A second order time-varying parameters extended state observer based on hyperbolic sine function for uncertain nonlinear disturbances

DOI

10.2991/iwmecs-15.2015.162How to use a DOI?

Keywords

hyperbolic sine function; extended state observer (ESO); Lyapunov function; time-varying parameters; derivative peaking.

Abstract

Derivative peaking phenomena appears in the initial stage when the initial value error between the classical extended state observer (ESO) and system state variables is bigger. A general form of extended state observer with nonlinear hyperbolic sine function is provided. The stability of a second-order ESO error system is proved with the Lyapunov function. The ESO with time-varying parameters which based on the saturation characteristic of hyperbolic tangent function was designed to realize the effectiveness of derivative peaking phenomena. Finally, the simulation experiments compared with the classical extended state observer shows that the proposed extended state observer can effectively inhibit derivative peak, and get the accurate estimation both of system state variables and uncertain nonlinear disturbances.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hongguo Yu
AU  - Zhongjian Kang
AU  - Yao Chen
PY  - 2015/10
DA  - 2015/10
TI  - A second order time-varying parameters extended state observer based on hyperbolic sine function for uncertain nonlinear disturbances
BT  - Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences
PB  - Atlantis Press
SP  - 820
EP  - 826
SN  - 2352-538X
UR  - https://doi.org/10.2991/iwmecs-15.2015.162
DO  - 10.2991/iwmecs-15.2015.162
ID  - Yu2015/10
ER  -