PDF全文下载:2016050567
程换新, 于沙家, 张国庆
(青岛科技大学 自动化与电子工程学院,山东 青岛 266061)
摘要: 循环流化床烟气脱硫(CFB-FGD)技术是目前应用比较广泛的脱硫方式,由于CFB-FGD系统是个复杂的非线性系统,很难建立其数学模型,而模糊建模被证明在非线性系统的建模中具有很大优势,因此本工作提出了CFB-FGD系统的T-S模糊建模。本工作通过分析CFB-FGD系统的基本原理和工艺流程,以及实际操作过程中的控制参数,对此系统中烟气出口温度控制回路进行研究,并对其控制回路建立了T-S模糊模型。建立系统的T-S模糊模型之后用鲁棒竞争算法进行辨识,为了简化模糊规则在所有简化方法中采用正交最小二乘法,这样获得的T-S模型具有较高的建模精度和泛化能力。最后通过仿真验证了所建立的CFB-FGD系统中的主要控制回路模型具有很好的动态响应,能够很好地逼近实际系统。
关键词: CFB-FGD系统; T-S模糊建模; 鲁棒竞争算法; 正交最小二乘法
中图分类号: X 701.3文献标志码: A
T-S Fuzzy Modeling for CFB-FGD System
CHENG Huanxin, YU Shajia, ZHANG Guoqing
( College of Automation and Electronic Engineering, Qingdao University Of Science and Technology, Qingdao 266061, China)
Abstract: Circulating fluidized bed flue gas desulfurization (CFB-FGD) technology is widely used in desulfurization. CFB-FGD system is a complex and nonlinear system, so it is difficult to establish the mathematical model. Fuzzy modeling has great advantages in nonlinear system modeling, so this paper proposes a CFB-FGD system modeling based on T-S fuzzy model. By analyzing mechanism and process of the circulating fluidized bed for flue gas desulfurization and the control parameters CFB-FGD process operation,We studied CFB-FGD system main control circuit (flue gas outlet temperature control loop), and established control circuit about T-S fuzzy model. Robust competitive algorithm is used to identify the established T-S model and orthogonal least squares method is used to for simplify fuzzy rules.The kind of model offers a high precision and generalization ability. Finally, the simulation results show the established CFB-FGD system main control loop model has a good dynamic response, and it can be a good approximation of the actual system.
Key words: CFB-FGD system; T-S fuzzy modeling; robust competitive algorithm(RCA); orthogonal least squares(OLS) method
收稿日期: 20150909
基金项目: 山东省自然科学基金项目(ZR2013FL012);新疆科技支疆项目(201591103).
作者简介: 程换新(1966—),男,教授.
文章编号: 16726987(2016)05056706; DOI: 10.16351/j.16726987.2016.05.018