Decentralized H∞ quantized dynamic output feedback control for uncertain interconnected networked systems

This paper addresses the problem of dynamic output feedback controllers and quantizers for uncertain interconnected H_∞ decentralized feedback networked systems. Since the networked systems are controlled by the computers, the signals need to be quantized by general quantizers before they are passed to the controllers and the systems. For this purpose, under the assumption that a decentralized dynamic output feedback controller has been designed, a quantized control strategy is proposed which is dependent not only on the controller states but also on the system measurement outputs so that the quantized closed-loop system is asymptotically stable and with the same H_∞ disturbance attenuation level as on no quantizers circumstance. Both the designed controllers and the quantizers´ parameters are constructed in a decentralized manner, depending on local information.