Title :
Distributed bounded-error state estimation for partitioned systems based on practical robust positive invariance
Author :
Riverso, Stefano ; Rubini, Daria ; Ferrari-Trecate, Giancarlo
Author_Institution :
Dipt. di Ing. Ind. e dell´Inf., Univ. degli Studi di Pavia, Pavia, Italy
Abstract :
In this paper we propose a novel partition-based state estimator for linear discrete-time systems composed of physically coupled subsystems affected by bounded disturbances. The proposed scheme is distributed in the sense that each local state estimator exploits suitable pieces of information from parent subsystems. Moreover, differently from schemes based on moving horizon estimation, it does not require the on-line solution to optimization problems. Our method also guarantees the satisfaction of constraints on local estimation errors. We achieve our aims exploiting the notion of practical robust positive invariance developed in [1]. As an example, we illustrate the use of the distributed state estimator for reconstructing the states of a power network system.
Keywords :
discrete time systems; invariance; linear systems; optimisation; state estimation; bounded disturbances; distributed bounded-error state estimation; distributed state estimator; linear discrete-time system; local state estimator; moving horizon estimation; optimization problem; partition-based state estimator; partitioned system; physically coupled subsystem; power network system; practical robust positive invariance; Couplings; Economic indicators; Nickel; Robustness; Silicon; State estimation; Vectors;
Conference_Titel :
Control Conference (ECC), 2013 European