Novel criteria on Hα filter design of linear networked control systems

This study considers H_∞ filter design for a class of linear networked control systems with quantisation. The effects of network-induced delay, data loss and signal quantisation on the system is considered, where the quantiser is selected to be logarithmic. Based on the modified delay-central-point method and using the convexity property of the matrix inequality, new criteria are derived for the H_∞ performance analysis of the filtering-error systems, which can lead to a less conservative analysis results and thus reduce the overdesign of the filter. Two examples are provided to show the less conservatism of the derived analysis results and also to illustrate the design procedures of the filters´ parameters.