【作者】 褚志强；

【导师】 凌跃胜；

【作者基本信息】 河北工业大学 ， 电机与电器， 2002， 硕士

【摘要】 目前，80年代引进的玻璃窑炉自控生产线，技术相对落后，特别是用于生产玻璃棉制品的玻璃窑炉，对料道液位和温度控制精度要求很高。因此改造现有的国内窑炉控制系统有着巨大的现实意义。 本文通过对固安宏远玻璃棉制品有限公司玻璃窑实际技改项目的深入分析，在控制系统选择，参数整定，最优燃烧及良好的人机界面四个方面进行了探讨。对控制系统中常见的单回路和串级控制系统，本文借助于仿真软件MATLAB进行了研究，发现串级控制系统改善了被控对象的动态特性，提高了系统抗一次干扰和二次干扰的能力，对副回路参数变化有一定的自适应能力。对过程工业控制中应用最多的PID控制器参数的整定方法，进行了仔细的比较和研究。 燃烧控制是实现窑炉优化控制的基础，而燃烧控制的核心是空燃比控制。影响空燃比的因素很多，通过对窑炉生产过程的分析，最终确定天然气热值、负荷变化、炉子的自然状况及生产中的异常情况等四个方面作为影响空燃比的主要因素。在上述分析的基础上，本文采用预补偿和变步长模糊自寻优相结合的方案来控制空燃比，使得过剩空气系数始终保持在最佳值。使用组态软件(组态王6．0)设计了玻璃窑炉自动控制系统，并为用户提供了良好的人机界面。 通过改造可以提高劳动生产率、节约能源、改善劳动条件、保护环境卫生和提高市场竞争力。该项目研究成功，将会带来明显的社会效益和经济效益，有者巨大的现实意义。更多还原

【Abstract】 At present, the glass furnace automation produce line imported in 1980s draggle relatively, especially to glass rurnace which is exigent to control precision of feeder liquid level and temperature. Therefore it has immense real significance in reconstructing the civil glass rurnace control system.On the basis of analysing practical reconstruction project of Gu’an Hongyuan fiberglass Ltd., this paper discuss choice of control system, adjustment of controller parameter, optimum combustion and the design of a good interface. Via modern simulation software MATLAB, we study on simple loop and cascade control system and find cascade control system can improve controlled object’s dynamic characteristic, advance ability of resist disturb and enhance self-adaption ability to subsidiary loop parameter movement. Moreover this paper discuss how to tune pid controller’s parameter.Realizing furnace optimum control is based on combustion control, and that combustion control key is air fuel ratio control. Routine air fuel ratio control adopt manual control, which has become furnace optimum control choke point. Many factors have influence on air fuel ratio. On the basis of analysis of furnace produce process, we take natural gas’s heat value, change of load, status of furnace and abnormity instance as four main factors which have influence on air fuel ratio. On the basis of analysis, to make surplus air coefficient always hold in optimum value, we adopt method of combining precompensation with the step adjustment fuzzy self-optimize to control air fuel ratio. Moreover we design the glass furnace automatic control system and provide good man-machine interface by configuration software (kingview 6.0).The technical transformation can advance labor productivity, save energy, improve labor condition, protect environment and advance competition .It will bring about obvious society efficiency and economic efficiency and has immense real significance更多还原