吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (2): 583-590.doi: 10.13229/j.cnki.jdxbgxb201702033

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基于尿素选择催化还原系统的氨覆盖率非线性降维观测器设计

赵靖华1, 2, 3, 胡云峰1, 3, 高炳钊1, 陈虹1, 3   

  1. 1.吉林大学 汽车仿真与控制国家重点实验室,长春 130022;
    2.吉林师范大学 计算机学院,吉林 四平 136002;
    3.吉林大学 通信工程学院, 长春 130022
  • 收稿日期:2016-01-04 出版日期:2017-03-20 发布日期:2017-03-20
  • 通讯作者: 胡云峰(1983-),男,讲师.研究方向:汽车发动机控制.E-mail:huyf@jlu.edu.cn
  • 作者简介:赵靖华(1980-),男,在站博士后,副教授.研究方向:发动机尾气排放控制.E-mail:zhaojh08@mails.jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(61374046,61520106008); 吉林省教育厅“十三五”科学研究项目(吉教科合字[2016]第223号).

Design of nonlinear reduced-order observer for ammonia coverage based on urea-SCR systems

ZHAO Jing-hua1, 2, 3, HU Yun-feng1, 3, GAO Bing-zhao1, CHEN Hong1, 3   

  1. 1.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;
    2.College of Computer, Jilin Normal University, Siping 136002, China;
    3.College of Communication Engineering, Jilin University, Changchun 130022, China
  • Received:2016-01-04 Online:2017-03-20 Published:2017-03-20

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摘要： 针对尿素选择性催化还原(urea-SCR)系统氨覆盖率状态变量不可测量问题,在输入-状态稳定性理论(ISS)框架下设计了一款降维观测器。为保证观测器误差动态的鲁棒性,将温度、废气流量传感器测量等模型误差看作外部扰动,在ISS理论框架下进行了分析。为了提高观测器对噪声的鲁棒性并减少估计的静态误差,本文通过线性矩阵不等式(LMI) 和凸优化得到了尽可能小的观测器增益。在enDYNA精确发动机模型的FTP75测试循环下进行了瞬态仿真,与普通的机理观测器对比表明,本文提出的降维观测器对外界干扰和参数不确定性具有更强的鲁棒性。

关键词: 人工智能, 降维观测器, 非线性, 输入-状态稳定性, 氨覆盖率估计

Abstract: For ammonia coverage of urea-SCR systems, whose state is not measurable, a reduced-order observer method based on Input-to-state Stability (ISS) is proposed. The errors of sensor measurement including temperature, exhaust gas flow rate are considered as additional disturbance inputs. The observer is designed in order that the error dynamics is input-to-state stable, and the guideline for selecting the controller parameters is given. The transient performance of the proposed observer is tested on an validated enDYNA diesel model with urea-SCR aftertreatment systems. Comparing with common mechanism observer, the proposed observer has better performance.

Key words: artificial intelligence, reduced-order observer, nonlinear, input-to-state stability(ISS), ammonia coverage estimator

中图分类号: 

  • TP273
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