Bibliographic Details
| Title: |
Actuator fault estimation based on a proportional-integral observer with nonquadratic Lyapunov functions. |
| Authors: |
Guzman, J.1 (AUTHOR), López-Estrada, F.-R.1 (AUTHOR) frlopez@ittg.edu.mx, Estrada-Manzo, V.2 (AUTHOR), Valencia-Palomo, G.3 (AUTHOR) |
| Source: |
International Journal of Systems Science. Jun2021, Vol. 52 Issue 9, p1938-1951. 14p. |
| Subjects: |
Lyapunov functions, Actuators, Matrix inequalities, Nonlinear estimation, Linear matrix inequalities, Nonlinear systems |
| Abstract: |
This work proposes a proportional-integral fault estimation observer for nonlinear systems by means of convex structures. Unlike the traditional approaches that consider quadratic Lyapunov functions, this work employs nonquadratic ones. As a result, less conservative conditions in the form of linear matrix inequalities are obtained. Furthermore, an H ∞ performance is employed in order to ensure robustness against sensor noise and disturbances; thus, the designed observer estimates both the state and the actuator faults even in the presence of disturbances. The performance of the proposed methodology is illustrated through a numerical example and a three-tank hydraulic system. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
