Stability of networked control systems

TLDR

The paper investigates the stability of networked control systems under network‑induced delay and packet dropout, proposing improved models and compensation methods. It models NCSs with delay and dropout as hybrid and asynchronous dynamical systems, analyzes stability using stability regions and a hybrid systems technique, and validates the approach experimentally on a physical network. Experimental results confirm that the proposed compensation methods maintain stability, supporting the effectiveness of the models and analysis.

Abstract

First, we review some previous work on networked control systems (NCSs) and offer some improvements. Then, we summarize the fundamental issues in NCSs and examine them with different underlying network-scheduling protocols. We present NCS models with network-induced delay and analyze their stability using stability regions and a hybrid systems technique. Following that, we discuss methods to compensate network-induced delay and present experimental results over a physical network. Then, we model NCSs with packet dropout and multiple-packet transmission as asynchronous dynamical systems and analyze their stability. Finally, we present our conclusions.