共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
文章介绍了酒钢中板加热炉的燃烧控制系统,重点介绍了双蓄热室加热炉的换向控制系统、温度燃烧控制系统,针对温度燃烧系统的温度信号干扰,进行了数字滤波处理,对于炉膛温度控制系统的大滞后,采取了智能积分及抗积分饱和措施。 相似文献
4.
目的提高包装机械热封机构的温度控制精度,以保证包装效率和产品质量。方法针对包装塑料薄膜热封的温度控制,基于单神经元自适应PID控制算法设计一种自动包装机热封温度控制系统。介绍自动包装机热封的基本原理,阐述单神经元自适应PID控制算法的基本原理,并设计一种温度控制器。基于模糊集理论,实现控制器比例、积分和微分系数学习速率的在线调整。基于ARM Cortex-M3和PIC单片机搭建自动包装机热封温度控制系统。结果将该热封温度控制系统应用于自动包装机中,可以将热封温度误差控制在合理的范围内。结论通过仿真验证了文中所述自动包装机热封温度控制系统稳定性较好,具有一定的抗干扰、自适应、自调整能力。 相似文献
5.
针对已有的温湿度检定箱温度控制系统深入分析其技术水平、工作原理及影响因素。提出了一种优化温湿度检定箱温度控制系统的动态行为的新方法,并在实验中验证了该方法的有效性。进而对温湿度检定箱的稳定性进行改善,为温湿度计校准提供更准确和可靠的测量环境。 相似文献
6.
为了使多喷头多色3D打印设备快速实时地进行温度采样,确保数据的正确传输,并对所测温度场精确控制,研发了一种基于PID算法的八路高精度温度控制系统.通过硬件设计和软件设计,完成了PID算法在八路温度控制系统中的应用.对八路温度控制系统的测试表明,基于PID算法的八路温度控制系统有较好的控制效果和较高的精度. 相似文献
7.
聚变堆液态金属锂铅实验回路温度测量与控制方法探索 总被引:2,自引:0,他引:2
液态金属锂铅实验回路是研究聚变堆液态金属包层技术独一无二的实验平台.为了探索锂铅回路高温锂铅温度测量与控制方法,对316L不锈钢管道进行加热,并设计了其温度控制系统,以测试K型铠装热电偶不同工作端形式的测温效果.发现同一截面处露端式热电偶温度测量比接壳式(或绝缘式)更接近于实验设定温度,其温度曲度波动小.因此采用露端式热电偶测温方法及加热温控和数据采集系统应用于中国第一个热对流锂铅实验回路DRAGON-I,其温度测量和控制系统完全满足锂铅回路的要求. 相似文献
8.
9.
以最小方差性能评价基准为基础,结合火力发电厂热工控制系统的特点,以单回路系统和过热蒸汽温度的串级控制回路系统为代表,进行单回路控制系统与串级控制系统控制性能评价的方法推导。 相似文献
10.
本文针对烘丝温度控制系统的特性,利用非线性内模控制原理,提出了一种根据烟丝干燥过程中各阶段温度的不同变化趋势,其对应的温度控制器的设计方法,仿真结果表明,该方法是十分有效的。 相似文献
11.
12.
为了将电子束应用于精密构件及热敏感性材料钎焊,以适应复杂形状曲线钎焊缝的要求,采用电子束扫描轨迹编辑及在线调节、钎焊温度实时采集及PID控制器构建真空电子束钎焊温度闭环控制系统.研究表明:本控制方法可实现在焊接过程中电子束按设定轨迹对工件进行扫描加热的同时,对被加热工件温度进行在线检测及实时调节.采用电子束扫描轨迹编辑及在线调节可以适应各种形状曲线钎焊缝、特殊材料及热敏感性材料的钎焊要求;只要适当选取PID参数,采用PID控制器可以对钎焊温度进行有效控制.该方法提高了电子束钎焊温度控制的精确性和适应性,有利于钎焊质量的提高. 相似文献
13.
目的 研究先进充液成形设备的精度控制技术,以满足充液成形过程中对成形介质压力及侧推油缸位置的高精度控制要求,并确保模具型腔的密封性和零件成形的稳定性。方法 基于PLC控制器下的PID闭环控制功能,将速度闭环和位置或压力闭环进行集成,开发应用于液压系统的双闭环控制方法。结果 使用双闭环控制方法,可以调整侧推油缸的位置控制精度及响应速度,并将精度控制在0.1 mm以内,也可调整增压装置的输出端压力控制精度,使精度达到0.3MPa。结论 在利用充液成形设备进行液压成形的过程中,双闭环技术可以实现设备侧向密封的精确位置控制以及型腔内压力的精确控制。 相似文献
14.
针对随机智能梁结构参数的不确定性建立了其闭环控制动力响应随机模型.从结构动力响应的Duhamel积分出发,利用求解随机变量函数矩法导出了在三种情况下横向位移、转角位移和应力响应的数字特征表达式.并通过算例分析了在随机荷载作用下控制前后其物理参数、几何参数和控制力对闭环结构系统动力响应的影响.结果表明基于随机方法处理压电... 相似文献
15.
介绍了闭环色彩控制系统的产家和工作原理,详细介绍了唯一在中国使用的QTI公司的色彩控制系统(CCS)的构成、在线色彩控制和检测方法,探讨了它在商业轮转机上的应用,以及给生产带来的便利和有待改善的方面. 相似文献
16.
复叠式螺杆压缩机组的变频控制 总被引:1,自引:0,他引:1
介绍复叠式螺杆压缩机组的自动控制装置及其控制方法。变频控制装置主要由变频器、触摸屏和控制器组成。控制器采集系统压力,以闭环控制方式实现高温压缩机的变频调速,这种控制方法可以使制冷压缩机组应用工况的范围更广,且能量调节效率高,节能效果好。 相似文献
17.
Exploring the Use of Design of Experiments in Industrial Processes Operating Under Closed‐Loop Control
下载免费PDF全文
![点击此处可从《Quality and Reliability Engineering International》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Francesca Capaci Bjarne Bergquist Murat Kulahci Erik Vanhatalo 《Quality and Reliability Engineering International》2017,33(7):1601-1614
Industrial manufacturing processes often operate under closed‐loop control, where automation aims to keep important process variables at their set‐points. In process industries such as pulp, paper, chemical and steel plants, it is often hard to find production processes operating in open loop. Instead, closed‐loop control systems will actively attempt to minimize the impact of process disturbances. However, we argue that an implicit assumption in most experimental investigations is that the studied system is open loop, allowing the experimental factors to freely affect the important system responses. This scenario is typically not found in process industries. The purpose of this article is therefore to explore issues of experimental design and analysis in processes operating under closed‐loop control and to illustrate how Design of Experiments can help in improving and optimizing such processes. The Tennessee Eastman challenge process simulator is used as a test‐bed to highlight two experimental scenarios. The first scenario explores the impact of experimental factors that may be considered as disturbances in the closed‐loop system. The second scenario exemplifies a screening design using the set‐points of controllers as experimental factors. We provide examples of how to analyze the two scenarios. © 2017 The Authors Quality and Reliability Engineering International Published by John Wiley & Sons Ltd 相似文献
18.
This article describes the detailed and systematic study carried out on a PV-10, piezoelectric gas admission valve for its application both in a closed loop vacuum control system and in dynamic systems. It is concluded that in the closed loop vacuum control system an optimum dc voltage is required for obtaining a set pressure for minimum pressure fluctuations in the vacuum chamber. 相似文献
19.
Template matching or correlation is an image-processing technique that searches for specific features or characteristics within an image. This paper describes the use of a configurable feature correlation method for the reliable processing of high quality digitized welding images in order to supply measurements for use with a closed loop control system. A generic approach has been adopted to produce a versatile and robust image-processing technique capable of analysing and providing measurements from images with different properties or characteristics. Low cost, commercially available image acquisition hardware was used, and the image-processing software development was undertaken using a commonly available PC-based visual programming environment. The general application of this work has been concerned with the demonstration of vision-based closed loop process control strategies for a series of different welding processes. Closing the process control loop in this manner is believed to represent a significant advancement of the vision-based remote viewing or ‘monitoring’ systems that are presently available. 相似文献
20.
This paper covers in detail the issues related to parameter estimation of open loop dynamics of fly-by-wire aircraft/control
systems from closed loop data. System identifiability aspects in the closed loop and the effect of various feedback types
on the parameterisation of the system matrices are reviewed. The methods commonly employed for the detection of collinearity
in the data are discussed. A brief discussion of the common methods used for analysis of unstable/augmented aircraft are given.
Also, controller information based identification method (CIBIM), which utilises knowledge of the controller in the analysis,
is presented. The discussion is followed by numerical results of application of the techniques to simulated data. 相似文献