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This paper addresses cooperative global robust output regulation for heterogeneous and uncertain multiagent nonlinear systems in the output-feedback normal form.Specifically,we develop a Lyapunov-based dynamic output-feedback law using a nonlinear internal model approach.We show that an effective control law can be constructed under general (static) directed communication topologies even when the leader is unknown.Hence,the present study offers a more general investigation of the problem in comparison with the developments in the recent literature.