Title: A hybrid actuator modelling and hysteresis effect identification in camless internal combustion engines control

Authors: Paolo Mercorelli; Nils Werner

Addresses: Institute of Product and Process Innovation, Leuphana University of Lueneburg, Volgershall 1, D-21339 Lueneburg, Germany ' Faculty of Automotive Engineering, Ostfalia University of Applied Sciences, Kleiststr. 14-16, D-38440 Wolfsburg, Germany

Abstract: This paper presents a hybrid actuator composed by a piezo and a hydraulic part. Moreover, a cascade PI-PID-PI control structure for camless engine motor applications is considered. The idea of this contribution is using the advantages of both: the high precision of the piezo and the force of the hydraulic part. Piezoelectric actuators (PEAs) are mostly used for precision positioning, despite PEAs' non-linearities, such as saturations, hysteresis and creep. In the control problem these kinds of non-linearities must be taken into consideration. The Preisach dynamic model of the PEA with the above mentioned non-linearities is considered. In particular, the hysteresis effect is considered and a model with a switching function is used also for the controller design. Simulations and measured results are presented.

Keywords: piezoelectric actuators; hysteresis effect identification; internal combustion; PID control; hybrid actuators; camless IC engines; internal combustion engines; engine control; Preisach dynamic modelling; switching function; controller design; simulation.

DOI: 10.1504/IJMIC.2014.060729

International Journal of Modelling, Identification and Control, 2014 Vol.21 No.3, pp.253 - 263

Published online: 27 Apr 2014 *

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