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Simple homogeneous sliding-mode controller
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DOI：10.1016/j.automatica.2016.01.017.png)
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Abstract
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High-order sliding mode (HOSM) control is known to provide for finite-time-exact output regulation of uncertain systems with known relative degrees. Yet the corresponding universal HOSM controllers are typically constructed by special recursive procedures and have complicated form. We propose two new families of homogeneous HOSM controllers of a very simple form. Lyapunov functions are provided for a significant part of the first-family controllers. The second family consists of quasi-continuous controllers, which can be done arbitrarily smooth everywhere outside of the HOSM manifold. A regularization procedure ensures high-accuracy output regulation by means of control with required smoothness level. Output-feedback controllers are constructed. Controllers of the orders 3-5 are demonstrated. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords:
Higher-order sliding mode control
Finite time stability
Homogeneity
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