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Routh-type \(L_2\) model reduction revisited. (English) Zbl 1449.93091
Summary: A computationally simple method for generating reduced-order models that minimise the \(L_2\) norm of the approximation error while preserving a number of second-order information indices as well as the steady-state value of the step response, is presented. The method exploits the energy-conservation property peculiar to the Routh reduction method and the interpolation property of the \(L_2\)-optimal approximation. Two examples taken from the relevant literature show that the suggested techniques may lead to approximations that are not worse than those afforded by popular more cumbersome techniques.
93C05 Linear systems in control theory
93A15 Large-scale systems
93B11 System structure simplification
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