Sliding-mode Control of Ammonia Coverage Ratio for Automotive Selective Catalytic Reduction Systems

Yao Ma, Junmin Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

This paper presents a sliding-mode control method for automotive Selective Catalytic Reduction (SCR) systems to regulate ammonia coverage ratios to desired levels. SCR systems have been widely adopted on Diesel powered vehicles to reduce tailpipe NOx emissions. To maintain a high NOx removal efficiency as well as acceptable ammonia slip, the SCR ammonia coverage ratio has to be critically controlled to balance such a tradeoff. A sliding-mode control method is analytically developed to track the target ammonia coverage ratio. Its tracking performance under bounded measurement noise is evaluated. The control input saturation is explicitly considered and its effect on SCR transient behavior is assessed in the design procedure. Simulation results indicate the proposed control can effectively track the target ammonia coverage ratio and comparative study against a traditional PID control demonstrates the improvement of robustness in the presence of bounded disturbances.

Original languageEnglish
Title of host publication2018 Annual American Control Conference, ACC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages25-30
Number of pages6
ISBN (Print)9781538654286
DOIs
StatePublished - Aug 9 2018
Event2018 Annual American Control Conference, ACC 2018 - Milwauke, United States
Duration: Jun 27 2018Jun 29 2018

Publication series

NameProceedings of the American Control Conference
Volume2018-June
ISSN (Print)0743-1619

Conference

Conference2018 Annual American Control Conference, ACC 2018
CountryUnited States
CityMilwauke
Period06/27/1806/29/18

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