Using Euler Discrete Approximation to Control an Aggregate Actuator in Camless Engines

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

This paper deals with a hybrid actuator composed by a piezo and a hydraulic part controlled using two cascade Lyapunov controllers for camless engine motor applications. The idea is to use the advantages of both, the high precision of the piezo and the force of the hydraulic part. In fact, piezoelectric actuators (PEAs) are commonly used for precision positionings, despite PEAs present nonlinearities, such as hysteresis, saturations, and creep. Problems such nonlinearities must be taken into account in the control. In this paper the Preisach dynamic model with the above mentioned nonlinearities is considered together with cascade controllers which are Lyapunov based. The sampled
control laws are derived using the well-known Backward Euler method. An analysis of the Backward and Forward Euler method is also presented. In particular, the hysteresis effect is considered and a model with a switching function is used also for the controller design. Simulations and real measurements are shown.
OriginalspracheEnglisch
ZeitschriftInternational Journal of Mathematical Models and Methods in Applied Sciences
Jahrgang8
Ausgabenummer1
Seiten (von - bis)273-280
Anzahl der Seiten8
ISSN1998-0140
PublikationsstatusErschienen - 2014

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