Output Tracking in First-Order Time-Delay Systems: A Dynamic Control Approach
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© 2015, IFAG. Output tracking of systems, which are represented through a surrogate first-order model with a delay in the control input, is examined in this paper. A dynamic control input is proposed to maintain the system output to track a desired reference profile, while providing closed-loop stability. The system closed-loop response is demonstrated for fueling control in lean-burn gasoline spark ignition engines addressing the varying transport and combustion delays. The developed methodology, which is validated on a Ford F-150 SI lean-burn engine model with large time-varying delay in the control loop, exhibits improved performance in terms of disturbance attenuation, measurement noise accommodation and robustness against delay estimation anomalies. The proposed controller is compared with a PI controller equipped with a Smith predictor and the results are discussed for various operating conditions.
author list (cited authors)
Ebrahimi, B., Grigoriadis, K., Franchek, M., & Tafreshi, R.