Contents I. Introduction
In recent years, the output synchronization of complex networks has attracted great attention of researchers, and a large number of criteria have been derived to guarantee output synchronization for different complex network models [1]–[15]. Zhao and Wang [2] took the output synchronization into consideration for an impulsive complex delayed dynamical network, and some criteria were acquired to ensure global exponential output synchronization of the above-mentioned network by means of impulsive delay differential inequalities. By exploiting the relationship between output synchronization and output strict passivity, Wang et al. [5] presented two output synchronization criteria for the complex networks with adaptive and fixed coupling strengths. Wang and Wu [7] considered a kind of complex networks that not only has time-varying delay but also has output coupling, and discussed the output synchronization of this network model. Furthermore, external disturbances are ubiquitous and may disrupt output synchronization in complex networks. Therefore, it is crucial to consider external disturbances in complex networks and investigate their output synchronization. To the best of our knowledge, very few results on this topic have been reported.
