水泥联合粉磨系统的智能控制研究

发布时间：2018-05-30 04:03

本文选题：水泥联合粉磨系统 + PID控制　；参考：《济南大学》2015年硕士论文

【摘要】：水泥在我国的现代化建设中有着广泛的应用。我国水泥生产总量巨大,随之而来的是原材料的大量开发而造成的环境破坏。环境保护问题受到了全世界的广泛关注,水泥生产过程中提高原材料的利用率和水泥的生产质量也逐渐被重视。本课题的水泥联合粉磨系统就是利用智能控制系统提高原材料的利用率和水泥生产的质量,生产线采用常规控制与智能控制相结合的控制系统。此套控制系统的成功运用能够在一定程度上解决原材料利用率低等不足。本课题的研究重点是水泥生产过程中称重仓的仓重、水泥磨负荷和循环风机转速的控制方案。各个控制对象之间必须进行良好的配合才能保证水泥联合粉磨系统的正常运行。水泥联合粉磨系统结构的复杂性决定了整个系统控制变量的多样性,而系统控制变量的多样性又决定了控制策略和控制器的复杂性。本设计的主要任务就是设计出控制器,使整个联合粉磨系统工作稳定灵活,能源利用效率达到近一步优化。本课题分析了水泥联合粉磨系统各个回路之间的关系,并根据此关系设计出智能控制开关,选择不同工况下的控制策略。Bang-Bang控制对误差大的参数能够做到快速反应;模糊PID加权控制能够吸取单独的模糊控制和PID控制各自的长处,完成对称重仓回路的控制;模糊PID自整定控制则在误差允许的范围内完成对水泥磨的自动智能控制;而带Smith预估的PI控制则解决了水泥联合粉磨的滞后问题,用这种方法完成对循环风机的控制。由此四种控制的切换完成对复杂的水泥联合粉磨系统的控制。本文生产线的DCS系统采用ABB公司的AC800F系统。智能控制器用VB6.0进行编写。运用OPC接口技术,完成智能控制器与DCS系统的数据交换。通过参数的调整完成整个水泥生产过程的智能控制。
[Abstract]:Cement is widely used in the modernization construction of our country. The total amount of cement production in China is huge, followed by a large number of raw materials development caused by environmental damage. Environmental protection has been paid more and more attention all over the world. In the process of cement production, increasing the utilization ratio of raw materials and the quality of cement production have been paid more and more attention. The cement grinding system of this subject is to use intelligent control system to improve the utilization ratio of raw materials and the quality of cement production. The production line adopts the combination of conventional control and intelligent control system. The successful application of this control system can solve the problem of low utilization rate of raw materials to some extent. This paper focuses on the control scheme of the weight of the weighing bin, the load of cement mill and the rotating speed of circulating fan in cement production process. In order to ensure the normal operation of cement joint grinding system, good coordination must be carried out among each control object. The complexity of cement grinding system determines the diversity of control variables, and the diversity of system control variables determines the complexity of control strategy and controller. The main task of this design is to design the controller to make the whole joint grinding system work stably and flexibly, and achieve the further optimization of energy utilization efficiency. In this paper, the relationship between each loop of cement grinding system is analyzed, according to which the intelligent control switch is designed, and the control strategy under different working conditions. Bang-Bang control can react quickly to the parameters with large error. Fuzzy PID weighted control can absorb the advantages of individual fuzzy control and PID control to complete the control of symmetrical heavy duty loop, and fuzzy PID self-tuning control can control cement mill automatically and intelligently within the range of error. Pi control with Smith prediction solves the lag problem of cement combined grinding, and this method is used to complete the control of circulating fan. The four kinds of control are switched to complete the control of the complex cement grinding system. The DCS system of this production line adopts the AC800F system of ABB Company. The intelligent controller is written with VB6.0. The data exchange between intelligent controller and DCS system is completed by using OPC interface technology. The intelligent control of the whole cement production process is completed by adjusting the parameters.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ172.63;TP273

【共引文献】