Accession Number:

ADA453933

Title:

Model Development and Inverse Compensator Design for High Speed Nanopositioning

Descriptive Note:

Conference paper

Corporate Author:

NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION

Report Date:

2002-01-01

Pagination or Media Count:

7.0

Abstract:

This paper focuses on the development of constitutive models, commensurate system models, and inverse compensator construction for high speed nanopositioning in atomic force microscopes AFM. All current AFM employ either stacked or cylindrical piezoceramic actuators for both longitudinal and transverse positioning of the sample. An inherent property of these materials is the presence of hysteresis and constitutive nonlinearities, even at the low drive levels employed for angstrom-level resolution. At low frequencies, standard feedback mechanisms effectively attenuate the hysteresis, whereas noise at high frequencies diminishes the efficacy of feedback and leads to unacceptable accuracy. In this paper, we discuss modeling techniques which provide a first step toward high speed nanopositioning for applications ranging from macroscopic product evaluation to real-time imaging of biological processes.

Subject Categories:

  • Electrical and Electronic Equipment
  • Optics
  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE