Junyong Sun

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This paper considers the distributed consensus tracking problem for the linear multi-agent systems with unknown dynamics under general directed graphs. Based on the output information among the agents, distributed adaptive consensus tracking protocols together with two observers, consisting of a local observer and an adaptive estimator, are designed to(More)
In this paper, a new predictor-based consensus disturbance rejection method is proposed for high-order multi-agent systems with Lipschitz nonlinearity and input delay. First, a distributed disturbance observer for consensus control is developed for each agent to estimate the disturbance under the delay constraint. Based on the conventional predictor(More)
This paper studies the finite-time attitude control problem for a rigid body. It is known that linear asymptotically stabilizing control laws can be derived from passivity properties for the system which describes the kinematic and dynamic motion of the attitude. Our approach expands this framework by defining finite-time passivity and exploring the(More)
In this paper, the adaptive consensus disturbance rejection problem is considered for the liner multi-agent systems under directed graphs. Based on the relative state information of the neighboring agents, the consensus protocols, including a state observer and a disturbance observer, are designed to guarantee that the consensus error goes to zero with the(More)
In this paper, we study the optimal tracking problem for the multi-agent systems in which both the cost function and the tracking time are considered. The tracking problem is considered in two patterns: the first one has a virtual leader which is the root of the information graph; the second one has a time-varying leader whose dynamics is given in advance.(More)
In this paper the passivity-based finite-time attitude control problem of a rigid spacecraft is addressed. Firstly, for a certain class of nonlinear passive system we derive different control laws according to different choices of storage functions. Based on this result, combining the sliding mode control method, we propose a passivity-based finite-time(More)
In this paper, the consensus tracking problem with unknown dynamics in the leader for the linear multiagent systems is addressed. Based on the relative output information among the agents, decentralized adaptive consensus protocols with static coupling gains are designed to guarantee that the consensus tracking errors converge to a small neighborhood around(More)
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