Channel Signal-to-Noise Ratio Constrained Feedback Control: Performance and Robustness
Rojas, A.J. and Braslavsky, J.H. and Middleton, R.H. (2009) Channel Signal-to-Noise Ratio Constrained Feedback Control: Performance and Robustness. IET Control Theory and Applications, 2 (7). pp. 595-605. ISSN 1751-8644
The limitations in performance and robustness imposed by explicitly considering a communication channel in a control loop have received increased attention in recent years. Previous results in the literature have stated these limitations in terms of a minimal transmission data rate necessary for stabilisation. In this paper a signal-to-noise ratio (SNR) approach is used to study two specific cases: (i) performance in terms of model matching and (ii) robustness against a multiplicative uncertainty in the plant model. The analysis performed leads to closed-form expressions that allow the quantification of the extra SNR required in both cases.
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