Back to Search
Start Over
Bias-eliminated subspace model identification under time-varying deterministic type load disturbance.
- Source :
-
Journal of Process Control . Jan2015, Vol. 25, p41-49. 9p. - Publication Year :
- 2015
-
Abstract
- Unexpected or time-varying deterministic type load disturbances are often encountered when performing identification tests in practical applications. A bias-eliminated subspace identification method is proposed in this paper by developing an orthogonal projection approach to guarantee consistent estimation on the deterministic part of the plant, in combination with a Maclaurin time series approximation on the output response arising from deterministic type load disturbance. The rank condition for such an orthogonal projection is disclosed in terms of the state-space model structure adopted for identification. Using principal component analysis (PCA), the extended observability matrix and the lower triangular Toeplitz matrix of the state-space model are explicitly derived. Accordingly, the plant state-space matrices can be retrieved from the above matrices through a shift-invariant algorithm. A benchmark example from the literature and an illustrative example of industrial injection molding are used to demonstrate the effectiveness and merit of the proposed identification method. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09591524
- Volume :
- 25
- Database :
- Academic Search Index
- Journal :
- Journal of Process Control
- Publication Type :
- Academic Journal
- Accession number :
- 100512809
- Full Text :
- https://doi.org/10.1016/j.jprocont.2014.10.008