基于MCGS的CSR真空连锁控制系统设计

介绍了MCGS工控组态软件,并以之构建了CSR真空连锁控制系统和系统的总体结构,相关软硬件和MCGS下设备驱动程序设计．实践证明该系统开发周期短．可靠性高,具有较好的可移植性和可扩充性。     

基于FPGA的CSR高频控制系统相位求解模块设计

CSR高频控制系统需要对高频正弦波激励信号的幅度、相位、频率进行稳定控制。相位arctan(Q/I)求解是必不可少的模块。论述了一种新的基于FPGA平台和对称查找表法(SBTM)的求解相位arctan(Q/I)的方法,做了详细的理论分析,给出了具体实现的代码和结果。该模块精度高,消耗资源少,可直接应用于CSR高频控制系统。     

BEPCⅡ储存环真空控制系统

北京正负电子对撞机重大改造工程(BEPCⅡ)的储存环真空控制系统是基于分布式实时控制软件EPICS架构设计的。真空控制系统负责储存环真空数据的采集、监测和真空阀门的联锁控制,确保真空设备维持超高真空状态。该系统自2006年11月初投入运行至今,一直工作稳定。     

FPGA在CSR主环电源控制系统中的应用

论文介绍了基于DSP和FPGA主环电源控制系统的设计.DSP与DAC之间通过FPGA连接,并通过FPGA来控制DAC的输出.重点介绍FPGA的程序设计及其仿真结果.系统达到了设计要求,已成功应用于CSR主环控制系统.     

基于ARM和DSP的CSR主环电源控制系统

介绍了基于删和DSP的CSR主环磁场电源控制系统的设计和开发.系统以以太网作为连接各个单元的传输介质,以删板卡作为以太网中的一个通信节点,由DSP板卡完成实际的电源控制.实验表明控制效果良好,超过了预期的设计目标.     

基于应用可编程逻辑器件的真空联锁保护控制系统

本文给出了国家同步辐射实验室光束线真空保护的控制原理,以及该光束线真空联锁保护控制的逻辑及要点.与此同时也给出了应用可编程逻辑器件(CPLD)来实现此真空联锁保护控制系统的方法,使真空联锁保护系统的响应速度与可靠性得到提高.     

ADS注入器Ⅱ真空控制系统设计

ADS注入器Ⅱ真空控制系统是基于分布式实时控制软件EPICS架构设计的。采用基于数据流设备的通信驱动模块StreamDevice、CSS和JDBC等技术,实现对现场真空设备的远程网络监控和设备状态历史数据查询。对EPICS设备层控制接口采用IOC驱动模块StreamDevice实现,可满足真空计、离子泵、PLC等加速器装置中常用的串口,及以太网口智能设备的网络监控。整个控制系统实现了对加速器真空设备的远程采集、监测和真空阀门的联锁控制,保证束流的稳定运行。     

HIRFL真空远程控制系统设计

为满足HIRFL-CSR工程对HIRFL真空系统的要求,达到远程监测控制的目的,提高整体运行效率,设计实现了一套这样的远程控制系统。文章简要介绍了以MSP430F149为核心设计的真空控制模块,及其在HIRFL真空远程控制系统中的应用。着重介绍了控制模块的硬件组成以及软件控制程序设计。该系统通过Intranet网络连接各种设备,实现了对HIRFL真空系统的远程监测与控制。     

CSNS真空控制设备监测与信息管理系统的研制

中国散裂中子源(CSNS)真空控制系统采用横河PLC和MOXA嵌入式串口设备实现真空阀门的开关和真空度的采集及相关联锁保护。本文使用CSS建立了CSNS真空控制设备及真空状态实时监测的操作员界面（OPI）。在此基础上,通过开发CSS插件,连接控制线缆数据库,实现了被控信号与被控设备及线缆的在线关联查询功能,通过被控信号即可确定设备位置和连接的线缆,方便日后的维护运行。     

HIMM离子源测试平台控制软件设计

HIMM离子源控制系统基于以太网分布式控制,控制软件基于Visual C++设计实现。详细介绍控制系统的基本结构、工作原理、联锁报警、图形界面设计方法。针对真空系统、电源系统、冷却水系统等子系统的联锁要求,设计实现了联锁保护功能。束流调试结果验证了控制系统的稳定性和可维护性以及快速的反应时间和高精度的数据处理。     

基于串行收发器的加速器电源数字控制器研究

为满足强流重离子加速装置（HIAF）对电源控制器多版本兼容和高精度控制性能的要求,研发了1套基于串行收发器的加速器电源数字控制器（APSDC）。该控制器采用基于总线互联的模块化设计架构,在保证加速器电源数字控制器高精度控制性能的前提下,兼具多版本兼容能力。设计了1套基于串行收发器的高速同步数据总线（HSB）用于数字控制器子板间数据通信,总线带宽达2 Gbps,且板间数据同步误差低于1 ns。电源上线运行实验结果表明,APSDC各项设计指标符合HIAF对电源的高精度控制及其他关键性能的技术要求,并具备较强的系统扩展性。     

Output-feedback load-following control of nuclear reactors based on a dissipative high gain filter

Due to the existing serious climate and environment problems caused by burning fossil fuels, nuclear energy is now under rapid development. It is clear that power-level control technique for nuclear reactors is significant for not only regular operation but also vital safety issues. Nowadays, most of the existing nuclear power plants are regulated by the conventional control system. However, the development in computer technology, information processing, and control theory in the past decades allow the applications of advanced controllers with higher performance. In this paper, the separation principle for the recently established dissipative high gain filter (DHGF) is presented, which guarantees the closed-loop stability of the system interconnected with a state-feedback controller and the DHGF. Moreover, the feasibility of applying the DHGF to the load-following control of nuclear reactors is verified. Finally, the DHGF with a well designed state-feedback power-level controller has been successfully applied to realize the load-following control for a nuclear heating reactor (NHR). Numerical simulation results show the high performance of the DHGF and the feasibility of the DHGF-based dynamic output feedback controller, and influence of the observer gain to the control and observation performance is also analyzed.     

重离子加速器磁铁电源控制系统研制

重离子加速器通过一定周期的磁场对带电粒子进行约束,磁铁电源是产生所需磁场的关键部件,因此,要求磁铁电源控制系统具备高效性、稳定性、精确性。磁铁电源需按加速器运行周期进行响应运行。重离子加速器磁铁电源的时序必须严格按重离子加速器控制系统的控制时序进行控制。本工作研制了重离子加速器磁铁电源控制系统,通过磁铁电源控制器与同步时钟系统的通信进行控制时序的运行;通过与中央数据库的数据通信获取磁铁电源控制器所需的全部数据(如同步事例数据、波形数据等)。同步时钟信号一旦触发,磁铁电源控制器进行相应的数据获取并进行插值运算输出至磁铁电源进行控制。重离子加速器磁铁电源控制系统同步精度为1μs,实验平台测试控制器平台纹波精度为100ppm,能满足重离子加速器实验运行的要求。     

基于NSGA-Ⅱ算法的核反应堆功率LQG控制器设计

反应堆功率控制系统的设计与核电厂的安全性和经济性息息相关。为提高其功率控制性能,本研究以某压水堆核电厂为研究对象,建立了其非线性动态数学模型,推导了其状态空间模型;采用线性二次型高斯（LQG）最优控制方法,设计了堆芯功率控制器;进一步基于遗传算法NSGA-Ⅱ对LQR权重系数进行了多目标优化;将本文所设计的控制器与传统PID控制器进行了典型工况的仿真对比。结果表明,与传统PID控制器相比,基于NSGA-Ⅱ方法优化的LQG控制器不但响应快速、控制精度高、稳定性好,而且具有良好的鲁棒性,能获得更优越的堆芯功率控制效果。     

Design and application of an EPICS compatible slow plant system controller in J-TEXT tokamak

J-TEXT tokamak has recently implemented J-TEXT COntrol, Data Access and Communication (CODAC) system on the principle of ITER CODAC. The control network in J-TEXT CODAC system is based on Experimental Physics and Industrial Control System (EPICS). However, former slow plant system controllers in J-TEXT did not support EPICS. Therefore, J-TEXT has designed an EPICS compatible slow controller. And moreover, the slow controller also acts the role of Plant System Host (PSH), which helps non-EPICS controllers to keep working in J-TEXT CODAC system. The basic functionalities dealing with user defined tasks have been modularized into driver or plug-in modules, which are plug-and-play and configured with XML files according to specific control task. In this case, developers are able to implement various kinds of control tasks with these reusable modules, regardless of how the lower-lever functions are implemented, and mainly focusing on control algorithm. And it is possible to develop custom-built modules by themselves. This paper presents design of the slow controller. Some applications of the slow controller have been deployed in J-TEXT, and will be introduced in this paper.     

A New Method for Low Sensitivity Design of a Controller for a Load Following BWR Power Plant

A new method has been proposed in which the controller is approximated by two low order models, the second being the sensitivity model of the first. Thus a Kind of piecewise solution is proposed in which the system retains the same order irrespective of the number of parameters to be considered for low sensitivity design. The usefulness of the proposed technique is illustrated in the controller design for a direct cycle BWR power plant of 457 MW(thermal) with recirculation control. The mathematical model includes the reactor kinetics, hydrodynamics of the recirculation loop, pressure transients, and the load frequency control system. The response of system variables such as frequency, neutron power, and reactor pressure are plotted with the low sensitivitty controller. The sensitivity function of frequency has been plotted using the conventional and proposed low sensitivity controller for 20 per cent variation in parameter values. The method is specifically recommended for controller design of large size systems.     

基于千兆以太网的CSNS RCS射频分布式控制系统架构

中国散裂中子源(China Spallation Neutron Source,CSNS)快循环同步加速器的射频系统的远程控制系统采用基于千兆以太网的分布式体系结构,其软件架构使用国际加速器界广泛使用的开源软件工具EPICS(Experimental and Industrial Control System)进行开发。系统主要由CPCI低电平控制器、高功率四极管放大器和偏流源机器状态监控网络、联锁保护系统、中控中转服务器和人机交互界面组成。论文主要介绍了该系统的基本功能和拓扑结构,以及各个组成部分软硬件的设计和实现。     

H∞ Loop Shaping Control for Plasma Vertical Position Instability on QUEST

QUEST has a divertor configuration with a high and a negative n-index, and the problem of plasma vertical position instability control in QUEST is still under extensive study for achieving high efficiency plasma. The instability we considered is that the toroidal plasma moves either up or down in the vacuum chamber until it meets the vessel wall and is extinguished. The actively controlled coils (HCU and HCL) outside the vacuum vessel are serially connected in feedback with a measurement of the plasma vertical position to provide stabilizing control. In this work, a robust controller is employed by using the loop synthesis method, and provides robust stability over a wide range of n-index. Moreover, the gain of the robust controller is lower than that of a typical proportional derivative (PD) controller in the operational frequency range; it indicates that the robust controller needs less power consumption than the PD controller does.     

Study and Design a Strategy to Control High-Voltage Power Supply Based on PSM Technology on J-TEXT Tokamak

To energize the gyrotrons of the electron cyclotron resonance heating system, high-voltage power supply (HVPS) at 100 kV/60 A was built on J-TEXT tokamak. The HVPS was based on pulse step modulation (PSM) technology. This power supply has many advantages, including low energy storage and a short protective time in the event of a short circuit fault. In this study, we analyze and compare several common control strategies for PSM power supply. To enhance dynamic performance, the improved queue-up PSM control strategy was proposed. The control algorithm was generated using a controller based on parallel card interface extensions for instrumentation (PXI) technology, which conforms to the control, data access, and communication standard of the ITER. This controller also operates the modules of switch power supply. Experimental results show that the control system is effective and that the PXI controller can rebalance the output voltage and frequency in 60 μs when the module malfunctions under the improved system. Furthermore, the algorithm for the PXI controller is easy to develop and does not require much resources.     

Design and optimization of fuzzy-PID controller for the nuclear reactor power control

This paper introduces a fuzzy proportional-integral-derivative (fuzzy-PID) control strategy, and applies it to the nuclear reactor power control system. At the fuzzy-PID control strategy, the fuzzy logic controller (FLC) is exploited to extend the finite sets of PID gains to the possible combinations of PID gains in stable region and the genetic algorithm to improve the ‘extending’ precision through quadratic optimization for the membership function (MF) of the FLC. Thus the FLC tunes the gains of PID controller to adapt the model changing with the power. The fuzzy-PID has been designed and simulated to control the reactor power. The simulation results show the favorable performance of the fuzzy-PID controller.