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The note studies the synchronization problem of a class of nonlinear heterogeneous multiple agents with distributed sampled-data controllers. Through the design of a group of reference models, the synchronization problem reduces to a perturbed output regulation problem for each individual agent. The perturbed output regulation problem aims to achieve reference tracking in the presence of constant...
A piezoelectric actuator (PEA) with hysteretic characteristics is usually difficult to precisely control because the unmeasurable hysteretic force is typically generated by a complicated nonlinear model. In this paper, the global robust tracking problem of a PEA with hysteresis is first studied within an internal model architecture. With the proposed controller, the PEA is able to asymptotically track...
This paper develops an approach to dealing with the global robust output regulation problem for a class of nonlinear systems with integral input-to-state stable (iISS) inverse dynamics by using output feedback control. As iISS condition is strictly weaker than ISS condition, the result of this paper applies to a larger class of nonlinear systems.
This paper studies the global robust output regulation problem for a class of output feedback systems subject to an uncertain exosystem by using output feedback control. An adaptive control technique is used to handle the unknown parameter vector in the exosystem. It is shown that this unknown parameter vector can be exactly estimated asymptotically if the controller incorporates a minimal internal...
In this paper we deal with robust finite-time output regulation problem for linear and nonlinear systems driven by exosystems with uncertain disturbances. Unlike most of the existing results, the exosystem is nonautonomous and involves bounded unmodeled uncertainties. A design method of variable structure controller is presented and it is shown that the global robust finite-time output regulation...
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