Unified Pilot-Induced Oscillation Theory. Volume 4. Time-Domain Neal-Smith Criterion.

Abstract

This work was conducted as part of a USAF initiative to develop a comprehensive theory to predict pilot-induced oscillation (PIO) tendencies due to the combined effect of all influencing elements. A PIO is a very complicated phenomenon stemming from a dynamic interaction between the pilot and the aircraft. When tight control is required from the pilot, an undesired oscillation can result. However, the adaptive nature of the human pilot, makes such Oscillations difficult to predict. This report presents the theory, fundamental principles, and analytical procedures of a quantitative criterion for the prediction of PIO tendencies in fixed-wing aircraft. The criterion is validated against three very reliable flying qualities data bases. At present, the criterion is intentionally limited to the evaluation of pitch control only. No fundamental limitations were discovered which preclude the evolution of this methodology and analytical procedures to PIO analysis of roll control or 'outer-loop' longitudinal control, such as control of aircraft flight path.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1995
Accession Number
ADA307581

Entities

People

  • Randall E. Bailey
  • Timothy J. Bidlack

Organizations

  • Calspan

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Airframes
  • Classification
  • Closed Loop Systems
  • Control Surfaces
  • Control Systems
  • Databases
  • Dynamic Response
  • Fixed Wing Aircraft
  • Flight Control Systems
  • Flight Paths
  • Flight Testing
  • Frequency Domain
  • Schematic Diagrams
  • Test And Evaluation
  • Vehicles

Readers

  • Aviation Science / Aeronautics.
  • Control Systems Engineering.
  • Systems Analysis and Design

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers