Title :
Identification of sampled data systems at frequencies beyond the Nyquist rate
Author :
Ehrlich, Rick ; Taussig, Carl ; Abramovitch, Daniel
Author_Institution :
NeXT Inc., Redwood City, CA, USA
Abstract :
A practical algorithm is presented for identifying the dynamics of a continuous-time, linear, time-invariant system, embedded in a sampled feedback loop with fixed sample time, T. It is shown that if the closed-loop configuration is stable, it is rather straightforward to design a set of experiments using a spectrum analyzer that will identify the plant transfer function to frequencies well beyond the Nyquist frequency. Experimental results are included
Keywords :
closed loop systems; feedback; identification; linear systems; sampled data systems; transfer functions; Nyquist rate; closed-loop configuration; continuous-time systems; linear systems; sampled data systems; sampled feedback loop; time-invariant system; transfer function; Control systems; Feedback loop; Frequency; Milling machines; Sampled data systems; Sampling methods; Signal analysis; Signal design; Signal processing; Transfer functions;
Conference_Titel :
Decision and Control, 1989., Proceedings of the 28th IEEE Conference on
Conference_Location :
Tampa, FL
DOI :
10.1109/CDC.1989.70198
