• Title/Summary/Keyword: network base control

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The Study on Inconsistent Rule Based Fuzzy Logic Control using Neural Network

  • Cho, Jae-Soo;Park, Dong-Jo;Z. Bien
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 1997.11a
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    • pp.145-150
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    • 1997
  • In this paper is studied a method of fuzzy logic control based on possibly inconsistent if-then rules representing uncertain knowledge or imprecise data. In most cases of practical applications adopting fuzzy if-then rule bases, inconsistent rules have been considered as ill-defined rules and, thus, not allowed to be in the same rule base. Note, however, that, in representing uncertain knowledge by using fuzzy if-then rules, the knowledge sometimes can not be represented in literally consistent if-then rules. In this regard, when it is hard to obtain consistent rule base, we propose the weighted rule base fuzzy logic control depending on output performance using neural network and we will derive the weight update algorithm. Computer simulations show the proposed method has good performance to deal with the inconsistent rule base fuzzy logic control. And we discuss the real application problems.

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A rule base derivation method using neural networks for the fuzzy logic control of robot manipulators (로봇 매니퓰레이터의 퍼지논리 제어를 위한 신경회로망을 사용한 규칙 베이스 유도방법)

  • 이석원;경계현;김대원;이범희;고명삼
    • 제어로봇시스템학회:학술대회논문집
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    • 1992.10a
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    • pp.441-446
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    • 1992
  • We propose a control architecture for the fuzzy logic control of robot manipulators and a rule base derivation method for a fuzzy logic controller(FLC) using a neural network. The control architecture is composed of FLC and PD(positional Derivative) controller. And a neural network is designed in consideration of the FLC's structure. After the training is finished by BP(Back Propagation) and FEL(Feedback Error Learning) method, the rule base is derived from the neural network and is reduced through two stages - smoothing, logical reduction. Also, we show the performance of the control architecture through the simulation to verify the effectiveness of our proposed method.

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The Development of Motor Controller based on Network using Optic-EtherCAT (광 EtherCAT을 이용한 네트워크 기반 모터 제어기 개발)

  • Moon, Yong-Seon;Lee, Gwang-Seok;Seo, Dong-Jin;Bae, Young-Chul
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.5
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    • pp.467-472
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    • 2008
  • In this paper, we design, implement and apply network physical layer to 100 BaseFx optical cable interface module based on industrial ethernet protocol which is physical layer of EtherCAT that has ensure its open standard ethernet compatibility which having been provided with real time of control in network of intelligent service robot, can be process numerous data to sensor and motor control system. Through BLDC motor control performance tests, we try to propose suitability as internal network of intelligent service robot and automation system.

Development of the Base Station Transceiver Subsystem in the CDMA Mobile System

  • Lee, Dong-Wook;Yoo, Ki-Suk;Kim, Jin-Su;Kim, Myoung-Jin;Park, Jae-Hong
    • ETRI Journal
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    • v.19 no.3
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    • pp.116-140
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    • 1997
  • The base station transceiver subsystem (BTS) of the CDMA Mobile System is interfaced to mobile stations over the air and to the wired network through a packet switched interconnection network. The potential benefits of CDMA technology are achieved when the transmitter and the receiver are properly designed and implemented. The physical layer of the interface at the base station is implemented with the CDMA ASICs and control circuits in channel card of the BTS. We present the design perspectives and structural illustration of the BTS. Base station modem ASICs and their control to implement the CDMA receiver, Baseband and RF signal processing blocks, and BTS controller are described. Elaborate power control is essential to ensure the high capacity which is one of advantages of the CDMA technology. The closed loop reverse link power control and the forward link power control operated in the BTS are described.

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Infrared and visible image fusion based on Laplacian pyramid and generative adversarial network

  • Wang, Juan;Ke, Cong;Wu, Minghu;Liu, Min;Zeng, Chunyan
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.15 no.5
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    • pp.1761-1777
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    • 2021
  • An image with infrared features and visible details is obtained by processing infrared and visible images. In this paper, a fusion method based on Laplacian pyramid and generative adversarial network is proposed to obtain high quality fusion images, termed as Laplacian-GAN. Firstly, the base and detail layers are obtained by decomposing the source images. Secondly, we utilize the Laplacian pyramid-based method to fuse these base layers to obtain more information of the base layer. Thirdly, the detail part is fused by a generative adversarial network. In addition, generative adversarial network avoids the manual design complicated fusion rules. Finally, the fused base layer and fused detail layer are reconstructed to obtain the fused image. Experimental results demonstrate that the proposed method can obtain state-of-the-art fusion performance in both visual quality and objective assessment. In terms of visual observation, the fusion image obtained by Laplacian-GAN algorithm in this paper is clearer in detail. At the same time, in the six metrics of MI, AG, EI, MS_SSIM, Qabf and SCD, the algorithm presented in this paper has improved by 0.62%, 7.10%, 14.53%, 12.18%, 34.33% and 12.23%, respectively, compared with the best of the other three algorithms.

A Distributed Power Control Algorithm for Data Load Balancing with Coverage in Dynamic Femtocell Networks (다이나믹 펨토셀 네트워크에서 커버리지와 데이터 부하 균형을 고려한 기지국의 파워 조절 분산 알고리즘)

  • Shin, Donghoon;Choi, Sunghee
    • KIISE Transactions on Computing Practices
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    • v.22 no.2
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    • pp.101-106
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    • 2016
  • A femtocell network has been attracting attention as a promising solution for providing high data rate transmission over the conventional cellular network in an indoor environment. In this paper, we propose a distributed power control algorithm considering both indoor coverage and data load balancing in the femtocell network. As data traffic varies by time and location according to user distribution, each femto base station suffers from an unbalanced data load, which may degrade network performance. To distribute the data load, the base stations are required to adjust their transmission power dynamically. Since there are a number of base stations in practice, we propose a distributed power control algorithm. In addition, we propose the simple algorithm to detect the faulty base station and to recover coverage. We also explain how to insert a new base station into a deployed network. We present the simulation results to evaluate the proposed algorithms.

Performance Improvement of Wireless Mesh Networks using TCP Congestion Control Algorithm (TCP 혼잡제어 알고리즘을 이용한 무선 메쉬 네트워크의 성능 개선)

  • Lee, Hye-Rim;Moon, Il-Young
    • Journal of Advanced Navigation Technology
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    • v.14 no.2
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    • pp.253-259
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    • 2010
  • Wireless mesh network is flexible network like Ad hoc network or bluetooth together based on base station. But, wireless mesh network shows high packet loss and when TCP was created, however as it was design based on wired link, wireless link made more transmission error than wired link. It is existent problem of TCP congestion control algorithm that TCP unfairness and congestion collapse over wireless mesh network. When TCP operation occurs with the packet loss where is not the congestion loss, it brings the performance degradation which is serious. In this paper, in order to improve efficient TCP congestion control algorithm in wireless mesh network, we proposed that TCP can adaptively regulate the congestion window in wireless link.

Synchronization Control of Multiple Motors using CAN Clock Synchronization (CAN 시간동기를 이용한 복수 전동기 동기제어)

  • Khoa Do, Le Minh;Suh, Young-Soo
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.7
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    • pp.624-628
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    • 2008
  • This paper is concerned with multiple motor control using a distributed network control method. Speed and position of multiple motors are synchronized using clock synchronized distributed controllers. CAN (controller area network) is used and a new clock synchronization algorithm is proposed and implemented. To verify the proposed control algorithm, two disks which are attached on two motor shafts are controlled to rotate at the same speed and phase angle with the same time base using network clocks.

Dynamic Access and Power Control Scheme for Interference Mitigation in Femtocell Networks

  • Ahmed, Mujeeb;Yoon, Sung-Guk
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.11
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    • pp.4331-4346
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    • 2015
  • The femtocell network, which is designed for low power transmission and consists of consumer installed small base stations, coexists with macrocells to exploit spatial reuse gain. For its realization, cross-tier interference mitigation is an important issue. To solve this problem, we propose a joint access and power control scheme that requires limited information exchange between the femto and macro networks. Our objective is to maximize the network throughput while satisfying each user's quality of service (QoS) requirement. To accomplish this, we first introduce two distributed interference detection schemes, i.e., the femto base station and macro user equipment based schemes. Then, the proposed scheme dynamically adjusts the transmission power and makes a decision on the access mode of each femto base station. Through extensive simulations, we show that the proposed scheme outperforms earlier works in terms of the throughput and outage probability.

The development network based on motor driver for modular robot implementation (모듈로봇 구현을 위한 네트워크기반 모터제어드라이버 개발)

  • Moon, Yong-Seon;Lee, Gwang-Seok;Seo, Dong-Jin;Lee, Sung-Ho;Bae, Young-Chul
    • Journal of the Korean Institute of Intelligent Systems
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    • v.17 no.7
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    • pp.887-892
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    • 2007
  • In this paper, we design, implement and apply network physical layer to 100 BaseFx optical cable interface module based on industrial ethernet protocol EtherCAT that has ensure its open standard ethernet compatibility which haying been provided with real time of control in network of intelligent service robot, can process numerous data to sensor and motor control system. Through various tests, we try to propose suitability as internal network of intelligent service robot.