کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
561435 1451885 2012 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Asymmetric-hysteresis compensation in piezoelectric actuators
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
Asymmetric-hysteresis compensation in piezoelectric actuators
چکیده انگلیسی

The advantages of using piezoelectric actuators in ultra-precision applications are often impaired by nonlinear effects, in particular hysteresis, which may lead to positioning uncertainties of up to 15% of the actuator's stroke. Model-based compensation strategies are often prescribed in order to overcome this limitation and achieve better dynamical accuracy. This comes, however, at the expense of increasing identification and implementation complexity, especially when hysteresis is of the asymmetric type, such as prevalent in hard piezoceramic materials. This paper proposes a new compensation strategy based upon (i) treating hysteresis as being separate from other dynamical effects and (ii) formulating a new, simplified model to deal with asymmetric hysteresis, based on applying a linear operator to the conventional hysteresis models. After developing the theoretical background of the compensation strategy, the accuracy improvement due to the new hysteresis-compensation method is demonstrated experimentally.


► Compensation strategy for asymmetric hysteresis in piezoelectric actuators.
► Decoupled modelling of hysteresis and actuator dynamics.
► Position feedback control with feedforward hysteresis compensation.
► Low model identification and implementation effort.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanical Systems and Signal Processing - Volume 30, July 2012, Pages 218–231
نویسندگان
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