Accession Number : ADA307580

Title :   Unified Pilot-Induced Oscillation Theory. Volume 1. PIO Analysis with Linear and Nonlinear Effective Vehicle Characteristics, Including Rate Limiting.

Descriptive Note : Final rept. Oct 94-Sep 95,

Corporate Author : SYSTEMS TECHNOLOGY INC HAWTHORNE CA

Personal Author(s) : Klyde, David H. ; McCruer, Duane T. ; Myers, Thomas T.

PDF Url : ADA307580

Report Date : DEC 1995

Pagination or Media Count : 300

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. The independent research of STI included: compilation of available PIO time histories and references as an initial step toward a comprehensive PIO database; refinement of the proposed PIO categories defined in NASA CR-4683; development of PIO theories based on these categories; development of methods to handle the higher frequency and nonlinear aspects of PIO analysis with an emphasis on rate limiting; and a review of existing and proposed linear PIO criteria.

Descriptors :   *AERODYNAMIC STABILITY, *HUMAN FACTORS ENGINEERING, DATA BASES, AERODYNAMIC CONFIGURATIONS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, LINEAR SYSTEMS, FLIGHT TESTING, FIGHTER AIRCRAFT, POSITION(LOCATION), PITCH(MOTION), FLIGHT CONTROL SYSTEMS, DYNAMIC RESPONSE, PILOTS, CASE STUDIES, HELICOPTERS, MATHEMATICAL PREDICTION, APPROXIMATION(MATHEMATICS), SYSTEMS ANALYSIS, NONLINEAR ANALYSIS, MAN MACHINE SYSTEMS, FLIGHT MANEUVERS, OSCILLATION, FREQUENCY RESPONSE, CLOSED LOOP SYSTEMS, ATTITUDE(INCLINATION).

Subject Categories : Aerodynamics
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE