A cooperative decentralized PI control strategy: discrete-time analysis and nonlinear feedback
2012 (English)In: Proc. 3rd IFAC Workshop on Distributed Estimation and Control in Networked Systems, 2012, 103-108 p.Conference paper (Refereed)
This paper discusses an extension of a PI control strategy towards the control of a large m×m-MIMO system. This strategy is fully decentralized, it requires only the tuning of m different controllers, while we only allow for neighboring controllers to exchange error signals. This makes it a strong candidate for an implementation on a decentralized, low-power and high performance Wireless Sensor Network (WSN). The main idea is to feed locally observed control errors (’feedback’) not only into the local control law, but also in a fixed proportionate way into neighboring controllers. The analysis concerns convergence to a set point. The analysis is essentially based on a conversion of the PI control law into a discrete-time gradient descent scheme. As an interesting byproduct, this analysis indicates how to deal with quantization functions and nonlinear effects in the feedback signals.
Place, publisher, year, edition, pages
2012. 103-108 p.
IdentifiersURN: urn:nbn:se:uu:diva-183475OAI: oai:DiVA.org:uu-183475DiVA: diva2:562897
NecSys 2012, September 14-15, Santa Barbara, CA