Developments of Adaptive Methods for Active Instability Control

Abstract

Adaptive algorithms are considered in many applications of active flow control. Independent on the controller type it is always necessary to provide in formation on the system to be controlled. A standard method is to identify the system in a first step and then provide the result to the controller. The secondary path information obtained is necessary for the proper convergence of the adaptive filter This two-step procedure is applicable in many cases but it is not sufficient when the system changes significantly during operation. This study focuses on self adaptive controllers operating with an on-line identification procedure. These systems are devised in this article to control aeroacoustic instabilities of the type found in segmented Solid rocket motors. Instabilities are driven by vortex shedding which are coupled by a resonant mode of the system. Two laboratory scale experiments are used as testbeds for the control schemes. Self adaptive control is compared with a standard adaptive method using an off-line identification procedure.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP011168

Entities

People

  • M. Mettenleiter
  • S. Candel

Organizations

  • National Center for Scientific Research

Tags

Communities of Interest

  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Algorithms
  • Combustion
  • Control Systems
  • Flow
  • Flow Rate
  • Frequency
  • Military Aircraft
  • Propulsion Systems
  • Rocket Engines
  • Solid Propellants
  • Standards
  • Steady State
  • Transfer Functions
  • Turbines
  • Vehicles
  • White Noise

Readers

  • Aviation Safety and Air Traffic Management
  • Software Engineering.
  • Team-Based Human-Centered Cognitive Task Decision Making and Information Performance.