• 제목/요약/키워드: Optimization Technique

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생산공정의 모델링과 SIMAN 언어에 의한 모델분석 (A modeling of manufacturing system and a model analysis by a SIMAN language)

  • 이만형;김경천;한성현
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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    • pp.300-306
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    • 1987
  • This paper deals with a modeling of manufacturing system and a model analysis by a SIMAN language. A flow of production process is analyzed, and a mathematical model on the basis of the analyzed data is simulated by a SIMAN language. An object of this study is to achieve an optimization of production a reduction of cost, and an improvement of quality by a applicable line-balancing technique and an optimization technique in a real factor induced an analysis and synthesis of the result of simulation.

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진화 스트레티지를 이용한 CMAC 망 최적 설계 (Optimal Design of CMAC network Using Evolution Strategies)

  • 이선우;김상권;김종환
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 1997년도 춘계학술대회 학술발표 논문집
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    • pp.271-274
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    • 1997
  • This paper presents the optimization technique for design of a CMAC network by using an evolution strategies(ES). The proposed technique is designed to find the optimal parameters of a CMAC network, which can minimize the learning error between the desired output and the CMAC network's as well as the number of memory used in the CMAC network. Computer simulations demonstrate the effectiveness of the proposed design method.

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최적화 기법을 이용한 보울트 체결체의 강성 평가 (Stiffness Determination Of A Bolted Member Using Optimization Technique)

  • 김태완;조덕상;성기광;손용수;박성호
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 1993년도 봄 학술발표회논문집
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    • pp.151-157
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    • 1993
  • In this paper a useful method on evaluating the joint stiffness of bolted memeber was introduced using optimization technique on the basis of Finite Element Method. A finite element model having one directional gap element at bo undary area was introduced to compensate the prying force in jointed members which might caused by geometrical configuration of members. Results showed a good aggrement with classical method in certain range and will be available to definine the design margine of pre-load design.

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Yagi-Uda 안테나의 최적설계에 관한 연구 (A Study on Optimum Design of Yagi-Uda Antenna)

  • 이선미;천창율
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 C
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    • pp.1207-1209
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    • 1994
  • An optimization technique applicable to the Yagi-Uda antenna was proposed in this paper. An objective function, which is the gain of the antenna in our case, was computed using method of moments. Design variables for the Yagi-Uda antenna were chosen with lengths, positions and diameters of the antenna elements. For the optimization process, the evolution strategy technique was adopted. The results were compared with existing results and showed better performances.

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지하철 환기시스템의 최적화에 관한 연구 (Study on optimization technique for the design of ventilation system of subway)

  • 김광용;조재형;리쉬밍;양태윤
    • 설비공학논문집
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    • 제10권5호
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    • pp.630-639
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    • 1998
  • The present research aimed at development of a computer code for the optimal design of ventilation system based on one-dimensional analysis of the air flow. Model experiment and three-dimensional flow analysis have been implemented to determine loss coefficients that were needed for the optimization technique. A research on optimum shape of ventilation shaft has been also carried out through the three-dimensional analysis of the flow.

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대형동적 시스템의 최적화 앨고리즘 및 프로그램 개발에 관한 연구 (Algorithms and Programs for Optimization of Large-Scale Dynamic System)

  • 양흥석;박영문;김건중
    • 대한전기학회논문지
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    • 제32권4호
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    • pp.121-127
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    • 1983
  • In this paper an efficient algorithm for Pontriagin's maximum principle is developed. Fletcher-Powell method is adopted as optimization technique which shows fast and stable convergence characteristics. Terminal constraints are alse considered by using Hestens' algorithm and penalty function method together. Control variable inequality constraints are also considered by using Gradient Projection technique combined with Flectcher-Powell method. Test experiment shows good and reliable results.

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InSb TFT의 제작과 최적화 기법에 의한 파라메타 추출 (Fabrication of InSb TFT and Parameters EXtraction Using Optimization Technique)

  • 김홍배;손상희;곽계달
    • 대한전자공학회논문지
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    • 제24권1호
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    • pp.67-72
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    • 1987
  • InSb TFT is fabricated by the vacuum evaporation method and I-V characteristics are measured. Employing Davidon Fletcher-Powell algorithm, the device parameters are extracted. The current-voltage relations calculated by extracdted parameters are in good agreement with experimental results. It is found that optimization technique may be more simple and accurate than curve fitting method in device parameters extration.

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Charging Control Strategy of Electric Vehicles Based on Particle Swarm Optimization

  • Boo, Chang-Jin
    • 전기전자학회논문지
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    • 제22권2호
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    • pp.455-459
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    • 2018
  • In this paper, proposed a multi-channel charging control strategy for electric vehicle. This control strategy can adjust the charging power according to the calculated state-of-charge (SOC). Electric vehicle (EV) charging system using Particle Swarm Optimization (PSO) algorithm is proposed. A stochastic optimization algorithm technique such as PSO in the time-of-use (TOU) price used for the energy cost minimization. Simulation results show that the energy cost can be reduced using proposed method.

적응 FLC-FNN 제어기에 의한 IPMSM의 효율 최적화 제어 (Efficiency Optimization Control of IPMSM with Adaptive FLC-FNN Controller)

  • 최정식;고재섭;정동화
    • 전기학회논문지P
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    • 제56권2호
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    • pp.74-82
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    • 2007
  • Interior permanent magnet synchronous motor(IPMSM) has become a popular choice in electric vehicle applications, due to their excellent power to weight ratio. This paper proposes efficiency optimization control of IPMSM drive using adaptive fuzzy learning control fuzzy neural network (AFLC-FNN) controller. In order to maximize the efficiency in such applications, this paper proposes the optimal control method of the armature current. The controllable electrical loss which consists of the copper loss and the iron loss can be minimized by the optimal control of the armature current. The minimization of loss is possible to realize efficiency optimization control for the proposed IPMSM. The optimal current can be decided according to the operating speed and the load conditions. This paper considers the design and implementation of novel technique of high performance speed control for IPMSM using AFLC-FNN controller. Also, this paper proposes speed control of IPMSM using AFLC-FNN and estimation of speed using ANN controller. The back propagation neural network technique is used to provide a real time adaptive estimation of the motor speed. The proposed control algorithm is applied to IPMSM drive system controlled AFLC-FNN controller, the operating characteristics controlled by efficiency optimization control are examined in detail.

구조 최적화를 위한 비정형 구조시스템의 인터페이스 기법 (Interface Technique for Optimization of Free-form Structural System)

  • 나유미;이재홍;강주원
    • 한국공간구조학회논문집
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    • 제12권1호
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    • pp.43-50
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    • 2012
  • 최근 컴퓨터 기술의 발달로 인해 복잡한 형태를 가지는 기념비적인 건축물이 설계, 시공됨에 따라 비정형건축에 관한 사회적인 관심이 해외뿐만 아니라 국내에서도 증가하고 있다. 하지만 비정형 구조시스템의 구현하기 위한 기술 및 연구에 대한 사례가 부족하여 많은 어려움이 있다. 이러한 문제를 해결하기 위해 본 연구에서는 3D모델링 프로그램과 최적설계를 수행하는 프로그램간의 인터페이스 모듈에 대한 연구를 수행하였다. 3D 모델링 프로그램에서 자동 메쉬를 생성하고, 모델링에 대한 정보를 바로 추출하여 최적화를 수행하였다. 결과적으로 개발된 인터페이스 모듈의 검증을 위해 예제 모델을 선정하여 형상최적화을 수행하였다.