31m大型立式挤压淬火炉温度智能控制系统
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摘要
高强度铝合金是生产航天、航空飞行器的蒙皮、大梁、机翼等受力构件的主要材料。在高强度铝合金的生产过程中淬火是其最重要的热处理工序之一。淬火炉温度控制的精度直接影响到锻件的质量,影响锻件后续工序的进行。
     对于大型淬火炉这种大时间常数多输入、多输出、强耦合的非线性系统,很难建立控制对象的精确数学解析模型。事实证明,基于精确数学模型的双闭环PID控制系统和预测控制等算法都达不到要求的炉温控制精度,其超调量甚至高达3%以上,无法满足大型航空锻件热处理要求。
     针对被控对象的特点,本文提出了采用工控机(或触摸屏)和PLC两级计算机控制系统方案,通过对淬火炉内温度场分布情况的分析和计算,建立了被控对象的数值分析模型,较准确地掌握炉内温度场分布情况,用以优化温度控制系统的参数。在此基础上引入模糊控制算法,并充分吸收专家经验,提出了一种基于温度场的智能模糊PID控制算法。通过精确计算电热元件的占空比,采用脉冲宽度调制(PWM)方法,经PLC调节各调功柜输出功率,从而实现对淬火炉温度的精确控制。
     本系统已经投入工厂运行,实际运行结果表明:系统硬件设计合理,软件功能完善,操作、维护方便,运行可靠,控制精度高,完全满足低超调快速升温、精确保温、温度分布均匀的生产工艺要求,提高了铝材产品的性能和产量。
High intension aluminium alloy is stress mechanism's main material of spaceflight aerocraft's coating, beam girder, wing. Quench is one of the most important heat treatment processes of high intension aluminium alloy's production. So the quench stove's temperature control precision is the direct reason of forge pieces' quality, it will infect the forges' subsequent handling.
    Aiming at the problem that the temperature of the large-size vertical quench stove, for its thermal inertia is great, its delayed time is long, the coupling influence is severe, and its exact mathematical model is difficult to be established. The fact shows that based on precise mathematics model's double loop-locked PID control system and predicted control algorithms don't meet the temperature control's precision, its' overshoot even over 3%, so it doesn't satisfy large scale spaceflight forge pieces' heat treatment.
    Aiming to controlled device's feature, two-stage computer control system composes of industrial control computer (or touch screen) and PLC is showed in this paper, through analyzing and calculating the quench stove's temperature field's distribute condition, and establish the controlled device's mathematic analysis's model, rather precious grasp the stove's temperature distribute condition, then use it to optimize temperature control system's parameters. We import fuzzy control algorithm and sufficient absorb experts' experiences, put forward one intelligent fuzzy PID control algorithm based on temperature field. Through precious calculate electrothermal's on-off ratio, and adopt pulse width modify (PWM) method, adjust every power cabinet's output power through PLC, and then realize the quench stove's precious control.
    This system is already bringing into service, the applied results prove that the system's hardware is reasonable, software's function is perfect, convenient to upkeep and operate, the system is credibility, and achives the high precious, and low overshoot, fast heating-up, precious temperature-keeping and the stove's temperature distribute is even requirement, and raise the output and quality of aluminium material.
引文
[1]今村次男。航空航天用结构材料的现状与动向.轻金属,1999,(49):302.
    [2]管鄂编.淬火新技术.上海科学技术出版社,1987.
    [3]吴光英,吴光治等编著.新型热处理电炉.国防工业出版社,1993.
    [4]吴光治编著.热处理炉进展.国防工业出版社,1998.
    [5]宋扶轮编著.热处理炉温度测量与控制.国防工业出版社,1984.
    [6]高升.真空热处理炉的发展概况[J].工业加热,1998,(1):1~4.
    [7]吴为民,王仁丽.温度控制系统的发展概况[J].工业炉,2002,24(2):18~20.
    [8]田秀华,杨顺.几种温度控制方法的特点及应用[J].自动化与仪表,2001,16(6):62~63.
    [9]丁辉,张莉莉编译.国外模糊控制理论和技术的发展概况.国外情况报道,3~4.
    [10]胡社教,徐晓冰,杨柳.温度控制仪表的模糊PID控制[J].合肥工业大学学报,1998,(10).
    [11]向文圆,蔡宁生.基于BP神经网络的蒸汽温度控制[J].自动化仪表,2000,(12):4.
    [12]郑明方.管式裂解炉温度神经网络优化控制[J].江苏石油化工学院学报,1999,(10):40.
    [13]黄耀军,周云,严国平.VUDL及其在温度系统中的应用[J].电子与自动化,1999,(3):6.
    [14][美]F.P:因克罗普拉,D.P.德威特著,陆大有等译.传热基础.宇航出版社,1987.
    [15]刘高典编著.温度场的数值模拟.重庆大学出版社,1990.
    [16]王魁汉编著.温度测量技术.东北工学院出版社,1991.
    [17]蔡自兴著.智能控制基础与应用.国防工业出版社,1998.
    [18]陈国呈编著.PWM变频调速技术.机械工业出版社,1999.
    [19]诸静等著.模糊控制原理与应用.机械工业出版社,1995.
    [20]黄泽铣编著.热电偶原理及其检定.中国计量出版社,1993.
    [21]应浩.关于模糊控制理论与应用的若干问题[J].自动化学报,2001,24(4):591~592.
    [22]陈建勤,席裕庚,张钟俊.模糊控制的现状与发展[J].上海交通大学学报,1996,30(2):71~76.
    [23]崔涛,赵莉.模糊控制理论和应用的发展概括[J].自动化仪表,2002,23(7):1~3.
    [24]Juang, Chia-Feng;Chen, Jung-Shing. A recurrent neural fuzzy network controller for a temperature control system. IEEE International Conference on Fuzzy Systems, 2003, (1):408~413.
    [25]Xue, Zhengyu;Liu, Jinping;Zhu, Bo;Zhang, Hengxi;Zhang, Min.The intelligence integral fuzzy controller. Proceedings of the World Congress on Intelligent Control and Automation (WCICA), 2002, (1): 400~401.
    [26]Kaehler, Steven D. Applying fuzzy logic in a complex temperature control system. Proceedings of SPIE - The International Society for Optical Engineering, 2002, (4787): 218~231.
    [27]Sobol, Wojciech; Korwin, Michel J; Goraczko, Michel; Balazinski, Marek. Fuzzy logic
    
    control of industrial heat treatment furnaces. Annual Conference of the North American Fuzzy Information Processing Society- NAFIPS, 1999: 839~843.
    [28] Scholten, Anno. Fuzzy logic control. CSI Control Systems Int, Carrollton, TX, USA, 1995, (12):5~9.
    [29] Gao, Zhiqiang;Trautzsch, Thomas A; Dawson, James G. A stable self-tuning fuzzy logic control system for industrial temperature regulation. IEEE Transactions on Industry Applications, (38), March/April, 2002:414~424.
    [30] Guan, Xuezhong;Liu, Tienan;Qu, Hongquan Application of fuzzy control theory to direct-heating furnace control system. Proceedings of the World Congress on Intelligent Control andAutomation(WCICA), 2002, (1):396~399.
    [31] Zhao, Yongrui; Chen, Zonghai. An expert fuzzy controller used for silit tube pipe furnace with high temperature. Proceedings of the World Congress on Intelligent Control and Automation (WCICA), 2000, (3): 1675~1677.
    [32] Lau, Henry; Wong, T.N. Fuzzy expert system for complex closed-loop control: A non-mathematical approach. Expert Systems, 1998, 2(15) :98~108.
    [33] Wang, Wenshun;Wan, Rui. Application of fuzzy inference compound method to resistance furnace temperature control system. Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics, 1998, 2(1 24): 165~169.
    [34] Gan, Fangcheng; Zhao, Wangda; Xu, Zhisheng; Li, Yan. Temperature fuzzy control system for fire experiment furnace based on the safety of building structure. Process in Safety Science and Technology Part B, 2002, (3): 1251~1255.
    [35] Isaka, Satoru. Fuzzy temperature controller and its applications. Proceedings of SPIE-The International Society for Optical Engineering, 1993, (2061):59~65.
    [36] Zeng, Shuiping; Zhang, Qiuping; Wu, Liancheng; Ma, Zhiju. Fuzzy inference of temperature for aluminum production. Light Metals :Proceedings of Sessions, TMS Annual Meeting (Warrendale, Pennsylvania), 2001 : 1187~1192.
    [37] Yoshii, Shuichi. Fuzzy control system developed for hot stove of blast furnace. IHI Engineering Review (English Edition), 3 (23), Jul, 1990: 104~108.
    [38] Moon, Un-Chul; Lee, Kwang Y. Temperature control of glass melting furnace with fuzzy logic and conventional PI control. Proceedings of the American Control Conference, 2000, (4): 2720~2724.
    [39] 朱彤,任庆昌.PID-模糊控制的应用探讨[J].电气传动自动化,2002,24(3):11~13.
    [40] 张持健,王元航,方明星等.高精度模糊PID控制器及其在温度控制中的应用.自动化仪表,2002,23(7):21~23.
    [41] 蔡锦达.PLC与触摸屏在玻璃钢缠绕过程中的应用[J].制造业自动化,2002,2(24):5~6.
    [42] 刘燕.触摸屏与PLC的通信与连接.自动化与仪器仪表,2002,(4):36~37,43.
    [43] EasyBuilder 500使用手册,人机电子有限公司,2001.
    [44] 刘飞,须文波.单片机Fussy-PID双模温控仪[J].电子与自动化,1996,(4):10.
    
    
    [45]徐建林,陈超.模糊控制在热处理电阻炉中的应用研究.Hot Working Technology,2002,(5):58~59,61.
    [46]周璇,贺建军,喻寿益,桂卫华.基于温度场分布的空气循环淬火炉智能控制系统.过程控制科学技术与应用,2002,242~246.
    [47]贺建军,王春归,喻寿益.人工智能模糊控制在大型淬火炉温度控制中的应用.冶金自动化,2004,1.
    [48]高飞,薛忠.模糊控制技术中的几个问题.西安电子科技大学学报,1998,3(25):359~373.
    [49]陈书瀚.智能模糊控制在工业炉窑自动化中的应用.控制理论应用,1996,2:31~33.
    [50]陈志旺,朴春俊。模糊控制在退火炉炉温控制中的应用.信息技术,2002,(8):34~35,70.
    [51]吴建国.模糊控制在电炉炉温控制中的应用.基础自动化,1995.1:12~15.
    [52]刘斌,方康玲,蒋峥.温度预测模糊控制系统.武汉科技大学学报,2000,1(23):90~92.
    [53]李云峰,赵宇.可编程序控制器(PLC)在高频淬火机床中的应用.自动化仪表,2001,2(16):49~50.
    [54]韩生廉,胡国四,王建桥.模糊控制的特征及其必须解决的课题.控制与决策,1998,5(13):559~562,570.
    [55]陈大庆.工业触摸屏与可编程控制器的实时通讯.青岛建筑工程学院学报, 1999,3(20):67~71.
    [56]王虹,贾胜利,姚学礼,张红军编著.Visual Basic 6.0实用教程.人民邮电出版社,1999.
    [57]清源计算机工作室编著.Visual Basic6.0开发宝典.机械工业出版社,1999.
    [58][美]Evangelos Petroutsos,Kevin Hough著邱仲潘等译.Visual Basic 6.0高级开发指南.电子工业出版社,1999.
    [59]Microsoft Corporation著,微软(中国)有限公司译.Microsoft Visual Basic6.0中文版语言参考手册,1998.
    [60]SIMATIC S7-200可编程序控制器系统手册.西门子(中国)有限公司自动化一部,2001.
    [61]西门子S7 PLC系统、维护和编程集成课程(上).自动化与驱动培训中心,2001.