Identification and Control for Nonlinear Systems with Applications to Aerospace Vehicles

Abstract

The achievements and the research results of our research program for the past three years arc summarized in this final report. We have developed new methods to robust model identification and robust control design for complex nonlinear uncertain systems with Air Force problems as application platforms. The primary focus of our research program has been on rotating stall and combustion instabilities which are the two primary constraints for performance improvement of future aeroengines. Both involve complicated flow patterns, and exhibit rich nonlinear dynamics with non-equilibrium steady state behavior. We have developed new modeling and control algorithms to approach nonlinear oscillatory systems. For compressor control, we employed bifurcation stabilization approach, and are able to control rotating stall for the multi-mode MooreGreitzer model. For combustion control, we are able to apply H^ robust control method to suppress nonlinear vibrations. Our research results have benefited Air Force Research Labs. in WPAFB, and aeroengine industry. For fault detection/identification, and reconfigurable flight control, we also made great progress. A new feedback control architecture has been developed that has the potential to overcome many conflicting problems in standard feedback control and provide a unified framework for robust and fault tolerant control. In addition we have made progress in system identification and robus control for several important aspects that will be described in this final report. The research objectives as proposed in our proposal have been accomplished successfully as demonstrated in the 30 journal publications, one book, two book chapters, and 25 conference papers we have had for the past three years, including those accepted for publication.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2002
Accession Number
ADA405744

Entities

People

  • Guoxiang Gu
  • Kemin Zhou

Organizations

  • Louisiana State University

Tags

Communities of Interest

  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Adaptive Control Systems
  • Aerospace Craft
  • Air Force
  • Algorithms
  • Closed Loop Systems
  • Combustion
  • Compressors
  • Control Systems
  • Detection
  • Feedback
  • Frequency Domain
  • Mechanical Engineering
  • Nonlinear Dynamics
  • Nonlinear Systems
  • Standards
  • Steady State
  • Vehicles

Readers

  • Control Systems Engineering.
  • Systems Analysis and Design
  • Technical Research and Report Writing.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers