The distributed control and data system in HT-7 tokamak

Luo, Junhua; Wang, H.Z.; Ji, Zhenshan; Zhu, Lei; Wang, F.; Shu, Yantai

doi:10.1109/tns.2002.1003785

Cited by 20 publications

(9 citation statements)

References 7 publications

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“…To try to get a better idea of the impact of P2P on performance we are working to modify and install a P2P testbed on the existing HT-7 tokamak data system [9]. Future work includes doing more detailed and accurate measurements on various subsystems and networks, building more P2P testbeds, and applying simulation and analysis techniques to optimize the P2P-based EAST Data System.…”

Section: Discussionmentioning

confidence: 99%

P2P-based data system for the EAST experiment

Shu

Zhang

Chen

et al. 2005

14th IEEE-NPSS Real Time Conference, 2005.

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A peer-to-peer (P2P) -based EAST Data System is being designed to provide data acquisition and analysis support for the EAST superconducting tokamak. Instead of transferring data to the servers, all collected data are stored in the data acquisition subsystems locally and the PC clients can access the raw data directly using the P2P architecture. Both on-line and off-line systems are based on Napster-like P2P architecture. This allows the peer (PC) to act both as a client and as a server. A simulation-based method and a steady-state operational analysis technique are used for performance evaluation. These analyses show that the P2P technique can significantly reduce the completion time of raw data display and real-time processing on the on-line system, and raise the workload capacity and reduce the delay on the off-line system.

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Section: Discussionmentioning

confidence: 99%

P2P-based data system for the EAST experiment

Shu

Zhang

Chen

et al. 2005

14th IEEE-NPSS Real Time Conference, 2005.

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“…According to the basic requirements of PSM power source, we design the control system which is shown in Figure 3 [6] [7]. The human-machine interaction interface is compiled by the DELPHI language based on windows XP, through which the operator can set the operation mode and parameters using the computers inside or outside the control room.…”

Section: The Compositions Of the Control System Of Psm Power Source Umentioning

confidence: 99%

The Design of PSM-Based ECRH Power Supply Control System

Zhang¹,

Xu²,

Wei³

et al. 2016

JPEE

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Electron cyclotron resonance heating (ECRH) system is one of the most important Tokamak auxiliary heating methods. However, there are growing demands for ECRH system as the physical experiments progress which meanwhile adds the difficulty of designing and building the control system of its power source. In this paper, the method of designing a control system based on Single Chip Microcomputer (SCM) and Field Programmable Gate Array (FPGA) is introduced according to its main requirements. The experimental results show that the control system in this paper achieves the conversion of different working modes, gets exact timing, and realizes the failure protection in 10us thus can be used in the ECRH system.

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“…Due to nonlinear behavior of this device caused by nonlinear electrical force, squeezing film damping, mid-plane stretching and other geometrical nonlinearities, some complicated phenomena have been seen in the dynamic behavior of resonators. Nonlinearities also may lead to chaotic behavior [2]. Haghighi and Markazi [3] used Melnikov analysis method to predict chaos in MEMS resonators.…”

Section: Introductionmentioning

confidence: 99%

Chaos prediction in nano-resonators based on nonlocal elasticity theory

Nahvi

Maleki

2018

MATEC Web Conf.

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Abstract. By decreasing the thickness of micro-and nano-beams, classical continuum theory is not accurate to predict the static and dynamic response due to the absence of length scale parameter. In this paper, nonlocal elasticity theory is used to detect chaos in nano-resonators. In this way, first mode shape of the nano-beam is found and Galerkin method is used to convert the governing partial differential equation to an ordinary differential equation. Melnikov method is used to determine the critical value of AC actuation voltage resulting chaotic motion. Effects of nonlocal parameter and beam thickness on the stability region of the resonator are investigated. It will be shown that increasing the nonlocal parameter and decreasing the beam thickness increases the difference between stability regions obtained by classical and nonlocal theories. Moreover, increasing the nonlocal parameter decreases the nonlinear stiffness and increases the critical actuation voltage which may lead to chaotic motion.

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The distributed control and data system in HT-7 tokamak

Cited by 20 publications

References 7 publications

P2P-based data system for the EAST experiment

P2P-based data system for the EAST experiment

The Design of PSM-Based ECRH Power Supply Control System

Chaos prediction in nano-resonators based on nonlocal elasticity theory

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