• Title/Summary/Keyword: View Control

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Multi-view Rate Control based on HEVC for 3D Video Services

  • Lim, Woong;Lee, Sooyoun
    • Journal of the Institute of Electronics and Information Engineers
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    • v.50 no.8
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    • pp.245-249
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    • 2013
  • In this paper, we propose two rate control algorithms for multi-view extension of HEVC with two rate control algorithms adopted in HEVC and analyze the multi-view rate control performance. The proposed multi-view rate controls are designed on HEVC-based multi-view video coding (MV-HEVC) platform with consideration of high-level syntax, inter-view prediction, etc. not only for the base view but also for the extended views using the rate control algorithms based on URQ (Unified Rate-Quantization) and R-lambda model adopted in HEVC. The proposed multi-view rate controls also contain view-wise target bit allocation for providing the compatibility to the base view. By allocating the target bitrates for each view, the proposed multi-view rate control based on URQ model achieved about 1.83% of average bitrate accuracy and 1.73dB of average PSNR degradation. In addition, about 2.97% of average bitrate accuracy and 0.31dB of average PSNR degradation are achieved with the proposed multi-view rate control based on R-lambda model.

Speed Control of AC servo system using LabVIEW and cRIO (LabVIEW와 cRIO를 이용한 AC 서보시스템의 속도제어)

  • Yun, Ki-Hyeon;Ji, Jun-Keun
    • Proceedings of the KIEE Conference
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    • 2006.10d
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    • pp.166-168
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    • 2006
  • This paper presents a speed control of AC servo system using LabVIEW program and cRIO (Compact RIO)hardware which is a real-time controller made in National Instruments company. LabVIEW is a GUI programming language easy to implement control system and cRIO is a reconfigurable hardware platform which is very simple. Therefore Lab VIEW and cRIO will be excellent tools to design and implement control system.

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Development of automatic flow control system based on LabView (LabView를 이용한 자동유량제어 시스템의 개발)

  • Kang, Tae-Won;Kim, Du-Seob;Ann, Sung-Gyu
    • Journal of Engineering Education Research
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    • v.19 no.2
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    • pp.3-7
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    • 2016
  • A flow control system was designed and fabricated to control the flow rate of liquid through the pipe. This control system was composed of hardwares and software, hardwares as controller, gate valve, orifice meter and data aquisition board and software as National instruments Labview program. Control of flow rate was executed by adjusting the pneumatic valve located at the center of pipe line based on the control signal generated by LabView PID control algorithm, which converts analog signal measured by pressure difference of orifice to digital signal to adjust pneumatic valve. For the controller setup Ziegler-Nichols tuning technique was applied and control performances were investigated for not only the disturbance but also the set point changes. Developed system showed good control performances in flow control enough to use as teaching tool of feedback control theory and practice in university, and also as industrial application.

An Implementation of PI Controller for the Position Control of Mobile Robot Using LabVIEW (LabVIEW를 이용한 이동로봇 위치제어를 위한 PI제어기 구현)

  • Park, Young-Hwan;Lee, Jae-Kyung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.7
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    • pp.1241-1246
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    • 2008
  • The dynamics of mobile robot is nonlinear. To cope with this nonlinearity, many advanced control schemes have been proposed recently. Generally, the advanced control schemes are complicated and not good for the practical real-time control when they are implemented as control programs. So, in this paper, a relatively simple PI controller is proposed and applied to the position control of mobile robot with the adoption of reference trajectory calculation method used for the AUV(Autonomous Underwater Vehicle) control. The proposed PI controller is programmed using LabVIEW which is popular for its graphical programming characteristics. The simulation and experimental results show the feasibility and effectiveness of the proposed PI controller.

Real-Time Remote Greenhouse Monitoring and Control Using LabView (LabView를 이용한 실시간 온실 모니터링 및 원격 제어)

  • 서정희;박흥복
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.4
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    • pp.779-787
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    • 2003
  • Recently, a study on the development of remote monitoring and automation control system based on Web is spread widely. In this paper, we have expended the remote control method on the existing automation. And we proposed method to do real-time monitoring and remote control considering multimedia data processing, the expansion of TCP/IP using LabView graphical language. Also we applied the method in greenhouse environment control system. The application result was evaluated by very efficient thing to remotely monitor and control situation of greenhouse.

An Implementation of PI Controller for the Position Control of Mobile Robot Using LabVIEW (LabVIEW를 이용한 이동로봇 위치제어를 위한 PI제어기 구현)

  • Park, Young-Hwan
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2008.04a
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    • pp.259-263
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    • 2008
  • The dynamics of mobile robot is nonlinear. To cope with this nonlinearity, many advanced control schemes have been proposed recently. Generally, the advanced control schemes are complicated and not good for the practical real-time control when they are implemented as control programs. So, in this paper, a relatively simple PI controller is proposed and applied to the position control of mobile robot with the adoption of reference trajectory calculation method used for the AUV(Autonomous Underwater Vehicle) control. The proposed PI controller is programmed using LabVIEW which is popular for its graphical programming characteristics. The simulation and experimental results show the feasibility and effectiveness of the proposed PI controller.

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Optimal Motion Control of 3-axis SCARA Robot Using a Finite Jerk and Gain Tuning Based on $LabVIEW^{(R)}$ ($LabVIEW^{(R)}$ 기반 3축 스카라 로봇의 유한 저크 및 게인 동조를 이용한 최적 모션 제어)

  • Kim, J.H.;Chung, W.J.;Kim, H.G.;Lee, G.S.
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.17 no.3
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    • pp.40-46
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    • 2008
  • This paper presents the optimal motion control for 3-axis SCARA robot by using $LabVIEW^{(R)}$. Specifically, for optimal motion control of 3-axis SCARA robot, we study velocity profile based on finite jerk(the first derivative of acceleration) and optimal gain tunig based on frequency response method by using $LabVIEW^{(R)}$. The velocity optimization with finite jerk aims at generating the smooth velocity profile of robot. Velocity profile based on finite jerk is acquired and applied to 3-axis SCARA robot by using $LabVIEW^{(R)}$. DSA(Dynamic Signal Analyzer) for frequency response method is programed by using $LabVIEW^{(R)}$. We obtain the bode plot of transfer function about 3-axis SCARA robot by using DSA, and perform the gain tuning considering dynamic characteristic based on the bode plot. These experiments have shown that the proposed motion control can reduce vibration displacement and response error rate each 33.7% and 51.7% of 3-axis SCARA robot.

Robot Control integrating LabVIEW and Matlab

  • Balashov, V.S.;Skatova, D.D.;Choi, S.J.
    • Proceedings of the KAIS Fall Conference
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    • 2007.05a
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    • pp.249-252
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    • 2007
  • This study shows possibility of Matlab and LabVIEW integration for controlling of robot's manipulator. Examined approach can be used for control of complex system with intelligent control capability. Instance of Robotic System controller is described in details. Structure of control system is divided into three parts Virtual Instrument of LabVIEW, MatLab Script for solving and Matlab Simulink model for visualizing, which are explained separately. In addition, used neglects are explained and founded.

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Design of Fuzzy-PID Controller for Turbojet Engine of UAV Using LabVIEW (LabVIEW를 이용한 무인항공기용 소형 터보제트 엔진의 Fuzzy-PID 제어기 설계)

  • Shin, Haeng-Cheol;Jie, Min-Seok
    • Journal of Advanced Navigation Technology
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    • v.20 no.3
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    • pp.190-195
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    • 2016
  • In this paper, Propose to prevent compressor surge and improve the transient response of the fuel flow control system of turbojet engine. Turbojet engine controller is designed by applying Fuzzy-PID control algorithm. To prevent any surge or a flame out event during the engine acceleration or deceleration, the Fuzzy-PID controller effectively controls the fuel flow input of the control system. Fuzzy-PID results are used as the fuel flow control inputs to prevent compressor surge and flame-out for turbo-jet engine and the controller is designed to converge to the desired speed quickly and safely. Using LabVIEW to perform computer simulations verified the performance of the proposed controller. Response characteristics pursuant to the gain were analyzed by simulation.

Development of automatic flow control system for the practice of Ziegler-Nichols and Cohen-Coon control theory (Ziegler-Nichols와 Cohen-Coon 제어 이론의 실습을 위한 자동 유량제어 시스템의 구축)

  • Kang, Tae-Won;Lee, Ho-Gyun
    • Journal of Engineering Education Research
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    • v.20 no.4
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    • pp.61-66
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    • 2017
  • Automatic flow control system composed by hardware and software was designed and fabricated to be used as teaching tool of feedback control theory in university experimental class. This system includes hardwares like data acquisition board, flow measuring device, transmitters, and the pneumatic valve, and software like LabView program for the monitoring and control of flow rates. The system was designed as the student can see the control effect of not only set point but also disturbance changes. Also the LabView program was composed for the calculation of controller parameters of both Ziegler-Nichols and Cohen-Coon tuning. The students can apply both tuning constants and compare the control performances. This system will provide the easy way for the students to understand the function and specification of control hardwares, and to raise the programing ability of control software.