Unknown input observer with stability: A structural analysis approach in bond graph. (May 2018)

• Record Type: Journal Article
• Authors: Gonzalez, Joel; Sueur, Christophe
• Is Part Of: European journal of control. Volume 41(2018)
• Page Start: 25
• Page End: 43
• Publication Date: 2018-05
• Subjects: Unknown input observer -- Bond graph -- Structural analysis -- MIMO systems; Control theory -- Periodicals; Automatic control -- Periodicals; Automatic control -- Mathematics -- Periodicals; Electronic journals; 629.805
• DOI: 10.1016/j.ejcon.2018.01.006
• Languages: English
• ISSNs: 0947-3580

Abstract

Abstract: This paper presents a solution for the state and unknown input estimator of linear MIMO systems with a structural approach based on Bond Graph methodology. A systematic procedure is initially proposed at the analysis stage by studying the finite and infinite structures of the modeled system from a structural approach, similar to the case study for the classical input-output decoupling problem and the disturbance rejection problem. Afterwards, the observer that can be represented by a Bond Graph model is directly implemented from the original model at the synthesis stage. The monovariable case as well as the multivariable case are treated and the stability property of the classical error equations (state and disturbance) of the observer is studied, based on the stability property of the invariant zeros of the model. The observer is tested by an illustrative example that considers a real bar system used for different cases.