| Separation Principles for Input-Output and Integral-Input-to-State Stability (2004) | |||||||||||||||||
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| We present new characterizations of input-output-to-state stability. This is a notion of detectability formulated in the ISS (input-to-state stability) framework. Equivalent properties are presented in terms of asymptotic estimates of the state trajectories based on the magnitudes of the external input and output signals. These results provide a set of separation principles for input-output-to-state stability---characterizations of the property as conjunctions of weaker stability notions. When applied to the notion of integral ISS, these characterizations yield analogous results. Key words. nonlinear systems, input-to-output stability, detectability, Lyapunov method AMS subject classifications. 93D20, 93D05, 93D09 DOI. 10.1137/S0363012902419047 1. | |||||||||||||||||
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