We consider the leader-following consensus problem of discrete-time multiagent systems on a directed communication topology. Two types of distributed observer-based consensus protocols are considered to solve such a problem. The observers involved in the proposed protocols include full-order observer and reduced-order observer, which are used to reconstruct the state variables. Two algorithms are provided to construct the consensus protocols, which are based on the modified discrete-time algebraic Riccati equation and Sylvester equation. In light of graph and matrix theory, some consensus conditions are established. Finally, a numerical example is provided to illustrate the obtained result.
"Leader-Following Consensus Stability of Discrete-Time Linear Multiagent Systems with Observer-Based Protocols." Abstr. Appl. Anal. 2013 (SI55) 1 - 10, 2013. https://doi.org/10.1155/2013/357971