H2/H∞ filtering of hybrid networks with random packet losses

Most existing networked filtering methods are proposed to solve the filtering problem under single (wireless or wired) network environment. However, with the development of the networked technology, hybrid networks that integrate wireless and wired networks are gradually employed in industrial fields. The main objectiveness of the paper is to investigate H₂/H_∞ filtering of hybrid networks with random packet losses. Firstly, two different Bernoulli random processes are used to describe the characters of the random packet losses of wireless and wired networks, respectively. A model of filtering error dynamic system is then proposed, and a sufficient condition of stochastic stability is further obtained, where the relationship between the system stability, the filter parameters and the packet losses parameters is established. Finally, simulation results confirm the effectiveness and feasibility of the proposed method.