Dynamic quantization of uncertain linear networked control systems

• Kun Liu ^[1] ; Emilia Fridman ^[2] ; Karl Henrik Johansson ^[3]
  1. [1] Beijing Institute of Technology

     Beijing Institute of Technology

     China

     
  2. [2] Tel Aviv University

     Tel Aviv University

     Israel

     
  3. [3] Royal Institute of Technology

     Royal Institute of Technology

     Suecia

     

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• Localización: Automatica: A journal of IFAC the International Federation of Automatic Control, ISSN 0005-1098, Vol. 59, 2015, págs. 248-255
• Idioma: inglés
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• Resumen

  • This paper is concerned with the stability analysis of networked control systems with dynamic quantization, variable sampling intervals and communication delays. A time-triggered zooming algorithm for the dynamic quantization at the sensor side is proposed that leads to an exponentially stable closed-loop system. The algorithm includes proper initialization of the zoom parameter. More precisely, given a bound on the state initial conditions and the values of the quantizer range and error, we derive conditions for finding the initial value of the zoom parameter, starting from which the exponential stability is guaranteed by using “zooming-in” only. Polytopic type uncertainties in the system model can be easily included in the analysis. The efficiency of the method is illustrated on an example of an uncertain cart–pendulum system.