2003
  • High-speed feed drive systems have been widely used in the manufacturing and semiconductor industries. Specifications for high-speed systems require more advanced capabilities than conventional feed drive systems. It is necessary to devise special design concepts to achieve the level of performance for high-speed feed drive systems. In this paper, an integrated design method is proposed for high-speed feed drive systems in which the interactions between mechanical and electrical subsystems ought to be considered simultaneously during the design process. Based on the integrated design method, a nonlinear optimal design procedure of mechanical subsystems considering the Abbe and radius errors is accomplished through the design process of electrical subsystems satisfying the control stability and the saturation condition of actuators as well as the relative stability. Both mechanical and electrical parameters are considered as design variables. Simulations and numerical case studies show that the integrated design method of high-speed feed drive systems creates results satisfying the desired performances of mechatronic systems.

On the Integration of Systems Design and Systems Safety Processes from an Integrated Data Model Viewpoint (데이터모델 관점에서의 시스템설계 및 시스템안전 프로세스의 통합에 관한 연구)

  • Kim, Young-Min;Lee, Jae-Chon
    • Journal of the Korea Safety Management & Science
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    • v.14 no.4
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    • pp.107-116
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    • 2012
  • The issues raised so far in the development of safety-critical systems have centered on how effectively the safety requirements are met in systems design. The systems are becoming more complex due to the increasing demand on the functionality and performance. As such, the integration of both the systems design and systems safety processes becomes more important and at the same time quite difficult to carry out. In this paper, an approach to solving the problem is presented, which is based on an integrated data model. To do so, the data generated from the inputs and outputs of the systems design and systems safety processes are analyzed first. The results of analysis are used to extract common attributes among the data, thereby making it possible to define classes. The classes then become the cores of the interface data model through which the interaction between the two processes under study can be modeled and interpreted. The approach taken has also been applied in a design case to demonstrate its value. It is expected that the results of the study could play a role of the stepping stone in extending to the architecture development of the integrated process.

Precedent based design foundations for parametric design: The case of navigation and wayfinding

  • Kondyli, Vasiliki;Bhatt, Mehul;Hartmann, Timo
    • Advances in Computational Design
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    • v.3 no.4
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    • pp.339-366
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    • 2018
  • Parametric design systems serve as powerful assistive tools in the design process by providing a flexible approach for the generation of a vast number of design alternatives. However, contemporary parametric design systems focus primarily on low-level engineering and structural forms, without an explicit means to also take into account high-level, cognitively motivated people-centred design goals. We present a precedent-based parametric design method that integrates people-centred design "precedents" rooted in empirical evidence directly within state of the art parametric design systems. As a use-case, we illustrate the general method in the context of an empirical study focusing on the multi-modal analysis of wayfinding behaviour in two large-scale healthcare environments. With this use-case, we demonstrate the manner in which: (1). a range of empirically established design precedents -e.g., pertaining to visibility and navigation- may be articulated as design constraints to be embedded directly within state of the art parametric design tools (e.g., Grasshopper); and (2). embedded design precedents lead to the (parametric) generation of a number of morphologies that satisfy people-centred design criteria (in this case, pertaining to wayfinding). Our research presents an exemplar for the integration of cognitively motivated design goals with parametric design-space exploration methods. We posit that this opens-up a range of technological challenges for the engineering and development of next-generation computer aided architecture design systems.

A study on the optimal design for heat insulation of hot water piping systems using a dynamic programming (동적계획법을 이용한 고온수배관의 최적보온설계에 관한 연구)

  • 유희한;하주식
    • Journal of Advanced Marine Engineering and Technology
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    • v.11 no.1
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    • pp.39-52
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    • 1987
  • Recently, the design problem of heat insulation have been reappraised in the aspect of energy saving due to the rising trend of energy cost. For example, that design problem is increasingly requsted in the fields of accommodation air conditioning systems, hot water supply systems, cargo handling systems, district heating or cooling systems. The rational design of heat insulation of piping systems can not only improve the overall efficiency of energy transfer but also give energy saving. In this paper, the heat insulation problem of district heating systems is therefore modeled as the multi-stage decision processes, suitable for dynamic programming technique. And take the object function as the sum of heat insulation material cost involved construction cost and heat loss cost, and propose the design method to minimize the object function for overall piping systems by dynamic programing. Effectiveness of design method presented here is proved by a computer simulation.

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A Study on the Integration of Systems Engineering Process and Systems Safety Process in the Conceptual Design Stage to Improve Systems Safety (시스템 개념설계 단계에서 안전도 향상을 위한 시스템공학 및 시스템안전 프로세스의 통합에 관한 연구)

  • Kim, Young-Min;Lee, Jae-Chon
    • Journal of the Korea Safety Management & Science
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    • v.14 no.3
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    • pp.1-10
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    • 2012
  • Recently, we have witnessed the definitely negative impacts of large-scale accidents happened in such areas as atomic power plants and high-speed train systems, which result in increased fear for the potential danger. The problems appear to arise due to the deficiency in the design of large-scale complex systems. One of the causes can be attributed to the design process that does not fully reflect the safety requirements in the early stage of the system development because of the substantially increased complexity. In this paper, to enhance the systems safety an integrated process is studied, which considers simultaneously both the system design process and system safety process from the beginning of the system development. In the conceptual system design phase an integrated process model is constructed by analyzing the activities of both the system design and safety processes. As a case study example, an inner city train system is described with the application of the developed process. The computer simulation of the example case is followed by the result discussed. The results obtained in the paper are expected to be the basis for the future study where a detailed process and its associated activities can be developed.

A design method of decentralized control system by sequential loop closing

  • Takemori, Fumiaki;Okuyama, Yoshifumi;Chen, Hong
    • 제어로봇시스템학회:학술대회논문집
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    • pp.16-19
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    • 1994
  • This paper describes a design method of compensators for decentralized control systems. Decentralized control problem is convenient to design multi-variable control systems and formulated as a series of independent designs. The proposed design method is composed of some steps, which is sequentially to close loop of the system diagonalized by regarding interactive subsystem as perturbation for current loop. So, on the basis of H$_{\infty}$ control theory, decentralized controllers are designed considering robust stability for diagonal systems with perturbations. A numerical example shows that the proposed design method is effective for multivariable control systems..

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Sample design of cooling systems for each energy source (에너지원별 냉방기기 표본설계)

  • Kang, Yong-Tae;Lee, Deok-Joo;Kim, Euy-Kyung;Jeon, Ho-Cheol
    • Proceedings of the SAREK Conference
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    • pp.202-208
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    • 2008
  • The objectives of this study are to collect the population of each cooling system for gas and electric driven systems, and propose sample design for five cooling systems; ice storage systems, system air-conditioning system, turbo system as electric driven cooling systems, and absorption system and Gas driven Heat Pump (GHP) system as gas driven cooling systems. The sample design are carried out based on types of business, capacity, installation region and year. This study proposes criterion of the sample design for cooling systems for each energy source.

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