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February 9, 2011

Mtg: The Intelligence Under the Hood: Adaptive Control of IC Engines

by @ 5:30 pm. Filed under ALL, Computers/Software, Electronics Design, Semiconductors

THURSDAY February 24, 2011
SCV Computational Intelligence Chapter
Speaker: Dr. Yildiray Yildiz, NASA Ames Research Center
Time: Presentation at 6:30 PM
Cost: none
Place:Packard Building Room 101, Stanford University, Stanford
RSVP: not required

What happens when you press the gas pedal in your car? How does the engine continue to run smoothly while you are waiting at the red light? How is the amount of air and fuel going into the engine calculated? Anyone who attempts to answer these questions has to mention the unseen intelligence orchestrating the operation of the internal combustion engine: Control theory. In this talk, I will focus on two basic control loops related with the IC engine: Idle Speed Control (red light, remember?) and Fuel-to-Air Ratio control. First, I will explain basic working principles of these control loops. Then, I will present the application of the recently developed Adaptive Posicast Controller (APC) to these problems. The APC is an adaptive controller with explicit delay compensation built upon the ideas of the classical Smith Predictor and finite spectrum assignment. I will show experimental results which were conducted using Ford Motor Company test vehicles at Dearborn, Michigan. These experimental results demonstrate improved performance compared to existing baseline controllers and effective handling of time delays and uncertainties. Aspects important to implementation and to reduction in calibration time and effort, including the selection of initial parameter values and their adaptation rates, preventing parameter drift and accounting for time-varying delay, are addressed.

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