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Model reduction by the simplified Routh approximation method (SRAM) is extended to produce biased models. The method uses only one Routh-type array to generate both numerator and denominator of the kth-order model. Computation of the time moments and Markov parameters of the retained system beforehand and solving the Pad? equation for the reduced numerator are not necessary. Numerical examples illustrate...
Model reduction by the simplified Routh approximation method (SRAM) is extended to produce reduced-order models directly in state-space form from the given system matrices in companion form. The method involves only one Routh-type array, and avoids the necessity for matrix inversion and multiplication of the system matrices and the use of recursive formulas. An example demonstrates its use.
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