Wireless networked control systems with QoS-based sampling

J. Colandairaj, George Irwin, William Scanlon

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)


Closing feedback loops using an IEEE 802.11b ad hoc wireless communication network incurs many challenges sensitivity to varying channel conditions and lower physical transmission rates tend to limit the bandwidth of the communication channel. Given that the bandwidth usage and control performance are linked, a method of adapting the sampling interval based on an 'a priori', static sampling policy has been proposed and, more significantly, assuring stability in the mean square sense using discrete-time Markov jump linear system theory. Practical issues including current limitations of the 802.11 b protocol, the sampling policy and stability are highlighted. Simulation results on a cart-mounted inverted pendulum show that closed-loop stability can be improved using sample rate adaptation and that the control design criteria can be met in the presence of channel errors and severe channel contention.
Original languageEnglish
Pages (from-to)430-438
Number of pages9
JournalIET Control Theory and Applications
Volume1 (1)
Issue number1
Publication statusPublished - Jan 2007

ASJC Scopus subject areas

  • Computer Science Applications
  • Human-Computer Interaction
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Control and Optimization


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