0

Full Content is available to subscribers

Subscribe/Learn More  >

Robust Control of Magnetostrictive Actuators With Uncertain System

[+] Author Affiliations
Dinesh B. Ekanayake, Ram V. Iyer

Texas Tech University, Lubbock, TX

Paper No. SMASIS2008-541, pp. 429-436; 8 pages
doi:10.1115/SMASIS2008-541
From:
  • ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2
  • Ellicott City, Maryland, USA, October 28–30, 2008
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4332-1 | eISBN: 978-0-7918-3839-6
  • Copyright © 2008 by ASME

abstract

In this paper, the problem of designing a state feedback controller over a wide frequency range (0 – 1 kHz) for a magnetostrictive actuator connected to a mechanical system is discussed. Our model for the magnetostrictive actuator includes hysteresis, classical and excess eddy current losses. The hysteresis nonlinearity is modeled using a classical Preisach operator, and it is assumed that the density function is approximately known. The feedback controller achieves uniform ultimate boundedness — a property weaker than global asymptotic stability when the trajectory to be tracked is zero — in the presence of exogenous disturbances and uncertainty in the model. The main objective of the paper is to demonstrate that knowledge of the induced emf can be used to eliminate the need for hysteresis compensation in the control scheme. The novelty of this work is that we utilize the induced emf in the actuator coil as an observed variable, and also demonstrate how this quantity can be measured in real-time. Most controllers use inverse compensators to cancel out actuator hysteresis nonlinearity. We show that we can achieve uniform ultimate bounded control without an explicit inverse computation (using least squares minimization or otherwise).

Copyright © 2008 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In