Automatica, Vol.47, No.7, 1399-1408, 2011
Multisensor fusion for linear control systems with asynchronous, Out-Of-Sequence and erroneous data
This paper presents a set of new centralized algorithms for estimating the state of linear dynamic Multiple-Input Multiple-Output (MIMO) control systems with asynchronous, non-systematically delayed and corrupted measurements provided by a set of sensors. The delays, which make the data available Out-Of-Sequence (OOS), appear when using physically distributed sensors, communication networks and pre-processing algorithms. The potentially corrupted measurements can be generated by malfunctioning sensors or communication errors. Our algorithms, designed to work with real-time control systems, handle these problems with a streamlined memory and computational efficient reorganization of the basic operations of the Kalman and Information Filters (KF & IF). The two versions designed to deal only with valid measurements are optimal solutions of the OOS problem, while the other two remaining are suboptimal algorithms able to handle corrupted data. (C) 2011 Elsevier Ltd. All rights reserved.
Keywords:Estimation theory;Information and sensor fusion;Systems with time-delays;Sensor networks;Kalman filtering;Out-of-sequence data