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Model-Based Throttle Control using StaticCompensators and IMC based PID-Design
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, The Institute of Technology.
2009 (English)In: 2009 IFAC Workshop on Engine and Powertrain Control, Simulation and Modeling. Paris, France., 2009Conference paper, Published paper (Refereed)
Abstract [en]

In modern spark ignited engines the throttle is controlled by the electronic control unit (ECU) which gives the ECU direct control of the air flow and thereby the engine torque. This puts high demands on the speed and accuracy of the controller that positions the throttle plate. The throttle control problem is complicated by two strong nonlinear effects, friction and limp-home torque. This paper proposes the use of two, simultaneously active, static compensators to counter these effects and approximately linearize the system. A PID controller is designed for the linearized system, where IMC design is applied to design the PD controller and a gain scheduled I-part is added for robustness against model errors. A systematic procedure for generating compensator and controller parameters from open loop experiments is also developed. The controller performance is evaluated both in simulation, on a TC-benchmark problem, and experimentally. A robustness investigation pointed out that the limp-home position is an important parameter for the controller performance, this is emphasized by the deviations found in experiments. The proposed method for parameter identification achieves the desired accuracy.

Place, publisher, year, edition, pages
2009.
Keyword [en]
Limp home, friction compensation, internal model control, PID, automatic tuning
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-50770OAI: oai:DiVA.org:liu-50770DiVA: diva2:272131
Available from: 2009-10-14 Created: 2009-10-14 Last updated: 2009-10-16

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Thomasson, AndreasEriksson, Lars

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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • text
  • asciidoc
  • rtf