TY - JOUR
T1 - How Far Should Poles Be Placed? Selecting Positive Feedback Controllers for Damping and Tracking Applications
T2 - A Complete Characterisation
AU - Maclean, James
AU - Aleyaasin, Majid
AU - Aphale, Sumeet S.
PY - 2022/9/20
Y1 - 2022/9/20
N2 - Designers of Positive Feedback Controllers (PFCs) arbitrarily place poles into the left-hand half-plane of the complex plane without any detailed understanding of where to stop. This works aims to clearly demonstrate, via rigorous mathematical derivation, the conditions for which pole–placement becomes possible. It also highlights the design limits for the family of second–order PFCs—the most popular PFC group. To this end, the complete family of PFCs, namely, Positive Acceleration Velocity Position Feedback and its derivatives, are analysed in great depth with respect to pure damping and also with respect to combined damping and tracking applications. To showcase the practical value and validity of this work, experimental results on a piezoelectric nanopositioner are also presented and discussed.
AB - Designers of Positive Feedback Controllers (PFCs) arbitrarily place poles into the left-hand half-plane of the complex plane without any detailed understanding of where to stop. This works aims to clearly demonstrate, via rigorous mathematical derivation, the conditions for which pole–placement becomes possible. It also highlights the design limits for the family of second–order PFCs—the most popular PFC group. To this end, the complete family of PFCs, namely, Positive Acceleration Velocity Position Feedback and its derivatives, are analysed in great depth with respect to pure damping and also with respect to combined damping and tracking applications. To showcase the practical value and validity of this work, experimental results on a piezoelectric nanopositioner are also presented and discussed.
U2 - 10.3390/vibration5040038
DO - 10.3390/vibration5040038
M3 - Article
SN - 2571-631X
VL - 5
SP - 641
EP - 658
JO - Vibration
JF - Vibration
IS - 4
ER -