• Title, Summary, Keyword: Wireless Control System

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Design and implementation of wireless home network system using Home Network Control Protocol

  • Yoon, Dae-Kil;Lee, Kam-Rok;Myoung, Kwan-Joo;Kwon, Wook-Hyun
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1558-1562
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    • 2005
  • This paper describes the design and implementation of a wireless home network system using Home Network Control Protocol (HNCP) called the wireless HNCP home network system. For wireless interfaces of HNCP, IEEE 802.11b and IEEE 802.15.4 standard protocols are considered. With the implementation of the wireless HNCP home network system, a simple analysis about coexistence between IEEE 802.11b and IEEE 802.15.4 is achieved. Through the implemented wireless HNCP home network system and the analytical results about the coexistence between both two different wireless protocols, the feasibility of the wireless HNCP home network system is shown.

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A multiple PLC wireless communication module using master-slave control concept (Mastey-Slave 개념을 이용한 PLC용 다대다 통신 모듈 개발)

  • 박종석;현웅근;김이곤
    • 제어로봇시스템학회:학술대회논문집
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    • pp.48-48
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    • 2000
  • We developed a wireless communication system for multiple instrumentation system. The developed system has a function of remote instrumentation and PLC(Programmable Logic Controller) control. The system consists of CC(Control and Communication) protocol, wireless media access and physical media system. For multiple wireless communication, we propose a hub polling protocol based on master-slave control concept. To show the validity of the developed system, several experiments are illustrated.

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Design of Multiple Channel Wireless Remote Control System for Unmanned Vehicle (무인차량용 다중채널 무선원격 제어시스템의 설계)

  • Kim, Jin-Kwan;Ryoo, Young-Jae
    • Journal of the Korean Institute of Intelligent Systems
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    • v.24 no.5
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    • pp.489-494
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    • 2014
  • In this paper, a design of multiple channel wireless remote control system for unmanned vehicle is proposed. One of serious problems of the previous wireless remote control system is that it does not work when a control channel is damaged in case of emergency because it's composed of single control channel. Therefore, we propose the multiple channel wireless remote system which is composed of a portable wireless remote controller and a stationary wireless remote controller. The portable wireless remote controller and stationary wireless remote controller are designed and the multiple channel wireless remote control system for unmanned vehicles in developed. By applying to the unmanned vehicle to check its performance. The wireless remote control system is tested. Emergency stop using the portable wireless remote controller is tested when the stationary wireless remote controller is damaged. Also, emergency stop using the stationary wireless remote controller is tested when the portable wireless remote controller is damaged. The result of emergency stop test shows satisfied performance.

Remote Emergency Stop System to Improve Safety of Automated Driving Vehicle (자동주행차량의 안전성 향상을 위한 원격비상정지시스템)

  • Ryoo, Young-Jae
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.3
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    • pp.194-198
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    • 2015
  • In this paper, a remote emergency stop system to improve the safety of an automated driving vehicle is proposed. One of the most serious problems of the previous wireless remote emergency system is that it does not work when the wireless channel is damaged in case of an emergency because it is composed of a single communication channel. Therefore, the proposed remote emergency stop system composed of a portable wireless remote system and a stationary wireless remote system is designed and the remote emergency stop system for automated driving vehicles is developed. By applying it to an automated driving vehicle to check it's performance, the wireless remote system is tested. Emergency stops using the portable wireless remote system is tested when the stationary wireless remote system is disconnected. Also, emergency stops using the stationary wireless remote system are tested when the portable wireless remote system is disconnected. The results of the emergency stop test show a satisfactory performance.

Development of a Wireless Control System for Rice Transplanter of Walking Type (보행(步行) 이앙기(移秧機)를 위(爲)한 무선자동제어(無線自動制御) 시스템의 개발(開發)(I))

  • Kim, C.S.;Choi, K.H.;Kim, S.T.;Min, Y.B.
    • Journal of Biosystems Engineering
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    • v.17 no.1
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    • pp.45-54
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    • 1992
  • A wireless control system was designed and constructed to control the rice transplanter of walking type with remote control. VHF(very high freqency) was sent from wireless transmitter to wireless reciever by usig 6 channels to control main clutch, steering clutch, plant lever and throttle lever within 200 meter distance between remote control and rice transplanter. The rice transplanter with wireless control system showed good performance for accuracy of travel speed, traveling mobility and turning diameter in the concrete, paddy and dry field. It is concluded that the developed wireless control system could be adapted to control not only conventional rice transplanters but also most of the agricultural machine by changing some parts of the control system.

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Decentralized civil structural control using real-time wireless sensing and embedded computing

  • Wang, Yang;Swartz, R. Andrew;Lynch, Jerome P.;Law, Kincho H.;Lu, Kung-Chun;Loh, Chin-Hsiung
    • Smart Structures and Systems
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    • v.3 no.3
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    • pp.321-340
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    • 2007
  • Structural control technologies have attracted great interest from the earthquake engineering community over the last few decades as an effective method of reducing undesired structural responses. Traditional structural control systems employ large quantities of cables to connect structural sensors, actuators, and controllers into one integrated system. To reduce the high-costs associated with labor-intensive installations, wireless communication can serve as an alternative real-time communication link between the nodes of a control system. A prototype wireless structural sensing and control system has been physically implemented and its performance verified in large-scale shake table tests. This paper introduces the design of this prototype system and investigates the feasibility of employing decentralized and partially decentralized control strategies to mitigate the challenge of communication latencies associated with wireless sensor networks. Closed-loop feedback control algorithms are embedded within the wireless sensor prototypes allowing them to serve as controllers in the control system. To validate the embedment of control algorithms, a 3-story half-scale steel structure is employed with magnetorheological (MR) dampers installed on each floor. Both numerical simulation and experimental results show that decentralized control solutions can be very effective in attaining the optimal performance of the wireless control system.

Applicability of Bluetooth and ZigBee in Wireless Networked Control System (무선 네트워크 제어시스템에서의 블루투스와 지그비의 적용 가능성)

  • Park, Jung-Il
    • IEMEK Journal of Embedded Systems and Applications
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    • v.13 no.1
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    • pp.9-15
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    • 2018
  • This paper describes the applicability of Bluetooth and ZigBee networks for real-time control in wireless networked control system and suggests an effective usage of them. The Bluetooth SCO link, SPP and HID profiles and the ZigBee non-beacon enabled network are analyzed and the latency of them are measured. A number of wireless networked control system experiments are performed via DC motor control system and the various profiles of Bluetooth and ZigBee in real-time wireless networked control system are compared.

A Mechanism of Clock Synchronization for Wireless Networked Control System (무선 네트워크 제어 시스템을 위한 클럭 동기화 메커니즘)

  • Do, Trong-Hop;Quan, Wenji;Yoo, Myungsik
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38B no.7
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    • pp.564-571
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    • 2013
  • Wireless network has been used in many applications due to its advantages such as convenience, mobility, productivity, easy deployment, easy expandability and low cost. When it comes to stability, wireless network still shows its limitation which makes it difficult to be used for real-time control system. One of the first problems of using wireless network for control system is clock synchronization. There have been synchronization schemes proposed for wired networked control system as well as wireless network. But these should not be applied directly in wireless network control system. In this paper, we point out the importance of clock synchronization in wireless network control system. Then based on the characteristic of wireless networked control system, we propose a clock synchronization scheme for it. Furthermore, we simulate our scheme and compare with previous synchronization scheme in wired and wireless environments.

Performance Improvement of Air Conditioner Network System using Wireless Sensors Through System Performance Index and Dynamic Power Distribution Control (시스템 성능 지수 및 동적 전력분산 제어를 통한 무선센서를 이용한 에어컨 네트워크 시스템의 성능 개선)

  • Choi, Ho-seek;Kwon, Woo-hyen;Yoon, Byung-keun
    • Journal of Sensor Science and Technology
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    • v.28 no.1
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    • pp.64-70
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    • 2019
  • Wireless sensors have been developed in numerous ways for enhancing the convenience of installation, management and maintenance of sensors. Energy harvesting wireless sensors, which can collect energy from the external environment for permanent usage without the need of recharging and exchanging batteries, have been developed and employed used in Internet of Things and at various industrial sites. Energy harvesting wireless sensors are significantly affected by the sensor lifespan to sudden variation in the external environment. Furthermore, reduction in the sensor operating timespan can greatly affect the characteristics of the devices connected through a network. In this paper, a system performance index is proposed that can comprehensively evaluate the lifespan of a solar cell wireless sensor, determine the characteristics of devices connected to the associated network, and recommend dynamic power distribution control for improving the system performance index. Improvement in the system performance index was verified by applying the proposed dynamic power distribution control to an air conditioner network system using a solar cell wireless sensor. Obtained results corroborate that the dynamic power distribution control can extend the lifespan of the incorporated wireless sensor and reduce the air conditioner's power consumption.