Proactive feedback for networked CPS
Sumana Ghosh, Arnab Mondal, Debayan Roy, Philipp H. Kindt, Soumyajit Dey, Samarjit Chakraborty · 2021
While wired networks provide a reliable platform for networked cyber-physical systems (CPS), there is an increasing demand for CPS built upon wireless networks. However, wireless connectivity also implies varying and unpredictable end-to-end delays due to packet loss, interference by concurrently transmitting nodes or the necessity to forward packets via one or many intermediate nodes. This is typically accounted for by designing controllers for the worst-case end-to-end delay. This guarantees stability also when the largest possible delay occurs. However, the delays observed during normal operation are significantly below the worst-case. As a result of the overly pessimistic controller design, the control performance becomes unnecessarily low. In this work, for the first time, we present a generic technique to handle varying end-to-end delays in wireless CPS.