The application of EPICS in TMSR radiation protection and access control system

To treat technical problems of data acquisition,alarm management, and historical data archiving of radiation protection control system in Thorium Molten Salt Reactor, a network prototype system was designed based on experimental physics and industrial control system.Radiation level of many locations in Jiading campus of Shanghai Institute of Applied Physics is being continuously monitored, and boundaries of accelerator facilities and radiochemical areas are defined by the access control system. In this paper, we introduce the control system design,including human–machine interfaces, alarm system, historical data archiving system, and the software for access control. The software development followed the standard of Capability Maturity Model Integration(CMMIò) Level3, and the software had passed a third-party test, which indicated that the functionality and the reliability could fulfill the requirements of the radiation protection system.

The new control system of HLS linac and transport line

The new linac and transport line control system of Hefei Light Source (HLS) is a distributed control sys- tem based on EPICS (Experimental Physics and Industrial Control System). Industrial PC (IPC) is widely used as not only Input/Output Controller (IOC) but also device controller. Besides industrial PC, PLC and microcontroller are also used as device controllers. The software for industrial PC based device controller is developed based on VxWorks real-time operating system. The software for PLC and microcontroller are written with ladder software package and assemble language, respectively. PC with Linux and SUN workstation with Solaris are used as operator interfaces (OPI). High level control is made up of some EPICS tools and Tcl/Tk scripts.

Challenges and Requirements for the Application of Industry 4.0:A Special Insight with the Usage of Cyber-Physical System

Considered as a top priority of industrial devel- opment, Industry 4.0 （or Industrie 4.0 as the German ver- sion） has being highlighted as the pursuit of both academy and practice in companies. In this paper, based on the review of state of art and also the state of practice in dif- ferent countries, shortcomings have been revealed as the lacking of applicable framework for the implementation of Industrie 4.0. Therefore, in order to shed some light on the knowledge of the details, a reference architecture is developed, where four perspectives namely manufacturing process, devices, software and engineering have been highlighted. Moreover, with a view on the importance of Cyber-Physical systems, the structure of Cyber-Physical System are established for the in-depth analysis. Further cases with the usage of Cyber-Physical System are also arranged, which attempts to provide some implications to match the theoretical findings together with the experience of companies. In general, results of this paper could be useful for the extending on the theoretical understanding of Industrie 4.0. Additionally, applied framework and proto- types based on the usage of Cyber-Physical Systems are also potential to help companies to design the layout of sensor nets, to achieve coordination and controlling of smart machines, to realize synchronous production with systematic structure, and to extend the usage of information and communication technologies to the maintenance scheduling.

Machine learning for intrusion detection in industrial control systems:challenges and lessons from experimental evaluation

Gradual increase in the number of successful attacks against Industrial Control Systems(ICS)has led to an urgent need to create defense mechanisms for accurate and timely detection of the resulting process anomalies.Towards this end,a class of anomaly detectors,created using data-centric approaches,are gaining attention.Using machine learning algorithms such approaches can automatically learn the process dynamics and control strategies deployed in an ICS.The use of these approaches leads to relatively easier and faster creation of anomaly detectors compared to the use of design-centric approaches that are based on plant physics and design.Despite the advantages,there exist significant challenges and implementation issues in the creation and deployment of detectors generated using machine learning for city-scale plants.In this work,we enumerate and discuss such challenges.Also presented is a series of lessons learned in our attempt to meet these challenges in an operational plant.

工业控制系统网络安全防护体系建设研究

工业控制系统是国家关键基础信息系统,其安全性已提升到国家战略层面。随着工业化与信息化的深度融合,智能制造技术将打破传统的人机物协同边界,工业控制系统将直接面对来自网络的安全威胁。结合工业控制系统遭遇的网络病毒攻击事件,对照《信息安全技术网络安全等级保护基本要求》的通用要求,对工业控制系统的特性和面临的网络安全威胁进行了研究。提出了构建从通信网络、区域边界到计算环境的多层级、多层次安全防护,对网络监测运营平台和安全管理中心进行系统监控与管理的纵深防护体系。初步建成的工业控制系统网络安全防护体系经过网络安全等级保护测评与实践验证,可有效应对多种新型网络攻击、防止恶意软件的破坏、阻止恶意报文的传输,从而保护工业控制系统的安全运行。同时,工业控制系统遭遇网络病毒攻击后的应对措施及经验,对实战防御研究及防护体系的建设完善具有借鉴和指导意义。

基于油气集输半实物仿真平台的工控网络安全测试研究

由于无法在实际环境中对工业控制网络进行安全测试,提出一种基于油气集输半实物仿真平台的网络安全测试方法。该方法通过分析真实环境中工业控制网络的结构和脆弱性,构建网络安全测试模型,分别采用DoS攻击、重放攻击和虚假数据注入攻击方式对仿真平台进行网络攻击测试,并通过组态操作界面和沙盘模型对攻击效果进行验证;同时,对测试过程中出现的网络安全问题进行总结并提出了防御措施,可为工业控制网络安全防护提供重要参考。

Novel design of a personnel safety system for Hefei Light Source-Ⅱ

The Hefei Light Source-Ⅱ(HLS-Ⅱ) is a vacuum ultraviolet synchrotron light source. The personnel safety system (PSS), which is a personnel access control system, is a crucial part of the HLS-Ⅱ, as it protects the staff and users at HLS-Ⅱfrom radiation damages. The prior version of HLS-Ⅱ PSS was based on an access control system called SiPass. This lacked the personnel management function. Meanwhile, as the prior PSS is a turn-key system, it was not effective for sharing information. To overcome these drawbacks, the novel design of PSS for HLS-Ⅱ is proposed based on the Siemens redundant programmable logic controller under the Experimental Physics and Industrial Control System. The proposed PSS consists of a safety interlock system, access control system, and a radiation monitoring system. The safety interlock system is used to define the interlock logic. The access control system is designed to restrict the access of staff and users at HLS-Ⅱ, and to provide a personnel management function. The radiation monitoring system is used to monitor the radiation dose rate in both the light source and the surrounding areas. This paper details the architecture and the specific design of the novel PSS. The off-line test results demonstrate that the proposed system has achieved the design objectives.

Design and experiment of the environment control system for the industrialized production of Agaricus bisporus

Environment parameters are the main factors affecting the growth and development of Agaricus bisporus.Because of the requirements of environmental conditions for high-efficiency industrialized production of Agaricus bisporus,equipments for environment control were developed.Based on the variable operating equipment,a multi-factor fuzzy controller was designed to realize the comprehensive control of ambient temperature,humidity,CO2 concentration,and the temperature and moisture of the compost.The test results showed that the temperature control error was less than±0.5°C and the response speed was more than 0.5°C/h;The control error of ambient humidity was less than±2%RH,and the response speed was more than 9%RH per hour;The moistures at different points in compost ranged from 50%to 70%with a standard deviation of 4.04.The control accuracy of environmental CO2 concentration was within 200μmol/mol.The overall performance of the control system was stable and reliable,which could meet the requirements of environment factors for the growth of Agaricus bisporus.The system can provide technical support and reference for the automatic and precise control of the environment during the industrialized production of Agaricus bisporus.

Data-collection system for high-throughput X-ray absorption fine structure measurements

A new X-ray absorption fine structure(XAFS)data-collection system based on the Experimental Physics and Industrial Control System software environment has been established at the BL14W1 beamline of the Shanghai Synchrotron Radiation Facility. The system provides for automatic sequential analysis of multiple samples for continuous high-throughput(HT) measurements. Specifically, 8 sample pellets are loaded into an alumina holder,and a high-precision two-dimensional translation stage is programmed to switch these samples automatically for collecting the XAFS spectrum of each sample in sequence.Experimenters implement HT measurements via a graphical user interface developed with Control System Studio.Finally, the successful operation of the HT XAFS system is demonstrated by running experiments on two groups of copper–ceria catalysts, each of which contains 8 different powder samples.

如何发挥大学生物理实验竞赛在创新型人才培养中的作用

介绍了大学生物理实验竞赛的意义和第八届全国大学生物理实验竞赛的基本情况。围绕如何最大化发挥大学生物理实验竞赛在创新型人才培养中的作用,针对性地探讨了如提高大学物理实验在教学中的地位、加强实验教师资队伍建设、加强各理工学科交流和推进产学合作协同育人等探索路径。

工业信息物理系统间隙DoS攻击的自适应事件触发稳定控制

针对具有间隙拒绝服务(DoS)攻击的工业信息物理系统(ICPS),研究一种基于观测器的自适应事件触发稳定控制方案。首先构造一个观测器估计系统状态,并采用一种新的自适应事件触发通信方案以节约网络资源;然后通过受频率和持续时间限制的间隙DoS攻击对ICPS的影响建立攻击模型,将受到DoS攻击的ICPS划分为DoS攻击活跃期系统和DoS攻击休眠期系统,并用一些过去成功触发状态重构当前受到攻击的状态,得到基于动态估计器的攻击补偿机制,保证系统在DoS攻击活跃期间的渐进稳定;最后运用分段Lyapunov泛函方法、Jensen’s不等式和Schur补引理,得到系统的稳定条件,并提出自适应事件触发参数、观测器增益和控制器增益的协同设计方案。用间歇反应器系统模拟间隙DoS攻击下基于自适应事件触发的ICPS系统稳定性能。仿真结果表明,自适应事件触发策略和基于动态估计器的补偿机制不仅能够提升系统的稳定性,还能有效降低数据传输的次数,系统在静态事件触发策略下的触发次数大约是在自适应事件触发策略下的4.5倍。

A note on diagnosis and performance degradation detection in automatic control systems towards functional safety and cyber security

This note addresses diagnosis and performance degradation detection issues from an integrated viewpoint of functionality maintenance and cyber security of automatic control systems.It calls for more research attention on three aspects:(i)application of control and detection uni ed framework to enhancing the diagnosis capability of feedback control systems,(ii)projection-based fault detection,and complementary and explainable applications of projection-and machine learning-based techniques,and(iii)system performance degradation detection that is of elemental importance for today's automatic control systems.Some ideas and conceptual schemes are presented and illustrated by means of examples,serving as convincing arguments for research e orts in these aspects.They would contribute to the future development of capable diagnosis systems for functionality safe and cyber secure automatic control systems.

传导性电磁泄露波对物理隔离工业控制系统的入侵研究与分析

基于传导性电磁泄漏波仿真了针对物理隔离工业控制系统的入侵过程,检验了物理隔离系统的防护能力。研究表明,在工业控制系统电路中常见的300 kHz到50 MHz电磁波段中,通信木马发送端在不引起隔离区AI模拟量采集模块的采集值明显改变的时候隐蔽性最好;入侵电磁波信号使用15 MHz频率发起攻击时通信木马接收端接收效果最好;当被攻击的物理隔离系统的防护能力平均达到-30 dBmV时,以潜伏通信为目的而不以破坏干扰为目的的硬件木马较难通过传导性电磁泄漏波的方式发挥通信作用。

PLC虚拟实验系统中的工控组态软件设计

阐述基于工控组态软件的PLC虚拟实验系统,可编程控制系统中的工控组态软件应用,包括技术性原则、工控组态软件的实施过程,通信模块的应用,探讨工控组态软件系统的规划。

深度学习算法在工业网络安全的应用及挑战

当前,与企业互联网络连接的工业控制系统越来越多,导致其成为网络攻击的重点目标。人工智能深度学习技术可应用于保护工业控制系统网络安全。深度学习可使网络从无监督数据中学习并解决复杂问题。应用深度学习模型可提高工业网络安全应用程序的准确性、可靠性及可扩展性。本文首先描述了深度学习算法在工业网络安全应用的使用情况,主要包括卷积神经网络(CNN)、自编码器(AE)、深度置信网络(DBN)、循环神经网络(RNN)、长短期记忆(LSTM)、生成对抗网络(GAN),以及深度强化学习(DRL)深度学习技术。随后讨论了深度学习技术在工业控制系统的应用场景,最后提出了在工业控制系统应用深度学习存在的问题挑战。

EPICS控制系统软件开发环境

为了有效地管理大型科学装置控制系统的软件系统EPICS(Expefimental Physics and Industrial Control System)的开发过程,保证系统的可靠性及可维护性,本文对EPICS的开发环境进行了分析,并通过对软件管理方法、账号权限管理及开发过程的研究,提出并建立了一个统一、便捷和可靠的EPICS软件开发平台。

基于Win32 EPICS输入输出控制器的设计

本文介绍了基于Win32实验物理和工业控制系统(Expefimental Physics and Industrial Control System,EPICS)输入输出控制器(Input/Output Controller,ioc)的设计和实现,提出了EPICS IOC和微软技术的衔接方案,结合高性能数字示波器,将基于Win32的IOC很好地融入整个EPICS控制系统。

EPICS控制系统中的Oracle数据库采集

介绍EPICS(Experimental physics and industrial control system)控制系统中针对Oracle的数据库采集。深入剖析了EPICS通讯协议、Oracle联网协议,详细介绍了采集软件的体系结构和实现方法,最后对EPICS 稳定性做了测试。本文给出了采集程序对控制系统影响的测试结果和采集程序运行情况。

PLC综合实训平台的设计与实现

基于西门子系列PLC设计和实现了综合自动化实验平台,平台融入了当今工业控制网络结构,包含各层次的自动化单元,同时自制或订做了被控对象以便更好地模拟工控现场。在此基础上,探讨了基于此平台的实验教学,给出了实验项目实例。该实验平台为电气工程与自动化专业学生和研究生工业控制研究提供良好的实践环境。