Energy-Based Key-On Control of a Double Magnet Electromechanical Valve Actuator

Mario di Bernardo, Alessandro di Gaeta, Carlos Ildefonso Hoyos Velasco, Stefania Santini

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)


The aim of this paper is to design, analyze, and validate via experiments the control of a double magnet electromechanical valve actuator (EMVA). Such actuators have shown to be a promising solution to actuate engine valves during normal engine cycle. Their use can increase engine power, reduce fuel consumption and pollutant emissions, and improve significantly engine efficiency. To this aim, this actuator needs to be properly controlled at the engine startup for the first valve lift (key-on control). Mathematically, the EMVA system can be described as a highly nonlinear piecewise-smooth mechanical oscillator. The proposed control law is based on an energy control approach. Bifurcation analysis of the closed-loop system is carried out to characterize the nonlinear dynamics of the valve and to tune the controller. The numerical and theoretical analysis is in good agreement with the experimental results.

Original languageEnglish
Pages (from-to)1133-1145
Number of pages13
JournalIEEE Transactions on Control Systems Technology
Issue number5
Publication statusPublished - Sep 2012

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