Technical Report 2015-018

Delay-Independent Stability Criteria for Networked Control Systems

Johannes Nygren, Torbjörn Wigren, and Kristiaan Pelckmans

June 2015

The report analyses a networked control system consisting of a LTI system coupled with a static nonlinearity, subject to large delays in the feedback loop. This model is valid for example in wireless data flow control, where a saturation occurs since the flow is one-directional. The present report extends previous results by proving necessity, in case the loop gain is uniformly less than 1. The results are validated and illustrated in a simulation study.

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