Distributed extended state observer design and dual-side dynamic event-triggered output feedback anti-disturbance control for nonlinear interconnected systems with quantization

This paper studies a distributed extended state observer design and dual-side dynamic event-triggered output feedback (DEOF) anti-disturbance control for interconnected systems (ISs) subject to quantization and multi-source disturbances. First, two novel dual-side dynamic event-triggered mechanisms (DETMs) are proposed to alleviate data transmission in both sensor-to-observer (S-O) and controller-to-actuator (C-A) channels. In addition, the DETM in S-O channel is related to the quantization parameter such that a trade-off between triggering frequency and quantization density can be achieved. Second, by using the transmitted system outputs, a distributed extended state observer is constructed to estimate system states and disturbances. Then based on the outputs of distributed extended state observer, a dual-side DEOF H∞ controller is designed, which can compensate and attenuate two types of disturbances. Subsequently, some sufficient conditions are derived to guarantee system states and estimation errors converge to zero and system output satisfies H∞ performance. Finally, a numerical simulation is provided to demonstrate the obtained results.