I. Introduction
Inspired by the development of information technology, control systems have been extensively explored in the last decades. An increasing number of scholars study the control systems involving networked system [1], [2] and multiagent systems (MASs) [3], [4]. Consensus is one of the most primary and significant study subjects in the filed of collaborative behaviors of MASs, which aims at proposing a control algorithm such that all agents can reach a common value. To the best of our knowledge, it is more realistic that the individual subsystems and the dimensions of state could be not identical. Therefore, the output consensus control protocol should be considered for heterogeneous multiagent systems (HL-MASs).