Modeling communication networks with hybrid systems
IEEE/ACM Transactions on Networking (TON)
Controlled Channel Access Scheduling for Guaranteed QoS in 802.11e-Based WLANs
IEEE Transactions on Wireless Communications
Control of systems integrating logic, dynamics, and constraints
Automatica (Journal of IFAC)
Predictive control of networked control systems over differentiated services lossy networks
DATE '12 Proceedings of the Conference on Design, Automation and Test in Europe
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Networked control systems are a well-known sub-set of cyber-physical systems in which the plant is controlled by sending commands through a digital packet-based network. Current control networks provide advanced channel access mechanisms to guarantee low delay on a limited fraction of packets (low-delay class) while the other packets (un-protected class) experience a higher delay which increases with channel utilization. We investigate the extension of model predictive control to choose both the command value and its assignment to one of the two classes according to the predicted state of the plant and the knowledge of network condition. Experimental results show that more commands are assigned to the low-delay class when either the tracking error is high or the network condition is bad.