Abstract
The problem of deriving reduced-order models of a higher-dimensional system from its state-space description is considered under the constraint that the model-reduction procedure should not involve the evaluation of system eigenvalues, should not involve any optimization algorthm and should yield a stable lower-order model for a stable system. The Routh-approximant modelling procedure in the frequency domain has the above characteristics. A time-domain adaptation of the Routh-approximant frequency-domain modelling procedure is presented to achieve the above objectives for s. i. s. o. systems. The lower-order time-domain model matrices are derived by a suitable truncation of the original system matrices in their gamma - delta canonic structure. The aggregation matrix relating the system and model state vectors is also derived. A numerical example is included.
Original language | English |
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Pages (from-to) | 1059-1063 |
Number of pages | 5 |
Journal | Proc Inst Electr Eng (London) |
Volume | 125 |
Issue number | 10 |
DOIs | |
State | Published - 1978 |