Discrete Lyapunov Controllers for an Actuator in Camless Engines

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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. In the control problem such nonlinearities must be taken into account. 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 with real data are shown.
Original languageEnglish
Title of host publicationRecent advances in circuits, systems and control : Proceedings of the 2014 International Conference on Circuits, Systems and Control (CSC 2014); Interlaken, Switzerland February 22 - 24, 2014
EditorsMaria Isabel Garcia-Planas, George Vachtsevanos, Gen Qi Xu
Number of pages6
PublisherEuropment
Publication date2014
Pages19-24
ISBN (print)978-1-61804-216-3
Publication statusPublished - 2014
EventInternational Conference on Circuits, Systems and Control - CSC 2014 - Interlaken, Switzerland
Duration: 22.02.201324.02.2014
http://www.inase.org/conferences/2014/interlaken/csc.htm

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