Journal
AUTOMATICA
Volume 112, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.automatica.2019.108678
Keywords
Variable-structure systems; Sliding-mode control; Differentiators; State feedback
Funding
- Christian Doppler Research Association, Austria
- Austrian Federal Ministry for Digital and Economic Affairs
- National Foundation for Research, Technology and Development, Austria
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Recent results regarding the stability properties of an extended super-twisting controller, the convergence of smooth finite- and fixed-time convergent differentiators, and an upper convergence time bound for a homogeneous state-feedback control law are revisited. Counterexamples show that three such results are incorrect as stated. New formal results obtained in course of the examples' construction and their discussion provide valuable insight into the considered controllers and observers. (C) 2019 The Author. Published by Elsevier Ltd.
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