Vibration Suppression of a Rotationally Periodic Structure Using an Adaptive/PPF Control Law

Abstract

For a compressor disk, effective vibration suppression requires broadband control, and the elimination of inter-blade coupling forces. Previous researchers achieved this using an active/passive piezoelectric shunt network. Unfortunately, optimal tuning of the shunt requires prior knowledge of the coupling strength, which is not well defined. This thesis uses an adaptive parameter estimator to eliminate the inter-blade coupling forces. In addition, the passive shunt is replaced with an analogous positive position feedback method. The resulting control law was used on a simulated four and eight bladed system. While substantial reductions in system response were achieved for the Adaptive/PPF control technique, the parameter estimates did not always converge to the correct solution. Similar reductions in the response were achieved using PPF control by itself.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2001
Accession Number
ADA390169

Entities

People

  • Mark J. Keller

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Bandwidth
  • Broadband
  • Compressor Blades
  • Compressors
  • Control Systems
  • Control Theory
  • Engineering
  • Equations Of Motion
  • Feedback
  • Frequency
  • Resonant Frequency
  • Space Systems
  • Test And Evaluation
  • Turbines
  • Vibration

Readers

  • Linear Algebra
  • Robotics and Automation.