Abstract
Observability is a property of a dynamic system together with its observable inputs and outputs, according to which the latter alone suffice to determine exactly the state of the system. A data processor which performs state determination is called an “observer.” In an intuitive sense observability is a property dual to controllability: a system is controllable if any state can be reached by suitable choice of input; it is observable if (when the input is known) its state can be computed by suitable processing of the output. For linear time-invariant systems this intuitive duality translates into a precise algebraic duality.
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© 1985 Springer Science+Business Media New York
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Wonham, W.M. (1985). Observability and Dynamic Observers. In: Linear Multivariable Control. Applications of Mathematics, vol 10. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-1082-5_4
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DOI: https://doi.org/10.1007/978-1-4612-1082-5_4
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