• 제목/요약/키워드: Particle Swarm Optimization

검색결과 714건 처리시간 0.025초

구역전기사업자 구성을 위한 Phasor Discrete Particle Swarm Optimization 알고리즘 (Phasor Discrete Particle Swarm Optimization Algorithm to Configure Community Energy Systems)

  • 배인수;김진오
    • 조명전기설비학회논문지
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    • 제23권9호
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    • pp.55-61
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    • 2009
  • 본 논문에서는 구역전기사업자를 구성하는데 적용하기 위해, 기존의 최적화 기법인 Discrete Particle Swarm Optimization (DPSO) 알고리즘을 개량한 Phasor DPSO (PDPSO) 알고리즘을 새롭게 제시한다. 구역전기사업자는 전력구입 뿐만 아니라 전력판매도 가능하고, 미리 계약한 수용가의 전력부하에게 전력을 공급할 의무가 있다. 하나의 배전계통에 다수의 구역전기사업자가 존재할 경우, 해당 배전계통 내의 모든 수용가에게 최소의 운영비용으로 전력을 공급하기 위해서는 다수 구역전기사업자 간에 구성형태를 조정할 필요가 있다. 이에 적용할 최적화 기법으로 본 논문은 PDPSO 알고리즘을 제안하며, 제안된 알고리즘의 각 개체는 기존의 다변수 벡터 대신 크기와 위상각으로 이루어진 다변수 페이저 값을 갖는다.

유전자형-표현형 개념을 적용한 수정된 이진 입자군집최적화 (버전 2) (Modified Binary Particle Swarm Optimization using Genotype-Phenotype Concept (Version 2))

  • 임승균;이상욱
    • 한국콘텐츠학회논문지
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    • 제14권11호
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    • pp.541-548
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    • 2014
  • 본 논문에서는 유전알고리즘의 유전자형-표현형 기법을 적용한 수정된 이진 입자군집최적화의 두 번째 버전을 소개한다. 입자군집최적화는 해를 탐색해 나가는 과정에서 주변의 우수한 해의 위치와 자신의 위치차이 정보를 이용한다. 이러한 위치 차이를 구하는데 있어서 첫 번째 버전의 수정된 이진 입자군집최적화는 표현형을 사용한 반면에 제안하는 버전은 유전자형을 사용한다. 이진 정보만을 제공하는 표현형에 비해 연속 공간 전체를 탐색공간으로 제공하는 유전자형 정보를 사용하여 해 공간을 보다 넓은 공간으로 표시할 수 있다. 벤치마크 함수인 10개의 De Jong 함수에 실험한 결과, 두 번째 버전은 탐색 공간이 넓고 지역 최적해가 많은 함수에서 첫 번째 버전에 보다 우수한 결과를 얻었다.

PSO를 이용한 이족보행로봇의 보행 계획 (Footstep Planning of Biped Robot Using Particle Swarm Optimization)

  • 김승석;김용태
    • 한국지능시스템학회:학술대회논문집
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    • 한국지능시스템학회 2007년도 추계학술대회 학술발표 논문집
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    • pp.86-90
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    • 2007
  • 본 논문에서는 Particle Swarm Optimization(PSO) 기법을 이용한 이족보행로봇의 보행 계획방법을 제안한다. 이족보행로봇의 보행 프리미티브를 기반으로 PSO의 학습 및 군집 특성을 이용하여 장애물이 있는 작업공간에서 보행 계획을 수행하였다. 먼저 PSO의 탐색알고리즘을 사용하여 장애물을 회피하는 실행 가능한 보행 프리미티브들의 순서를 찾아내고 탐색된 순서를 바탕으로 경로 최적화 알고리즘을 수행하는 보행 계획방법을 제안하였다. 제안된 PSO 기반 이족보행로봇의 보행 계획방법은 모의실험을 통하여 발걸음 탐색 시간이 줄고 최적화된 보행 경로를 생성하는 것을 검증하였다.

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Identification of Dynamic Load Model Parameters Using Particle Swarm Optimization

  • Kim, Young-Gon;Song, Hwa-Chang;Lee, Byong-Jun
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제10권2호
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    • pp.128-133
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    • 2010
  • This paper presents a method for estimating the parameters of dynamic models for induction motor dominating loads. Using particle swarm optimization, the method finds the adequate set of parameters that best fit the sampling data from the measurement for a period of time, minimizing the error of the outputs, active and reactive power demands and satisfying the steady-state error criterion.

Particle Swarm Optimization을 이용한 VPP 최적구성 (Optimal VPP Composition Using Particle Swarm Optimization)

  • 김동진;김성열;배인수;김진오
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 제38회 하계학술대회
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    • pp.778-779
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    • 2007
  • 기술의 진보와 친환경적 시대의 조류에 발맞추어 배전계통에서 분산전원의 이용은 더욱 증가하는 추세이다. 따라서 저용량의 다양한 분산전원을 하나의 가상발전소(Virtual Power Plant, VPP)로 운영하는 개념이 도입되고 있다. 본 논문은 Particle Swarm Optimization(PSO) 알고리즘을 이용하여 경제적 효율을 고려한 VPP의 최적구성을 다룬다. 사례연구로는 다양한 분산전원으로 구성된 시스템의 시간별 전력 및 열에너지 수요를 고려한 VPP의 최적구성을 수행한다.

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A modified particle swarm approach for multi-objective optimization of laminated composite structures

  • Sepehri, A.;Daneshmand, F.;Jafarpur, K.
    • Structural Engineering and Mechanics
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    • 제42권3호
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    • pp.335-352
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    • 2012
  • Particle Swarm Optimization (PSO) is a stochastic population based optimization algorithm which has attracted attentions of many researchers. This method has great potentials to be applied to many optimization problems. Despite its robustness the standard version of PSO has some drawbacks that may reduce its performance in optimization of complex structures such as laminated composites. In this paper by suggesting a new variation scheme for acceleration parameters and inertial weight factors of PSO a novel optimization algorithm is developed to enhance the basic version's performance in optimization of laminated composite structures. To verify the performance of the new proposed method, it is applied in two multi-objective design optimization problems of laminated cylindrical. The numerical results from the proposed method are compared with those from two other conventional versions of PSO-based algorithms. The convergancy of the new algorithms is also compared with the other two versions. The results reveal that the new modifications inthe basic forms of particle swarm optimization method can increase its convergence speed and evade it from local optima traps. It is shown that the parameter variation scheme as presented in this paper is successful and can evenfind more preferable optimum results in design of laminated composite structures.

Path Planning Algorithm Using the Particle Swarm Optimization and the Improved Dijkstra Algorithm

  • Kang, Hwan-Il;Lee, Byung-Hee;Jang, Woo-Seok
    • 한국지능시스템학회:학술대회논문집
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    • 한국지능시스템학회 2007년도 추계학술대회 학술발표 논문집
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    • pp.176-179
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    • 2007
  • In this paper, we develop the path planning algorithm using the improved Dijkstra algorithm and the particle swarm optimization. To get the optimal path, at first we construct the MAKLINK on the world environment and then make a graph associated with the MAKLINK. From the graph, we obtain the Dijkstra path between the starting point and the destination point. From the optimal path, we search the improved Dijkstra path using the graph. Finally, applying the particle swarm optimization to the improved Dijkstra path, we obtain the optimal path for the mobile robot. It turns out that the proposed method has better performance than the result in [1].

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Design of Solving Similarity Recognition for Cloth Products Based on Fuzzy Logic and Particle Swarm Optimization Algorithm

  • Chang, Bae-Muu
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제11권10호
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    • pp.4987-5005
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    • 2017
  • This paper introduces a new method to solve Similarity Recognition for Cloth Products, which is based on Fuzzy logic and Particle swarm optimization algorithm. For convenience, it is called the SRCPFP method hereafter. In this paper, the SRCPFP method combines Fuzzy Logic (FL) and Particle Swarm Optimization (PSO) algorithm to solve similarity recognition for cloth products. First, it establishes three features, length, thickness, and temperature resistance, respectively, for each cloth product. Subsequently, these three features are engaged to construct a Fuzzy Inference System (FIS) which can find out the similarity between a query cloth and each sampling cloth in the cloth database D. At the same time, the FIS integrated with the PSO algorithm can effectively search for near optimal parameters of membership functions in eight fuzzy rules of the FIS for the above similarities. Finally, experimental results represent that the SRCPFP method can realize a satisfying recognition performance and outperform other well-known methods for similarity recognition under considerations here.

A Short-Term Wind Speed Forecasting Through Support Vector Regression Regularized by Particle Swarm Optimization

  • Kim, Seong-Jun;Seo, In-Yong
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제11권4호
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    • pp.247-253
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    • 2011
  • A sustainability of electricity supply has emerged as a critical issue for low carbon green growth in South Korea. Wind power is the fastest growing source of renewable energy. However, due to its own intermittency and volatility, the power supply generated from wind energy has variability in nature. Hence, accurate forecasting of wind speed and power plays a key role in the effective harvesting of wind energy and the integration of wind power into the current electric power grid. This paper presents a short-term wind speed prediction method based on support vector regression. Moreover, particle swarm optimization is adopted to find an optimum setting of hyper-parameters in support vector regression. An illustration is given by real-world data and the effect of model regularization by particle swarm optimization is discussed as well.

A Study on a Gain-Enhanced Antenna for Energy Harvesting using Adaptive Particle Swarm Optimization

  • Kang, Seong-In;Kim, Koon-Tae;Lee, Seung-Jae;Kim, Jeong-Phill;Choi, Kyung;Kim, Hyeong-Seok
    • Journal of Electrical Engineering and Technology
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    • 제10권4호
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    • pp.1780-1785
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    • 2015
  • In this paper, the adaptive particle swarm optimization (APSO) algorithm is employed to design a gain-enhanced antenna with a reflector for energy harvesting. We placed the reflector below the main radiating element. Its back-radiated field is reflected and added to the forward radiated field, which could increase the antenna gain. We adopt the adaptive particle swarm optimization (APSO) algorithm, which improves the speed of convergence with a high frequency solver. The result shows that performance of the optimized design successfully satisfied the design goal of the frequency band, gain and axial ratio.