H∞ filtering for nonlinear stochastic systems with sensor saturation, quantization and random packet losses

Authors:
Wei Yang;Ming Liu;Ping Shi
Affiliations:
School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;Heilongjiang Communications Polytechnic Qiqihar, Heilongjiang 161000, China
Venue:
Signal Processing
Year:
2012

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Abstract

This paper is concerned with the H"~ filtering problem for a class of nonlinear stochastic systems subject to sensor saturation over unreliable communication channel. The investigated plant is described by a class of stochastic systems with global Lipschitz nonlinearities and random noise depending on state and external-disturbance. The characteristic of sensor saturation is handled by a decomposition approach which is more general than those in the existing work where the sensor saturation and network-induced phenomenon were considered separately. The communication links between the plant and filter are unreliable network channels, and the effects of output logarithmic quantization and data packet losses are considered together. The purpose of this work is to design a full-order filter by employing the incomplete output measurements such that the dynamics of the estimation error is guaranteed to be stochastically stable. Both filter analysis and synthesis problems are investigated, and the explicit expression of the desired filters is also provided. Finally, a numerical simulation is illustrated to show the effectiveness of the designing filtering technique.