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Time-domai implementatio of fractional order controllers

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2 Author(s)
Valério, D. ; Dept. of Mech. Eng., Tech. Univ. of Lisbon, Lisboa, Portugal ; da Costa, J.S.

Fractional order derivatives may be implemented i the time domai for control purposes i many ays. A exhaustive study of the performance of 28 different alternatives is presented and compared ith discretised Crone controllers. Placement of zeros and poles, impulse and step responses and frequency responses are addressed. No formula is clearly better tha all others i all situations, but it is expected that this survey ill allo the choosing of the best possibility for each particular case.

Published in:

Control Theory and Applications, IEE Proceedings -  (Volume:152 ,  Issue: 5 )