共查询到20条相似文献,搜索用时 93 毫秒
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基于LabVIEW DSC的双机热备的通用实现 总被引:1,自引:0,他引:1
介绍了一种基于LabVIEW DSC开发环境的监控软件双机热备功能的通用实现方案.利用UDP协议、事件驱动机制和状态机,使双机互相监测对方状态,并根据状态完成双机监控程序控制权限的切换,从而实现监控软件的双机冗余热备的功能. 相似文献
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实时数据库系统双机热备机制设计与实现 总被引:1,自引:0,他引:1
双机热备计算机系统可实现高任务可靠性,广泛应用于电力系统.针对实时数据库系统提出了一种新颖的双机热备设计技术,基于系统及资源状态检测与监控、双机状态一致性同步、网络通信协议、主备切换机制、数据镜像服务等关键技术实现了模块设计.主控模块对主备服务器工作状态进行仲裁与检测,网络通信模块检测服务器故障,切换控制模块实时响应服务器故障进行切换,配置模块对双机信息进行设置,保证了系统高可靠性持续运行. 相似文献
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研究一类多品种工件到达的传送带给料加工站系统(CSPS)的前视距离(Look-ahead)优化控制问题,以提高系统的工作效率.在工件品种数增加的情况下,系统状态规模会呈现指数性增长,考虑传统$ Q $学习在面对大规模离散状态空间所面临的维数灾难,且难以直接处理前视距离为连续化变量的问题,引入了RBF网络来逼近$ Q $值函数,网络的输入为状态行动对,输出为该状态行动对的$ Q $值.给出RBF-$ Q $学习算法,并应用于多品种CSPS系统的优化控制中,实现了连续行动空间的$ Q $学习.针对不同的品种数情况进行仿真分析,仿真结果表明,RBF-$ Q $学习算法可以对多品种CSPS系统性能进行有效优化,并且提高学习速度. 相似文献
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从多传感器信息融合的原理出发,提出了一种基于"两步定位"的工件智能检测方法.第1步利用视觉转动惯量法对任意放置在CMM工作台上的工件状态进行定位和定向;第2步利用测量离散点和其在模型上投影点之间的关系,采用伪逆算法原理,通过伪矩阵构造和点匹配两个过程的反复迭代,求取工件坐标系和设计(CAD)坐标系之间准确的转换关系.该算法具有快速性和鲁棒性. 相似文献
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针对状态反馈闭环系统中的传感器故障容错控制问题,先基于稳定多项式分解导出该容错控制问题状态反馈闭环系统稳定的充分必要条件.在此基础上,基于相容非线性方程组数值解法,提出具有传感器故障容错控制的状态反馈律设计方法.还基于数值优化解方法,提出面向闭环系统极点配置的另一状态反馈容错控制律设计方法.计算机仿真算例表明此方法的有效性. 相似文献
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Sang Xiaoyue Yuan Zhaohui Yu Xiaojun Sadiq Muhammad Tariq Liang Na Naseer Noman Xiao GaoXi 《International Journal of Control, Automation and Systems》2021,19(7):2431-2443
International Journal of Control, Automation and Systems - The surface temperature of workpieces in a multi-temperature zone sintering furnace is an important parameter to characterize the... 相似文献
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Long-range predictive control of a quartz chamber furnace used in microelectronic technology is discussed. It is based on a technique called rapid thermal processing (short thermal cycles, reaching high temperatures for a short time). The furnace temperature and the electric power supplied to the furnace are selected as controlled and control variables, respectively. The control algorithm is based on the minimization of a quadratic criterion involving the input and output traektng errors- it is derived in the receding-horizon sense. To represent the complex dynamics of the furnace, a single input/output controlled autoregressive integrating moving average model (CARIMA) was adopted. The model parameters are estimated on-line using a robust identification scheme which includes data normalization, covariance matrix factorization, adjustable forgetting factor, etc. Experimental results are included which demonstrate the capability of the adaptive control algorithm considered with rapid thermal processes. 相似文献
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对蓄热式加热炉的诸多优势以及国内连续加热炉的蓄热式技术改造和十年应用情况做了简要介绍,将蓄热式加热炉的核心技术分成蓄热箱技术,自动燃烧控制技术,钢温预报和炉温优化技术四大部分,分别进行了介绍。为了研究解决蓄热箱废气温度过高的问题,通过微元法、能量平衡法以及传热学经典公式等手段对蓄热箱建模。模型对蓄热箱做了一些合理简化,并且用Matlab仿真来研究蓄热箱的各过程量的变化规律,得到了气体流量、换向时间、换向占空比的确定方法。仿真结果表明模型能使废气温度保持在设定值。 相似文献
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Multivariable temperature measurement and control system of large-scaled vertical quench furnace based on temperature field 总被引:1,自引:0,他引:1
A temperature control system of 31m vertical forced air-circulation quench furnace is proposed,which is a kind of equipment critical for thermal treamlent of aluminum alloy components that are widely used in aerospace industry. For the effective operation of the furnace, it is essential to analyze the radial temperature distribution of the furnace. A set of thermodynamic balance equations modeling is established firstly. By ufilizmg the numerical analysis result to modify the temperature measurements, the control accuracy and precision of the temperature are truly guaranteed. Furthermore, the multivariable decouplmg self-learning PID control algorithm based on the characteristics of strong coupling between the multi-zones in the large-scaled furnace is implemented to ensure the true homogeneity of the axial temperature distribution. Finally, the redundant structure composed of industrial control computers and touch panels leads to great improvement of system reliability. 相似文献
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基于PLC技术的锻造加热温度控制系统 总被引:1,自引:0,他引:1
工件的加热过程通常采用人工控制的方式,这种方式存在很多不足,不仅浪费了人力资源,而且极易使工件出现过热或过烧的现象,加工过程的可靠性极低.为了克服以上不足,从控制锻造温度的角度出发,设计了一种以PLC为核心部件的锻造工件自动检温和自动送料系统.详细阐述了控制系统的总体设计思想,并分别介绍了软硬件的设计过程、模糊PID自整定控制器的设计和组态界面的建立.实际应用结果表明,本系统在提高锻件的成品率方面表现良好,大大降低了工件损耗和能耗,系统具有很强的实用性,为其他温度控制系统的改进提供参考依据. 相似文献
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采用热线法的高温粉体材料导热系数自动测试仪 总被引:2,自引:0,他引:2
利用matlab对系统进行辨识、建模和降维后得到电阻炉的模型,然后依据该模型进行仿真寻优确定采用单片机模糊PID控制程序控制电阻炉的温度,进而使系统快速升温后保持所需初始恒温;在此初始恒温基础上利用热线通以恒流产生一个阶跃温度激励信号,系统自动采集该阶跃响应信号,并求取导热系数;采用模糊PID控制算法,缩短了测试周期,提高导热仪的测试效率,由于选择虚拟仪器平台,提高了测量处理的自动化和智能化程度;经试验证明,应用此测试仪可较大提高高温粉状材料的导热系数的测试精度与效率。 相似文献
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加热炉在油田集输系统中有着广泛的应用。因运行时间长,其经济燃烧指标的高低直接影响着油田的生产成本。为实现加热炉出口参数的最佳调节及其经济燃烧,针对加热炉多变量、非线性、大滞后等特点,采用神经网络模型辨识的方法,建立了以加热炉为被控对象的神经网络正、逆模型,并且构成了神经网络内模自校正控制仿真系统。仿真研究表明,只要恰当地选择神经网络正、逆模型的结构和辨识数据的长度等参数,实现加热炉神经网络内模自校正控制的结果是令人满意的。 相似文献
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In this paper, a software technology for improving the machining accuracy in contour milling is discussed, in which the continuous path control is thoroughly investigated from the viewpoint of system synthesis, and the computer numerical control is effectively used. It is shown that the proposed “real-time cutter path rectification” offers an effective means to overcome the serious problem of the thermal deformation of workpieces. In this case, it is necessary to take many factors into consideration; the diversity of shapes, the change of cutting conditions, the unstable thermal situation, and so on. Therefore, the adaptive control is applied to compensate the thermal displacement of the contour during the cutting process. Relating to this subject, the effective cutter radius, which depends on cutter wear, is also evaluated in real-time operation; and the cutter diameter compensation is included in the “cutter path rectification”. In order to assure the machining accuracy, a new approach to contour measurement is proposed, in which the continuous path control by CNC system is used. It is certified through some experiments that the method proposed in this paper is useful to realize the flexible automation with high machining accuracy. 相似文献