Automatic transfer function synthesis from a Bode plot

• Type: Article in International Conference Proceedings Book
• Date: 1990

Authors

P. Lopes dos Santos (Author) FEUP; Jorge Martins de Carvalho (Author) FEUP

Conference proceedings International

Title: Proceedings of the IEEE Conference on Decision and Control

Pages: 1093-1098

Proceedings of the 29th IEEE Conference on Decision and Control Part 6 (of 6)

Honolulu, HI, USA, 5 December 1990 through 7 December 1990

Indexing

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

CORDIS: Technological sciences > Engineering > Process engineering

Other information

Authenticus ID: P-008-NYZ

DOI: 10.1109/cdc.1990.203770

Abstract (EN): A novel algorithm that automatically identifies continuous-time transfer functions from Bode plots is presented. The identification is carried out in two stages. In the first one, the model order and 'good' guesses of the poles and zeros are obtained; in the second stage, estimates are refined by means of a modified Newton-Raphson algorithm. Because poles and zeros estimation only requires the magnitude curve, transport delays, if any, can be easily estimated by means of additional information supplied by the phase curve. The major and novel contribution of the proposed method resides in its first stage, where qualitative notions currently 'hidden' in the intuition of the designer are explicitly represented, yielding a simple optimization procedure that is not impaired by the presence of saddle points or local minima, and that converges very fast to the vicinity of the true solution. A detailed example is also provided to illustrate the value of the method.

Language: English

Type (Professor's evaluation): Scientific