• Login
    View Item 
    •   Repository Home
    • Electronic Theses and Dissertations
    • Published ETD Collection
    • View Item
    •   Repository Home
    • Electronic Theses and Dissertations
    • Published ETD Collection
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Gain-Scheduling Control of Air-Fuel Ratio in Spark Ignition Engines with Time-Delay Effects

    View/Open
    TASOUJIAN-THESIS-2020.pdf (3.586Mb)
    Date
    2020-05
    Author
    Tasoujian, Shahin
    Metadata
    Show full item record
    Abstract
    This thesis addresses a variety of gain-scheduling control design schemes for the air-fuel ratio (AFR) control problem in spark ignition (SI) engines. Fueling strategy design has drawn significant attention in the past decades since it is essential for maximizing the fuel economy while minimizing harmful exhaust emissions. The fuel path of the SI engine, as well as the three-way catalyst (TWC) dynamics, have been captured by a continuous-time linear parameter-varying (LPV) system with varying time-delay. LPV systems are linear dynamical systems whose dynamic characteristics rely on a measurable scheduling parameter vector, where the scheduling parameter vector is used to capture the dynamics of time-varying systems. In the first part, a classical frequency-domain control method of parameter-varying loop-shaping is utilized to tackle the challenges imposed by the non-minimum phase (NMP) system and provide stability and desired performance. The second part of the thesis deals with the delay-dependent output-feedback LPV controller synthesis by using parameter-dependent Lyapunov-Krasovskii functionals. Stability conditions and a prescribed induced L2-norm in terms of the disturbance rejection performance are derived in a convex linear matrix inequalities (LMIs) setting. The proposed control methodology has a distinct advantage over previously developed methods as it results in less conservative results and able to handle LPV systems with arbitrary varying large time-delays. In the last part, a delay-dependent sampled-data LPV controller is proposed. Due to the discrete nature of the controllers, the main goal of this part is to find a discrete-time controller to satisfy the objectives. The interconnection of the continuous-time plant and a digital controller through converter devices forms a hybrid closed-loop configuration, which is challenging to analyze mathematically. The input-delay method has been employed to transfer the hybrid system into the continuous-time domain. The designed sampled-data gain-scheduled LPV controller is proposed to take the inter-sample behavior into account and is required to establish the closed-loop asymptotic stability and a prescribed level of performance for the closed-loop hybrid LPV system with an arbitrarily varying time delay and sampling time. Finally, conducted simulation scenarios assess the performance of the proposed digital controller in the sense of reference AFR tracking and disturbance attenuation.
    URI
    https://hdl.handle.net/10657/6574
    Collections
    • Published ETD Collection

    Related items

    Showing items related by title, author, creator and subject.

    • Case-Control Pilot Study of Soft Contact lens Wearers with Corneal Infiltrative Events and Healthy Controls 

      Richdale, Kathryn; Lam, Dawn Y.; Wagner, Heidi; Zimmerman, Aaron B.; Kinoshita, Beth T.; Chalmers, Robin L.; Sorbara, Luigina; Szczotka-Flynn, Loretta; Govindarajulu, Usha; Mitchell, G. Lynn (Investigative Ophthalmology & Visual Science, 2016-01)
      Purpose: The purpose of this study was to assess risk factors associated with soft contact lens (SCL)-related corneal infiltrative events (CIEs). Methods: This was a single-visit, case-control study conducted at five ...
    • Real-time prosthesis control using PID embedded control system 

      Seibert, Dana (2018)
      This project works to develop an intrinsic control system to autonomously operate a powered knee prosthetic leg. A custom powered knee was modified to include a 12-bit encoder, microcontroller, and motor driver. An embedded ...
    • Algorithms for Particle Swarms Using Global Control: Aggregation, Mapping, Coverage, Foraging, and Shape Control 

      Viswanathan Mahadev, Arun; 0000-0003-1979-494X (2017-05)
      Targeted drug delivery is a promising technique to reduce the side effects of drugs by delivering them in concentrated doses using large swarms (10^16) of controllable microbots only targeting bad or infected tissue. A ...

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    TDL
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsDepartmentsTitlesSubjectsThis CollectionBy Issue DateAuthorsDepartmentsTitlesSubjects

    My Account

    Login

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    TDL
    Theme by 
    Atmire NV