Open AccessSaturation‐aware control design for micro–nano positioning systems
Author(s) -
Salton Aurélio T.,
AlGhanimi Ali,
V. Flores Jeferson,
Zheng Jinchuan,
Gomes da Silva João M.,
Fu Minyue
Publication year - 2017
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2017.0573
Subject(s) - control theory (sociology) , actuator , settling time , energy consumption , saturation (graph theory) , nano , bandwidth (computing) , computer science , control engineering , engineering , step response , control (management) , mathematics , electrical engineering , combinatorics , artificial intelligence , computer network , chemical engineering
This study proposes a non‐linear saturation‐aware controller for dual‐stage micro–nano actuators. Dual‐stage motion systems use two actuators in series in order to achieve an improved performance: a micro actuator responsible for a large range of actuation, and a nano actuator (NA) able to achieve a high bandwidth. The NA is commonly driven by flexure‐based piezoelectric actuators subject to a limited range which presents large oscillations in the presence of output saturation. In order to avoid these oscillations, a non‐linear smooth switching function that limits the actuation of the NA to only track references within its range is proposed. Experimental results demonstrate the effectiveness of the proposed approach, which is able to reduce oscillations and energy consumption without compromising settling time performance.