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- Title
Piezoelectric positioning control with output‐based discrete‐time terminal sliding mode control.
- Authors
Xu, Qingsong; Cao, Zhenwei
- Abstract
Nanopositioning systems with piezoelectric actuation have found extensively applications in micro‐/nanomanipulation domain. This paper reports on the design, realisation and testing of a new output‐based discrete‐time terminal sliding mode control (DTSMC) scheme, which is applied to achieve precision motion control of a piezoelectric nanopositioning system by overcoming the unmolded non‐linearity and disturbance. The controller is easy to implement because it does not require a hysteresis model and a state observer. It is able to deliver a precise tracking without chattering phenomenon. The stability of the control system is proved and the effectiveness of the control scheme is demonstrated through experimental studies. Results show that the non‐linear DTSMC robust control is superior to the conventional linear discrete‐time sliding‐mode control in motion tracking application. The DTSMC enables the generation of a larger bandwidth than the conventional approaches. Moreover, the DTSMC endows the system a well robustness feature in the presence of model uncertainty and external disturbances.
- Publication
IET Control Theory & Applications (Wiley-Blackwell), 2017, Vol 11, Issue 5, p694
- ISSN
1751-8644
- Publication type
Article
- DOI
10.1049/iet-cta.2016.0956