CIESC Journal ›› 2013, Vol. 64 ›› Issue (7): 2543-2549.DOI: 10.3969/j.issn.0438-1157.2013.07.032

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Characteristics based parameter identification for hyperbolic distributed systems and its application in flue gas desulfurization process

FAN Liting, WANG Fuli, LI Hongru   

  1. School of Information Science & Technology, Northeastern University, Shenyang 110004, Liaoning, China
  • Received:2012-10-09 Revised:2013-04-23 Online:2013-07-05 Published:2013-07-05
  • Supported by:

    supported by the National Natural Science Foundation of China (61074074)and the National Basic Research Program of China (2009CB320601).

基于特征线法的一阶双曲型分布参数模型辨识及其在烟气脱硫过程中的应用

范丽婷, 王福利, 李鸿儒   

  1. 东北大学信息科学与工程学院, 辽宁 沈阳 110004
  • 通讯作者: 范丽婷(1981- ),女,博士研究生
  • 作者简介:范丽婷(1981- ),女,博士研究生。
  • 基金资助:

    国家自然科学基金项目(61074074);国家重点基础研究发展计划项目(2009CB320601)。

Abstract: More and more nonlinear distributed parameter model described by partial differential equations have been directly adopted in advanced control strategies to improve control performance.However,some model parameter is highly sensitive to the operating condition that regularly changes.A novel characteristics based identification algorithm was proposed for estimating the time-varying parameter for a class of hyperbolic distributed model.Based on the method of characteristics,the partial differential equation (PDE)was transformed into a system of ordinary differential equations (ODEs).According to the analytical expression of the state variable,the model parameter was optimized and updated iteratively based on the latest measurable data sequence.Simulation results showed that the proposed identification algorithm achieved good performance and the time-varying parameters could rapidly converge to its true values.The experimental application on a circulating fluidized bed scrubber achieved an average prediction error within ?6.5%,which provided the basis to implement advanced control strategies with mechanism model described by partial differential equations.

Key words: distributed parameter system, method of characteristics, parameter identification, circulating fluidized bed, flue gas desulfurization

关键词: 分布参数系统, 特征线法, 参数辨识, 循环流化床, 烟气脱硫

CLC Number: