Publication

State estimation and decoupling of unknown inputs in uncertain LPV systems using interval observers

Journal Article (2018)

Journal

International Journal of Control

Pages

1944-1961

Volume

91

Number

8

Doc link

http://dx.doi.org/10.1080/00207179.2017.1335882

File

Download the digital copy of the doc pdf document

Authors

Abstract

This paper proposes a linear parameter varying (LPV) interval observer for state estimation and unknown inputs decoupling in uncertain continuous-time LPV systems. Two different problems are considered and solved: (1) the evaluation of the set of admissible values for the state at each instant of time; and (2) the unknown input observation, i.e. the design of the observer in such a way that some information about the nature of the unknown inputs affecting the system can be obtained. In both cases, analysis and design conditions, which rely on solving linear matrix inequalities (LMIs), are provided. The effectiveness and appeal of the proposed method is demonstrated using an illustrative application to a two-joint planar robotic manipulator.

Categories

control theory.

Scientific reference

D. Rotondo, A. Cristofaro, T.A. Johansen, F. Nejjari and V. Puig. State estimation and decoupling of unknown inputs in uncertain LPV systems using interval observers. International Journal of Control, 91(8): 1944-1961, 2018.