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In this paper, we consider robust regulation of a class of nonlinear systems, via H∞ controller using singular perturbation approach. First, using normal form equations, we eliminate the nonlinear part of the system matrix of equations of system and transform it to a linear diagonal form. Separating new equations to slow and fast subsystems, due to the singular perturbation approach and with the assumption...
This paper presents a new PID congestion controller design for transmission control protocol (TCP) networks. It would be possible to efficiently control the TCP traffic in the proposed control scheme. This would be done via the use of only the queue length at router needless to know the TCP window size which is not accessible at the routers side. The stability condition is presented by applying linear...
This paper concerns the tracking control problem for a class of nonlinear networked control systems (NCSs) with external disturbances. A Takagi-Sugeno fuzzy model is employed to represent the nonlinear controlled plant in the NCSs. Both network-induced delay and packet dropout are addressed. The control scheme is based on a parallel distributed compensation (PDC) structure, a fuzzy observer and a...
In this work we study a high-gain adaptive controller for surge suppression in a centrifugal compressor with variable speed. We consider a system configuration in which the outlet throttle valve is the actuator and the total pressure at the compressor inlet is considered as the measured output. By using a third order compressor model in which the spool dynamics is considered with a proposed nonlinear...
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