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In this paper, an active queue management (AQM) algorithm is investigated based on adaptive fuzzy sliding mode control for the problem of congestion control in TCP complex systems with unknown nonlinear disturbance. A sliding surface is constructed based on Lyapunov-Krasovskii method for the particular network model, and a sufficient condition is proposed for robust asymptotic stability of the system...
In this paper, the regularization problem is investigated for nonlinear differential-algebraic equation (DAE) systems with unknown parameters, which appear linearly in both differential and algebraic equations. It is shown that the feasibility of the proposed algorithms guarantees the existence of a feedback controller so that the resulting closed-loop systems admit equivalent ordinary differential...
This paper studies the problem of output feedback control for a 2-DOF parallel robot. The dynamics of the parallel robots are characterized a set of ordinary differential equations(ODEs). Under the condition of bounded joint velocities, a linear output dynamic compensator is designed to guarantee the semi-global exponential stability of the closed- loop system. The bound of velocity can be made arbitrarily...
In this paper, an active queue management (AQM) controller is designed for the problem of congestion control. In TCP networks, the packet-dropping probability function is considered as a control input. Thus, a TCP/AQM controller is modeled as a time-delay system with a saturated input. The robust observer-based controller is designed to achieve the desired queue size and guarantee the asymptotic stability...
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