This research focuses on the tracking control design for a camless engine valve actuator during engine speed transients. The cyclic but aperiodic valve reference signal to be tracked can be modeled using two different methods, i.e., as a combination of frequency varying sinusoids in the time domain or as a repetitive (periodic) signal in the rotational angle domain. The recently developed time-varying internal model based controller is ideally suited for both the approaches. Investigation of the continuous time and discrete domain implementations uncovers some unique characteristics resulting from the time-varying nature of the system which favor working in the discrete domain. A quantitative analysis comparing various performance metrics for the different approaches of modeling the reference signal helps highlight the relative advantages of each method. Finally, experimental results from a prototype camless engine valve actuation system help validate the overall effectiveness of the proposed approach.
|Original language||English (US)|
|Number of pages||6|
|Journal||Proceedings of the IEEE Conference on Decision and Control|
|State||Published - Dec 1 2012|
|Event||51st IEEE Conference on Decision and Control, CDC 2012 - Maui, HI, United States|
Duration: Dec 10 2012 → Dec 13 2012