Saturation‐aware control design for micro–nano positioning systems. Issue 15 (1st August 2017)

• Record Type: Journal Article
• Authors: Salton, Aurélio T.; Al‐Ghanimi, Ali; V. Flores, Jeferson; Zheng, Jinchuan; Gomes da Silva, João M.; Fu, Minyue
• Is Part Of: IET control theory & applications. Volume 11:Issue 15(2017)
• Page Start: 2559
• Page End: 2566
• Publication Date: 2017-08-01
• Subjects: position control -- nonlinear control systems -- microactuators -- nanoactuators -- nonlinear functions; saturation‐aware control design -- micronano positioning systems -- nonlinear controller -- dual‐stage micronano actuators -- NA -- microactuator -- nanoactuator -- nonlinear smooth switching function; Control theory -- Periodicals; Automatic control -- Periodicals; 629.8312
• DOI: 10.1049/iet-cta.2017.0573
• Languages: English
• ISSNs: 1751-8644

Abstract

Abstract : 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.