The Experimental Research of the Control System of Flexible Hose Instability

The experimental control system of the superelastic hose instability is based on S7-200PLC as controller. The superelastic hoses are sealed at their both ends. The breakdown condition of that is taken as the object of study under different combined and working conditions. The upper computer of the experimental bench adopts MCGS configuration software. The test of experiment can meet the control and real-time monitoring of experimental platform conditions. In the experiment,we measure and monitor the data of temperature,tensile force,pressure and so on by the analog modules. During the process of experiment,the actuators like the solenoid valve and the motor are controlled by the switch. The paper describes that the constitution of experimental control system of the superelastic hose instability, control function and the achievement of monitoring condition. It is convenient to operate in the control system,the design cost is low,the man-machine interface is simple and understandable,and the experimental control system will be significant in bio-engineering and medical research.

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.

BNCT02加速器机器保护系统设计

中国科学院高能物理研究所第二台硼中子俘获治疗(BNCT02)加速器主要由1台离子源、1条低能束流传输线、1台射频四极加速器和3条高能束流传输线组成。为了保障BNCT02加速器的安全运行,设计了基于横河PLC和实验物理及工业控制系统(EPICS)软件工具包的机器保护系统。为了增强安全性,该系统采用了冗余设计,由两套完全独立且主要输入、输出信号一致的子系统构成。测试结果表明,BNCT02加速器机器保护系统的响应时间小于1.6 ms,且具有稳定可靠性高的特点,满足BNCT02加速器运行的需要。

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.

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.

新型侧挂式磁悬浮系统的稳定性分析

为了突破磁悬浮地球仪的传统结构,提出了一种新型的侧挂式磁悬浮系统。介绍了系统的基本结构并进行结构选型。从系统磁力分布的角度,对系统的稳定悬浮原理进行分析。建立了系统的数学模型,为了验证系统的静动态性能,对其进行阶跃位移与阶跃干扰下的控制仿真。搭建侧挂式磁悬浮系统的实验样机,对其进行稳定悬浮性能实验与位移跟踪性能实验。实验结果表明,系统存在轻微的振荡现象,但能够长时间稳定悬浮。当系统受到垂直向下0.5 N的干扰力时,在0.54 s的短暂调节后,系统仍能够保持稳定悬浮的状态,稳态位移误差不超过0.2736 mm;在垂直方向上施加0.5 mm的阶跃位移,系统能够稳定地跟随参考位移信号,响应时间为0.73 s,跟踪位移误差不超过0.4321 mm。

冲击式水轮机泥沙磨损试验测试系统研发

冲击式水轮机在多沙河流上运行时会面临十分严重的泥沙磨损问题。针对目前国内缺乏冲击式水轮机泥沙磨损研究试验系统的情况,研发了一套冲击式水轮机泥沙磨损试验测试系统。该系统由管路及供水系统、沙水池及泥沙搅拌系统、水轮机试验机组、数据采集与测控系统等部分组成,可支持最高水头800 m、最大流量300 m^(3)/h和最高水轮机转速2500 r/min的冲击式水轮机泥沙磨损和性能试验,采用可编程控制器(PLC)和LabVIEW软件可实现供水泵启停、水轮机转速调节和管路阀门自动控制,同时能实时监测水轮机转速、水头、流量等关键参数。经过试验显示该泥沙磨损试验测试系统具有精度高(达0.3%)、自动化水平高、运行稳定、操作简单以及人机界面友好等特点。

电液位置伺服控制系统设计与实验验证

针对电液位置伺服系统存在外部不确定性扰动和非线性等问题,采用基于敏感度分析(SA)和粒子群优化(PSO)的径向基函数(SAPSO-RBF)神经网络设计电液位置伺服控制系统。利用SAPSO-RBF神经网络估计伺服系统模型中的未知参数并设计伺服系统滑模控制器,同时搭建双出杆对称液压缸电液位置伺服控制系统实验装置。SAPSO-RBF神经网络滑模控制方法与传统滑模控制方法对比实验结果表明,SAPSO-RBF神经网络滑模控制方法具有更高的跟踪精度、更强的鲁棒性,并且系统抖振得到了有效抑制。

Research of refrigeration system for a new type of constant temperature hydraulic tank

Different from the traditional hydraulic oil cooling method,a new type of constant temperature oil tank cooling system based on semiconductor refrigeration technology is designed. This paper studies the principle of semiconductor refrigeration and establishes a heat transfer model. Semiconductor cooler on piping refrigeration is simulated,and influence of the parameters on the outlet temperature,such as pipe pressure difference of inlet and outlet,pipe length,pipe radius,are gotten,and then hydraulic tank semiconductor refrigeration system is proposed. The semiconductor refrigeration system can control temperature at 37 ± 1°C.

多维虚实融合的“计算机控制系统”实验教学创新实践

为提高课程教学质量,开发了多维虚实融合的多水位控制实验系统。该实验集仿真与实体实验、远程与本地实验于一体,结合了硬件与软件、系统与算法,能构成多种复杂控制对象,满足课程的实验教学需求。交替安排理论课与实验课,使实验贯穿教学全过程。通过线上线下混合教学、翻转课堂、讨论课的形式开展理论教学,由学生主导课堂。设计多种基础性实验和综合性实验,使知识点的过渡与难度的递进更平滑。采用多评价主体、多评价角度的方式使评价体系更多元全面。实践表明,该实验教学模式具有较好的教学效果。

基于沙漠治理智能小车的创新实验教学系统设计

针对教育部提出的提高高校学生的创新和实践能力,该实践教学系统依托学科竞赛,设计了沙漠治理自动化装置,将智能小车和砾石铺设装置组合在一起,通过控制系统控制智能小车的行驶轨迹,同时控制砾石铺设装置,将砾石按田字形规律铺设,达到减轻人工铺设的劳动量,提高铺设效率。该实践教学系统激发了学生的兴趣和潜能,培养了学生的科研能力和创新精神。

新时代背景下实验教学体系与模式探索——以陕西理工大学材料成型及控制工程专业为例

材料成型及控制工程专业是材料科学、成形工艺与自动控制技术的综合与交叉,是材料、机械、控制和计算机等多学科交叉融合的专业,也是典型的工程应用型专业。陕西理工大学材料成型及控制工程专业拥有40余年办学历史,经过长期建设,成为国家级一流专业建设点。伴随专业的发展,实验室建设也取得一定成效。当前材料成型及控制工程专业存在实验教学理念落后、形式单一、实际工程受限、理论及方法研究不足等问题,基于新时代背景下专业人才培养的规格要求,通过构建和完善专业实验教学体系,探索新时代背景下材控专业实验教学改革的新思路、新路径,专业构建出多方位融合的实验教学体系基本框架,提出“四个层次、六个模块、两个开放”的专业实验教学体系的培养模式,借此提高学生的工程素质,提升学生综合分析问题、解决实际问题的能力。

朔黄铁路重载列车电控空气制动试验研究

重载列车的制动技术是重载运输发展的关键。针对国内朔黄铁路,对重载列车电控空气制动系统进行试验研究,比较分析有无电控空气制动系统作用下列车制动系统的性能指标。实验结果显示:电控空气制动系统性能指标达到设计要求,在缓解车钩作用力、同步列车管及制动缸压力和缩短制动距离等方面具有明显的优势,该电控空气制动系统能够保证重载长、大列车运行的安全性。

水下控制系统测试台设计及试验研究

针对水下控制模块测试需求,文中设计了一种多功能水下控制模块测试台。水下控制模块(SCM)作为水下生产系统的核心部分,其安装成本高、难度大,且不便于在水下维护,因此,在其入水前必须对其进行严格的功能测试,确保在水下工作的可靠性。首先,对关于水下控制模块测试的相关技术和标准进行研究,得出水下控制模块在测试台上进行的测试主要包括内部静水压力测试、液压内部泄漏测试和液压系统功能测试;然后,基于被测水下控制模块的性能指标对测试台的机械结构和液压系统进行了设计,并对上述测试内容的测试方法进行了研究;最后,通过试验对测试台的测试功能进行验证。文中研究为我国设计和研制国产水下生产系统测试设备提供了宝贵经验。

基于眼科手术机器人的计算机控制系统教学实验设计

数字PID控制、最小拍控制和大林控制是计算机控制系统中的核心教学内容。目前仅有针对数字PID开展教学实验的先例,缺乏基于实际工程问题、适合最小拍控制和大林控制的实验平台。针对这一问题,提出基于眼科手术机器人的计算机控制系统实验平台,结合精准控制“机器人-视网膜”接触力这一工程背景,设计接触模型辨识、数字PID控制、最小拍控制和大林控制实验,引导学生将计算机控制系统的相关知识与工程实践相结合,提升解决实际问题的能力。

基于离散特性的飞行器姿态智能控制方法研究及实验设计

针对飞行器姿态复合控制问题研究中直接力连续化处理导致的与实际工程特性差距较大问题,研究了体现直接力离散特性的控制系统构建方法及控制参数优化设计方法。首先,搭建了体现直接力离散特性的飞行器姿态复合控制系统框架及模型;然后针对复合控制问题的非线性、强耦合、多约束等复杂特性,采用PSO算法对控制律及控制分配参数进行多目标优化设计,构建了飞行器姿态智能控制系统;再通过数字仿真从控制算法、PSO算法参数、飞行器系统参数三个方面对智能控制问题研究方法进行了说明;最后,依托最新科研成果设计开发了飞行器姿态智能控制实验系统,为自动化专业本科生智能控制类课程实践教学及创新型人才培养提供了自主开放的实验研究平台。

一种基于激光雷达探测新型安全可靠高铁站台门控系统

针对铁路动车组无列车自动驾驶(ATO)且在同一站台不同车型混合运营,现有的站台门控制系统无法识别多种车型车门位置的难题,提出基于激光雷达技术的铁路站台门控制系统。首先分析铁路多车型环境下车门位置排布信息,再利用激光雷达采集相对应的位置信息和动车组停稳信息,设计激光雷达位置跟踪控制单元,然后对站台门控制系统进行设计,最终通过实验验证。实验结果表明,该系统安全、可靠,不仅能准确识别不同动车组的车门位置且能判别动车组停稳,准确率超过98.4%,为其后铁路站台门的推广、应用提供理论和应用基础。

工程认证下控制类课程实验教学体系构建

针对控制类课程多学科交叉融合、实验之间相互独立、实验室利用率偏低等问题,通过系统化的顶层设计、虚拟教研室及共享式实验教学平台的建设,构建了突出工程教育和多学科交叉融合的实验教学体系,提升了学生解决复杂工程问题的能力,以适应工程认证下复合型工程人才培养的需求。

激光系统的指向控制实验研究

激光系统的指向控制实验研究是一个复杂而精细的过程,涉及光学、机械、电子和自动控制等多个学科领域。基于此,本文通过对激光系统的指向控制实验研究,初步探索光束自动控制的流程和关键技术。通过实际操作,掌握简单光学仪器的使用流程和操作规范,并通过实验观察和数据分析,对激光系统的指向控制形成初步认识。实验结果显示,在实验环境中,通过合适的控制措施,能够实现对激光光束的准确指向控制,从而为相关领域的应用提供技术支持和有益参考。