Title :
Passive damping controller design for nanopositioners
Author :
Das, Sajal K. ; Pota, Hemanshu R. ; Petersen, Ian R.
Author_Institution :
Sch. of Eng. & Inf. Technol. (SEIT), Univ. of New South Wales at the Australian Defence Force Acad. (UNSW@ADFA), Canberra, ACT, Australia
Abstract :
A design of a passive damping controller to damp first resonant mode of a piezoelectric tube scanner (PTS) used in most commercial atomic force microscopes (AFMs) for nanopositioning is proposed in this paper. The stability analysis between the proposed controller and PTS is presented by an analytical framework which examines the finite-gain stability for a positive feedback interconnection between two stable, linear time-invariant systems where one system has “mixed” passivity, negative-imaginary and small-gain properties and the other system has “mixed” negative-imaginary, negative-passivity, and small-gain properties. Experimental results are presented to show the effectiveness of the proposed controller.
Keywords :
atomic force microscopy; control system synthesis; damping; feedback; linear systems; nanopositioning; optical scanners; piezoelectric devices; stability; AFM; PTS; atomic force microscopes; finite-gain stability; first resonant mode; linear time-invariant systems; mixed negative-imaginary; mixed passivity; nanopositioners; nanopositioning; negative-passivity; passive damping controller design; piezoelectric tube scanner; positive feedback interconnection; small-gain properties; stability analysis; Atomic force microscopy; Damping; Electron tubes; Force; Nickel; Sensors; Control applications; Nano systems; Smart structures;
Conference_Titel :
American Control Conference (ACC), 2014
Conference_Location :
Portland, OR
Print_ISBN :
978-1-4799-3272-6
DOI :
10.1109/ACC.2014.6858901
