Efficient DFT-based model reduction for continuous systems

Efficient DFT-based model reduction for continuous systems

A method for online identification of reduced-order models (ROM) of stable continuous systems is presented. The method is unique because it utilizes the moving discrete Fourier transform (MDFT) to continuously monitor the frequency-domain profile of the plant input and output signals. These signals...

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Veröffentlicht in:IEEE transactions on automatic control 1991-10, Vol.36 (10), p.1188-1193
1. Verfasser: Lilly, J.H.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Computer science
control theory
systems
Computer simulation
Computerized monitoring
Condition monitoring
Continuous time systems
Control theory. Systems
Discrete Fourier transforms
Discrete transforms
Exact sciences and technology
Fourier transforms
Frequency estimation
Modelling and identification
Read only memory
Reduced order systems
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Zusammenfassung:A method for online identification of reduced-order models (ROM) of stable continuous systems is presented. The method is unique because it utilizes the moving discrete Fourier transform (MDFT) to continuously monitor the frequency-domain profile of the plant input and output signals. These signals need not be sinusoidal, although they must be accurately represented by their DFTs. Also, the input must contain at least n frequency components (for an nth-order ROM). A computer simulation demonstrates the method.< >
ISSN:0018-9286
1558-2523
DOI:10.1109/9.90233