Distributed H∞-consensus filtering in sensor networks with multiple missing measurements: The finite-horizon case

• DOI: 10.1016/j.automatica.2010.06.025
• Publication Date: 2010-07-12T00:47:23Z
• Authors: Bo Shen; Zidong Wang; Y.S. Hung
• Keywords: Sensor networks; 0209 industrial biotechnology; Distributed H∞-consensus filtering; 518; Data missing; 02 engineering and technology; Finite-horizon; Discrete time-varying systems; Difference linear matrix inequalities

This paper is concerned with a new distributed H"~-consensus filtering problem over a finite-horizon for sensor networks with multiple missing measurements. The so-called H"~-consensus performance requirement is defined to quantify bounded consensus regarding the filtering errors (agreements) over a finite-horizon. A set of random variables are utilized to model the probabilistic information missing phenomena occurring in the channels from the system to the sensors. A sufficient condition is first established in terms of a set of difference linear matrix inequalities (DLMIs) under which the expected H"~-consensus performance constraint is guaranteed. Given the measurements and estimates of the system state and its neighbors, the filter parameters are then explicitly parameterized by means of the solutions to a certain set of DLMIs that can be computed recursively. Subsequently, two kinds of robust distributed H"~-consensus filters are designed for the system with norm-bounded uncertainties and polytopic uncertainties. Finally, two numerical simulation examples are used to demonstrate the effectiveness of the proposed distributed filters design scheme.