Error encoding algorithms for networked control systems

A networked control system is characterized by having a feedback loop closed through a local area network. This paper considers methods for scheduling the use of the network to guarantee both stability and controller performance. We propose and validate algorithms for choosing message identiÞers for dynamically scheduled networked control systems. Two schemes for selecting priority levels are proposed: a Þxed arbitrary grid and an auto-scaling grid. We prove that the system is uniformly ultimately bounded in the case of the Þxed encoding scheme, and asymptotically stable with auto-scaling. An inverted pendulum is used to illustrate the encoding methods.