Control of Hysteresis in Smart Actuators with Application to Micro-Positioning

Abstract

Hysteresis in smart material actuators makes the effective use of these actuators quite challenging. The Preisach operator has been widely used to model smart material hysteresis. Motivated by positioning applications of smart actuators, this paper addresses the value inversion problem for a class of discretized Preisach operators, i.e., to find an optimal input trajectory given a desired output value. This problem is solved through optimal state transition of a finite state machine (FSM) that corresponds to the discretized Preisach operator. A state-space reduction scheme for the FSM is developed, which significantly saves the memory and the computation time. As an example, micro-positioning control of a magnetostrictive actuator is investigated. Experimental results are presented to demonstrate the effectiveness of the proposed approach.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADA439774

Entities

People

  • John Baras
  • P.S.Krishnaprasad
  • Xiaobo Tan

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Actuators
  • Algorithms
  • Boundaries
  • Computations
  • Dynamics
  • Hysteresis
  • Inversion
  • Magnetic Fields
  • Magnetic Properties
  • Materials
  • Military Research
  • Models
  • Sequences
  • Trajectories
  • Transitions
  • Universities

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Robotics and Automation.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers