文档介绍：摘要摘要徐辉(核能科学与工程专业) 指导老师:单家方研究员低杂波电流驱动(LHCD)是一种重要的托卡马克等离子体非感应电流驱动和改善等离子体约束的技术。电流驱动效果不仅与微波功率有关,也与天线主波导之间的相位差有很大关系。相位反馈控制系统是低杂波系统中极为重要的一个子系统,它通过调节天线各主波导间的相位差,改善低杂波与等离子体的耦合效率, 方便地得到特定的微波功率谱以满足实验要求。,提出利用正交方法检测相位,设计了一种新型的相位检测装置,以及基于此检测装置和计算机的相位反馈控制软件系统。论文介绍了低杂波相位反馈控制系统的设计方案与实现,从总体架构设计入手,首先介绍了硬件系统的结构,包括相位检测装置、数字移相器、相位驱动放大器等硬件组成部分,其次介绍了相位反馈控制软件系统的设计,包括人机界面设计与各功能模块的实现以及多机通信,最后笔者在搭建的实验台上对该系统进行了功能测试,并提出了系统完善和改进的方法。从测试结果看,低杂波相位反馈控制系统的软硬件设计均符合设计要求,在相位的采集、检测与反馈控制方面均实现了预想的效果。关键词:低杂波,电流驱动,反馈控制,相位差 Abstract Abstract XuHui(Nuclear Science&Engineering) Directed byJiafang Lower hybrid current drive(LHCD)is one ofthemost efficient method for non—inductive current drive infusion devices and allimportant auxiliary means to obtain plasma with improved effect of the current drive is dependent on not only microwave power but also itsgrill phase (Feedback control system fortheantennaphase difference)is very important on the LHCD controlling thephase difference ofthe antenna directly、Ⅳith PDAC system(Phase Data Acquisition and Control system which isused tocontrol thephasedifference),it call improve thecouple efficiency ofLHW(10wer hybrid wave)and plasma,and get thespecial power spectrum tomeet the experiment demands. In order tofulfillthe control requirement ofantennaphase difference on LHCD system,a new fast FCSAPD hasbeen present this high-speed control system,a new phase detecting method calledIQ detection is applied and anew real—timesoftware structure based on QNx OS isintroduced. Hardware subsystem andsoftware subsystem buildFCSAPD ofLHCD. Hardware subsystem ismade up ofphase detecting device,digital—shifter,driving amplifier and other subsystem introduces modularization engineering,and itconsistsofGUI design,feedback control module,10 testmodule, communication module and SO on. Atlast,a testofFCSAPD based on theLHW experimental bench ispresented. The