Residual Models and Stochastic Realization in State-Space Identification
Author
Summary, in English
This paper presents theory and algorithms for validation in system identification of state-space models from finite input-output sequences in a subspace model identification framework. Our formulation includes the problem of rank-deficient residual covariance matrices, a case which is encountered in applications with mixed stochastic-deterministic input-output properties as well as for cases where outputs are linearly dependent. Similar to the case of prediction-error identification, it is shown that the resulting model can be decomposed into an input-output model and a stochastic innovations model. Using the Riccati equation, we have designed a procedure to provide a reduced-order stochastic model that is minimal with respect to system order as well as the number of stochastic inputs thereby avoiding several problems appearing in standard application of stochastic realization to the model validation problem.
Department/s
Publishing year
2001
Language
English
Pages
988-995
Publication/Series
International Journal of Control
Volume
74
Issue
10
Document type
Journal article
Publisher
Taylor & Francis
Topic
- Control Engineering
Status
Published
ISBN/ISSN/Other
- ISSN: 0020-7179