Multi-variable velocity feedback controller for piezoelectric tube scanner: A “mixed” negative-imaginary and small-gain approach

Author

Das, Sajal K. ; Pota, Hemanshu R. ; Petersen, Ian R.

Author_Institution

Sch. of Eng. & Inf. Technol., Univ. of New South Wales, Canberra, NSW, Australia

fYear

2013

Firstpage

5287

Lastpage

5292

Abstract

This paper presents the design and implementation of a multi-input multi-output (MIMO) velocity feedback controller (VFC) based on a recent theoretical results on “mixed” negative-imaginary and small-gain approach to damp the first resonant mode of a piezoelectric tube scanner (PTS) used in atomic force microscopes (AFMs). The identification of the MIMO dynamics of the PTS is done by using the measured data and the “mixed” negative-imaginary and small-gain approach is used to establish the internal stability between the PTS and the velocity feedback controller. Experimental results are presented to demonstrate the effectiveness of the proposed controller.

Keywords

atomic force microscopy; multivariable control systems; piezoelectric devices; velocity control; AFM; MIMO velocity feedback controller; VFC; atomic force microscopes; first resonant mode; mixed negative imaginary; multi input multi output; multivariable velocity feedback controller; piezoelectric tube scanner; small gain approach; Adaptive control; Closed loop systems; Damping; Electron tubes; Frequency control; Frequency response; Resonant frequency; atomic force microscope; multi-variable velocity feedback controller; negative-imaginary systems; piezoelectric; tube scanner.;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2013 32nd Chinese

Conference_Location

Xi´an

Type

conf

Filename

6640360