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李鲁平 《计算机测量与控制》2018,26(3):220-223
在钻杆生产过程中焊缝热处理是极为重要的一道工序,该工序用来实现钻杆焊缝的热处理工艺,通过热处理使钻杆达到预期的强度。如果该工位没有热处理温度的采集和记录,对热处理工艺检查会造成很大困难,同时也不能保证加工工艺的实施,对钻杆质量和事故分析产生很大影响。经过现场调研研究,钻杆焊缝热处理工序增加温度采集和记录功能,可以实现温度监控和历史数据的追溯,对产品质量的保证和使用过程中产品问题的追溯具有重大意义。针对钻杆焊缝热处理的温度监控和数据的可追溯性问题,经过对温度信号的分析研究,提出使用PID调节器实现温度焊缝热处理温度的控制,同时采用PLC技术实现各个温度信号的采集和处理功能,结合WinCC和SQL-server实现温度信号的实时显示和数据记录,该方法很好的实现了钻杆焊缝热处理温度的采集和记录。 相似文献
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非接触式红外人体温度测量技术 总被引:1,自引:0,他引:1
红外辐射测温技术已广泛应用到医学中,用它来测量体温简便、迅速、准确率高。本文概述了红外测温仪的基本原理、特点以及在人体温度测量上的应用。 相似文献
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在许多工业领域,非接触式测温仪已成为有改进产品质量的重要工具,非接触式测温仪无需接触被测物体,只测量其在0.7-1.4μm,电磁频谱区域发出的红外辐射。由于这种这一特性,非接触式测温仪通常和于测量运动的、不发近的或一接触就会损坏的物体, 用于温度极高的物体的测温。Raytek双色测温仪是一种高速、高效、耐用的新一代智能红外测温仪。在极其恶劣的环境中,如空气中有烟雾、灰尘、蒸汽和闰,以及目标不充满视 相似文献
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在设备维护、质量管理、工艺流程和节能方面,Wahl 公司生产的 Heat Spy 测温仪是一种实用的、性能稳定的温度测量仪器。它对塑料、破璃、钢材、水泥、纸浆和纸、食品、电子器件等大多数对象均能随时测量其温度。1.Heat Spy 测温仪的工作原理所有的固体在绝对零度以上都要辐射红外能,而辐射能的大小同物体或目标的温度成比例。如图所示Heat Spy 测温仪通过固定焦距的透镜组把这些能收集到敏感的检测器上,并直接读出温度(℃)。因为此种仪器收集的是光速传播的辐时能,并且检测器的质 相似文献
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智能厂房温湿度控制系统 总被引:4,自引:0,他引:4
首先分析了厂房温湿度控制与一般建筑物空调系统的区别,指出现在流行的空调控制方法不适合厂房温湿度控制;接着提出一种智能温度控制方法,它不需要确定系统的数学模型,用专控制的方法,在不同控制阶段分别采用开关控制,模糊控制和智能PID控制;最后介绍了实行结果。 相似文献
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This article presents a novel three-loop control system, which supplements control structures known from the literature as model following control (MFC). The major advantage of the proposed system is its high robustness to process parameter variations; it is much higher than that offered by single-loop or two-loop control systems. Features of the new structure are revealed by a theoretical analysis that has been carried out from the viewpoint of requirements for a force/pose controller of a Stäubli RX60 manipulator. This article shows how the proposed control structure responds to such strong process parameter variations and makes a comparison to results yielded by single-loop control structures. 相似文献
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模型跟踪广义预测鲁棒自适应控制器 总被引:5,自引:1,他引:4
本文采用滤波CARMA模型,基于内模原理,提出了一种新的广义预测鲁棒自适应控制器,并分析了闭环系统性能,在新的控制器中,引入适当的前馈作用,使得跟踪和调节问题解耦,利用部分状态跟踪、模型参考以及极点配置方法解决跟踪问题,利用多步预测滚动优化方法解决调节问题;适当选择滤波器可以保证对平稳随机扰动有满意的响应,减少可调参数对闭环系统响应的影响,增强系统对未建模动态的鲁棒性,仿真结果表明:该控制器对确定性和非平稳随机扰动具有不变性,对系统时延和阶次变化具有鲁棒性,适用于非最小相位和开环不稳定系统。 相似文献
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Robust containment control in a leader–follower network of uncertain Euler–Lagrange systems 下载免费PDF全文
A distributed controller is developed that yields cooperative containment control of a network of autonomous dynamical systems. The networked agents are modeled with uncertain nonlinear Euler–Lagrange dynamics affected by an unknown time‐varying exogenous disturbance. The developed continuous controller is robust to input disturbances and uncertain dynamics such that asymptotic convergence of the follower agents' states to the dynamic convex hull formed by the leaders' time‐varying states is achieved. Simulation results are provided to demonstrate the effectiveness of the developed controller. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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一种专家智能控制器的仿真研究 总被引:1,自引:0,他引:1
该文提出一种专家智能控制器(简称为EI控制器).该控制器的参数可基于专家知识和过程参数的变化实时进行调整。仿真结果表明对于工业过程中的大纯滞后、非线性、变参数特性能获得较为满意的调节效果。 相似文献
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Juan Garrido Francisco Vázquez Fernando Morilla 《International journal of systems science》2016,47(5):1054-1072
This paper presents a new methodology to design multivariable proportional-integral-derivative (PID) controllers based on decoupling control. The method is presented for general n × n processes. In the design procedure, an ideal decoupling control with integral action is designed to minimise interactions. It depends on the desired open-loop processes that are specified according to realisability conditions and desired closed-loop performance specifications. These realisability conditions are stated and three common cases to define the open-loop processes are studied and proposed. Then, controller elements are approximated to PID structure. From a practical point of view, the wind-up problem is also considered and a new anti-wind-up scheme for multivariable PID controller is proposed. Comparisons with other works demonstrate the effectiveness of the methodology through the use of several simulation examples and an experimental lab process. 相似文献
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本文提出一种新型的分散式自适应鲁棒机器人控制方案。它主要解决以下诸方面的问题:1)减少在线计算量;2)通过设置一个非线性观测器来及时修正模型信息,以适应负载及其他因素变化的需要,进而有效地减少所需控制值(尤其当系统处于平稳工作状态时,效果更加明显),相应地,也就减少了系统工作时的动能损耗。这一点对[1]中提出的机器人分散式变结构控制算法有较大改进;3)对系统的不确定性和扰动作用具有鲁棒性。 相似文献
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Jorge Diaz-Salgado Jesus Alvarez Alexander SchaumJaime A. Moreno 《Journal of Process Control》2012,22(1):303-320
The robust feedforward (FF) output-feedback (OF) control problem of (possibly open-loop unstable) continuous exothermic jacketed reactors with isotonic kinetics with respect to reactant concentration is considered. The volume, temperature, and concentration must be regulated by manipulating the feed, exit and coolant flowrates on the basis of volume and temperature measurements. The problem is addressed as an interlaced controller-observer design within a constructive control framework. The result is a quasi linear-decentralized (qLD) FF-OF dynamic controller which: (i) recovers (up to observer convergence) the behavior of a robust nonlinear FF-SF controller, (ii) has closed-loop stability conditions coupled with conventional-like tuning guidelines, and (iii) constitutes an add-on to the PI control scheme commonly employed in industrial reactors. The approach is tested with an open-loop unstable reactor example through simulations. 相似文献