Design of a Piezoelectric Actuator System
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We present in this chapter a case study on a piezoelectric bimorph actuator control system design using an H ∞ optimisation approach, which was originally reported by Chen et al.. Piezoelectricity is a fundamental process in electromechanical energy conversion. It relates electric polarisation to mechanical stress/strain in piezoelectric materials. Under the direct piezoelectric effect, an electric charge can be observed when the materials are deformed. The converse, or the reciprocal piezoelectric effect, is when the application of an electric field can cause mechanical stress/strain in the piezo materials. There are numerous piezoelectric materials available today, including PZT (lead zirconate titanate), PLZT (lanthanum modified lead zirconate titanate), and PVDF (piezoelectric polymeric polyvinylidene fluoride) to name a few (see Low and Guo ).
KeywordsTracking Error Initial Error Disturbance Input Nonlinear Hysteresis Reduce Order Observer
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