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本文主要介绍了低杂波分段调相技术的计算机控制系统的组成及工作原理。讨论了计算机偏差调节算法在本系统的应用。详细讲述了系统硬件及软件的构成,并给出了控制系统的程序框图。 相似文献
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1. IntroductionHT-7 superconducting tokamak Il] is a mediumsize experimental device for experiment and researchof nuclear fusion. A megawatt-grade lower hybridcurrent drive (LHCD) [21 system was constructed forit in 1996. The layout of HT-7 2.45 GHz LHCD sys-tem is shown in Fig.l. For a better operation of theLHW system, whose wave source mainly consists of12 klystron amplifiers, it is necessary to studied indetail the composition of HT-7 LHCD system andits protection systems.1.1 Mas… 相似文献
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It is well accepted that lower hybrid current drive (LHCD) is the most efficient method for non-inductive current drive in fusion devices and the effect of the current drive is dependent on not only microwave power but also its grill phase shift. This paper presents a new kind of feedback control system for antenna phase difference in LHCD experiments. In this highspeed control system, a lot of new technologies and methods are incorporated. The results of the experiments show a very good agreement with the system design. 相似文献
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基于Socket的多平台通讯研究 总被引:4,自引:0,他引:4
EAST装置中的LHCD控制系统是一个基于多平台的分布式控制系统。由于控制系统中有多种应用需求,因此在系统中采用了QNX,Linux和W indows三种操作系统。文章主要介绍了在QNX,Linux,Windows三种不同的操作系统平台下,如何通过Socket网络编程实现互相通讯,并阐述了自定义通讯协议的设计和实现。测试结果表明,利用BSDSocket API建立的套接字,可以方便地实现三个操作系统平台之间的通讯,并且在长时间、高频率的通讯过程中,具有良好的实时性和可靠性。 相似文献
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1.IlltroductionLowerhybridwave(LHW)isakindofquasi-electrostaticwaveswhichcanpropagatewithlowerhybridmodeinmagneticallyconfinedplasma.Itcanbeusedintokamakplasmapre--ionization'heatingandcurrentdrive.Lowerhybridwavesystemmainlyincludesthefollowingseveralparts:awavesourcewhichcanproducemicrowaveofhighpowerandlongpulse;adirect-currenthigh-voltagepowersupplywhichsupplieselectricpowertowavesource,afeederandantennasystemwhichdeliversthewavetotokamakplasma;acontrollingsystemwhichcontrolseachchannel's… 相似文献
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低杂波控制系统是一个分布式实时控制系统,其实验数据和运行参数对核聚变的研究具有重要的意义.但是,因为该系统结构复杂,实时性和可靠性要求高,控制对象多样,各种数据的研究需求都不相同,因此给数据管理系统的设计带来了一定的难度.该数据管理系统针对低杂波系统的数据特点,采用了双数据库平台管理数据,重点介绍了MDSPlus模型驱动数据库及其在低杂波系统中的应用,并通过测试数据证明了该设计的可行性. 相似文献
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In order to test the klystrons operated at a frequency of 3.7 GHz in a continuous wave (CW) mode, a type of water load to absorb its power up to 750 kW is presented. The distilled water sealed with an RF ceramic window is used as the absorbent. At a frequency range of 70 MHz, the VSWR (Voltage Standing Wave Ratio) is below 1.2, and the rise in temperature of water is about 30 ℃ at the highest power level. 相似文献
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