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Ammonia coverage rate nonlinear observer design method based on synovial membrane control

A design method and coverage technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the stability requirements of the ammonia coverage observer, the complexity of the ammonia coverage observer equation, etc., to achieve simple structure and strong robustness sexual effect

Active Publication Date: 2017-06-13
JILIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current nonlinear estimation of ammonia coverage still faces the following challenges: 1. The urea-SCR system model and the ammonia coverage observer equation are too complex; 2. The stability requirements and ease of implementation of the ammonia coverage observer

Method used

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  • Ammonia coverage rate nonlinear observer design method based on synovial membrane control
  • Ammonia coverage rate nonlinear observer design method based on synovial membrane control
  • Ammonia coverage rate nonlinear observer design method based on synovial membrane control

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Embodiment Construction

[0056] The ammonia coverage non-linear observer design method based on synovial film control of the present invention comprises the following steps:

[0057] 1. Establish a simplified two-stage urea SCR system model;

[0058] 2. Design of ammonia coverage synovial film observer;

[0059] 3. Stability analysis of synovial film observer with ammonia coverage.

[0060] The research on the design method of the ammonia coverage nonlinear observer based on the synovial film control in the present invention is based on a software simulation platform. The simulation software system consists of Matlab / Simulink and enDYNA high-fidelity engine model software. Among them, the enDYNA software is a commercial engine precise model software developed by Teisis Company in Germany. The first 400 seconds of the European Transient Test Cycle (ETC) was selected to verify the effectiveness of the designed ammonia coverage synovial film observer.

[0061] Such as figure 2 and image 3shown. ...

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Abstract

The invention discloses an ammonia coverage rate nonlinear observer design method based on synovial membrane control, which mainly comprises the following contents: building a simplified two-order urea SCR (selective catalytic reduction) system model; providing an ammonia coverage rate synovial membrane observer design method; providing an ammonia coverage rate synovial membrane observer stability analysis process. The two-order urea SCR system model provided by the invention can substantially describe system dynamic characteristics, and the complexity is suitable for designing an ammonia coverage rate synovial membrane observer. The ammonia coverage rate synovial membrane observer provided by the invention provides a value range of a gain on the premise of guaranteeing the stability, is applicable to engineering application, and has higher robustness for external interference under an instant condition.

Description

technical field [0001] The invention belongs to the technical field of parameter estimation of a diesel engine urea SCR emission post-processing system, and in particular relates to a design method of a nonlinear observer for ammonia coverage based on synovial film control. Background technique [0002] Diesels produce more NO than petrol engines due to their lean burn characteristics x harmful gas. With the worldwide targeting of NO x More and more stringent regulations on emissions have been introduced, and various methods are used to reduce NO x The exhaust aftertreatment system available. These technologies include urea selective catalytic reduction (SCR) systems. The urea SCR system does not require additional fuel when it works, and the urea consumption is relatively low. With these advantages, it has already occupied a certain advantage in the automotive industry. In my country, the current actual national conditions are that the sulfur content in fuel oil is rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCF01N2900/1818G01N33/0054
Inventor 赵靖华陈虹胡云峰董延华黄雨蔡喜欣丛彪
Owner JILIN UNIV
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