• 제목/요약/키워드: dynamic neural unit

검색결과 45건 처리시간 0.023초

동적 신경망의 층의 분열과 합성에 의한 비선형 시스템 제어 (Control of Nonlinear System by Multiplication and Combining Layer on Dynamic Neural Networks)

  • 박성욱;이재관;서보혁
    • 대한전기학회논문지:전력기술부문A
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    • 제48권4호
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    • pp.419-427
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    • 1999
  • We propose an algorithm for obtaining the optimal node number of hidden units in dynamic neural networks. The dynamic nerual networks comprise of dynamic neural units and neural processor consisting of two dynamic neural units; one functioning as an excitatory neuron and the other as an inhibitory neuron. Starting out with basic network structure to solve the problem of control, we find optimal neural structure by multiplication and combining dynamic neural unit. Numerical examples are presented for nonlinear systems. Those case studies showed that the proposed is useful is practical sense.

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DESIGN OF CONTROLLER FOR NONLINEAR SYSTEM USING DYNAMIC NEURAL METWORKS

  • Park, Seong-Wook;Seo, Bo-Hyeok
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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    • pp.60-64
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    • 1995
  • The conventional neural network models are a parody of biological neural structures, and have very slow learning. In order to emulate some dynamic functions, such as learning and adaption, and to better reflect the dynamics of biological neurons, M.M. Gupta and D.H. Rao have developed a 'dynamic neural model'(DNU). Proposed neural unit model is to introduce some dynamics to the neuron transfer function, such that the neuron activity depends on internal states. Integrating an dynamic elementry processor within the neuron allows the neuron to act dynamic response Numerical examples are presented for a model system. Those case studies showed that the proposed DNU is so useful in practical sense.

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Dynamic Neural Unit와 GA를 이용한 비선형 동적 시스템 제어 (Dynamic Neural Units and Genetic Algorithms With Applications to the Control of Unknown Nonlinear Systems)

  • 조현섭;노용기;장성환
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2006년도 춘계학술발표논문집
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    • pp.311-315
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    • 2006
  • "Dynamic Neural Unit"(DNU) based upon the topology of a reverberating circuit in a neuronal pool of the central nervous system. In this thesis, we present a genetic DNU-control scheme for unknown nonlinear systems. Our methodis different from those using supervised learning algorithms, such as the backpropagation (BP) algorithm, that needs training information in each step. The contributions of this thesis are the new approach to constructing neural network architecture and its trainin

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궤도차량의 동적 제어를 위한 퍼지-뉴런 제어 알고리즘 개발 (Development of a Neural-Fuzzy Control Algorithm for Dynamic Control of a Track Vehicle)

  • 서운학
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
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    • pp.142-147
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    • 1999
  • This paper presents a new approach to the dynamic control technique for track vehicle system using neural network-fuzzy control method. The proposed control scheme uses a Gaussian function as a unit function in the neural network-fuzzy, and back propagation algorithm to train the fuzzy-neural network controller in the framework of the specialized learning architecture. It is proposed a learning controller consisting of two neural network-fuzzy based on independent reasoning and a connection net with fixed weights to simply the neural networks-fuzzy. The performance of the proposed controller is shown by simulation for trajectory tracking of the speed and azimuth of a track vehicle.

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상태변수 표현을 가진 동적 신경망을 이용한 비선형 시스템의 식별과 제어 (Identification and Control of Nonlinear System Using Dynamic Neural Model with State Parameter Representation)

  • 박성욱;서보혁
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1995년도 추계학술대회 논문집 학회본부
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    • pp.157-160
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    • 1995
  • Neural networks potentially offer a general framework for modeling and control of nonlinear systems. The conventional neural network models are a parody of biological neural structures, and have very slow learning. In order to emulate some, dynamic functions, such as learning and adaption, and to better reflect the dynamics of biological neurons, M.M.Gupta and D.H.Rao have developed a 'dynamic neural model'(DNU). Proposed neural unit model is to introduce some dynamics to the neuron transfer function, such that the neuron activity depends on internal states. Numerical examples are presented for a model system. Those case studies showed that the proposed DNU is so useful in practical sense.

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신경회로망을 이용한 동적 시스템의 자기동조 제어기 설계 (Design of auto-tuning controller for Dynamic Systems using neural networks)

  • 조현섭;오명관
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2007년도 춘계학술발표논문집
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    • pp.147-149
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    • 2007
  • "Dynamic Neural Unit"(DNU) based upon the topology of a reverberating circuit in a neuronal pool of the central nervous system. In this thesis, we present a genetic DNU-control scheme for unknown nonlinear systems. Our methodis different from those using supervised learning algorithms, such as the backpropagation (BP) algorithm, that needs training information in each step. The contributions of this thesis are the new approach to constructing neural network architecture and its trainin.

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동적시스템의 자동동조를 위한 신경망 알고리즘 응용 (Neural Network Algorithm Application to Auto-tuning of Dynamic Systems)

  • 조현섭
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2006년도 추계학술발표논문집
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    • pp.186-190
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    • 2006
  • "Dynamic Neural Unit"(DNU) based upon the topology of a reverberating circuit in a neuronal pool of the central nervous system. In this thesis, we present a genetic DNU-control scheme for unknown nonlinear systems. Our methodis different from those using supervised learning algorithms, such as the backpropagation (BP) algorithm, that needs training information in each step. The contributions of this thesis are the new approach to constructing neural network architecture and its trainin.

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교육용 시스템 개발과 실시간 비선형 제어(II) (Development of an Educational System and Real Time Nonlinear Control (II))

  • 박성욱
    • 대한전기학회논문지:시스템및제어부문D
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    • 제51권12호
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    • pp.571-576
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    • 2002
  • This paper is to develop jumping ring system with three sensor arrays and to control levitated ring using dynamic neural mode. Placing an aluminum ring on the core and switching on an AC source causes the ring to jump in the air due to induced currents. The educational system is composed of 40th optical sensor array, encode circuit, 89C51 microprocessor and control board. The control board consists of power IC, and phase controller. Real time process is present to obtain a height of levitated ring for three different sensor arrays. Based on the educational system and the proposed dynamic neural mode, the height of levitation of the ring is controlled by reference signals. This paper focuses on real system controls using the dynamic neural mode with on line learning algorithm.

A layer-wise frequency scaling for a neural processing unit

  • Chung, Jaehoon;Kim, HyunMi;Shin, Kyoungseon;Lyuh, Chun-Gi;Cho, Yong Cheol Peter;Han, Jinho;Kwon, Youngsu;Gong, Young-Ho;Chung, Sung Woo
    • ETRI Journal
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    • 제44권5호
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    • pp.849-858
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    • 2022
  • Dynamic voltage frequency scaling (DVFS) has been widely adopted for runtime power management of various processing units. In the case of neural processing units (NPUs), power management of neural network applications is required to adjust the frequency and voltage every layer to consider the power behavior and performance of each layer. Unfortunately, DVFS is inappropriate for layer-wise run-time power management of NPUs due to the long latency of voltage scaling compared with each layer execution time. Because the frequency scaling is fast enough to keep up with each layer, we propose a layerwise dynamic frequency scaling (DFS) technique for an NPU. Our proposed DFS exploits the highest frequency under the power limit of an NPU for each layer. To determine the highest allowable frequency, we build a power model to predict the power consumption of an NPU based on a real measurement on the fabricated NPU. Our evaluation results show that our proposed DFS improves frame per second (FPS) by 33% and saves energy by 14% on average, compared with DVFS.

퍼지-뉴럴 제어기법에 의한 궤도차량의 동적 제어 (Dynamic Control of Track Vehicle Using Fuzzy-Neural Control Method)

  • 한성현;서운학;조길수;윤강섭
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 춘계학술대회 논문집
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    • pp.133-139
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    • 1997
  • This paper presents a new approach to the dynamic control technique for track vehicle system using neural network-fuzzy control method. The proposed control scheme uses a Gaussian function as a unit function in the neural network-fuzzy, and back propagation algorithm to train the fuzzy-neural network controller in the framework of the specialized learning architecture. It is propored a learning controller consisting of two neural network-fuzzy based on independent resoning and a connection net with fixed weights to simply the neural network-fuzzy. The performance of the proposed controller is shown by simulation for trajectory tracking of the speed and azimuth of a track vehicle

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