Authors: Qingsong Xu
Publish Date: 2013/11/26
Volume: 76, Issue: 1, Pages: 551-559
Abstract
This paper presents a new scheme of discretetime sliding mode control DSMC dedicated to precision positioning control of a piezoelectrically actuated system Traditionally a hysteresis model is required to compensate for the piezoelectric nonlinearity and a state observer is needed to implement the DSMC which renders a timeconsuming procedure The proposed outputbased DSMC scheme allows the relief of these computational burdens Specifically the piezoelectric nonlinearity is considered as a lumped perturbation term which is predicted by a perturbation estimation technique The elimination of state observer is realized by establishing a control scheme based on the system output only In addition the stability of the control system is proved in theory The effectiveness of the reported scheme is validated on a prototype piezoelectric actuation system by carrying out several experimental investigations
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