Accession Number : ADA307476

Title :   Unified Pilot-Induced Oscillation Theory, Volume 3. PIO Analysis Using Multivariable Methods.

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

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCE AN ENGINEERING

Personal Author(s) : Anderson, Mark R. ; Page, Anthony B.

PDF Url : ADA307476

Report Date : DEC 1995

Pagination or Media Count : 110

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 of the pilot, an undesired oscillation can result. However, the adaptive nature of the human pilot makes such oscillations difficult to predict. This report describes an analysis method capable of predicting PIO tendencies due to several simultaneous dynamic factors. A unified approach involving pilot modeling, stability robustness analysis, and multivariable describing function analysis is applied to the problem of identifying aircraft with PIO tendencies. The approach is shown to have ties to existing PIO criteria and is successfully applied to the prediction of PIO tendencies of the M2-F2 lifting body.

Descriptors :   *AERODYNAMIC STABILITY, DATA BASES, AERODYNAMIC CONFIGURATIONS, MATHEMATICAL MODELS, ALGORITHMS, COMPUTERIZED SIMULATION, SOFTWARE ENGINEERING, FLIGHT TESTING, FIGHTER AIRCRAFT, UNCERTAINTY, OPTIMIZATION, ADAPTIVE CONTROL SYSTEMS, PITCH(MOTION), YAW, FLIGHT CONTROL SYSTEMS, MULTIVARIATE ANALYSIS, PILOTS, HUMAN FACTORS ENGINEERING, AERODYNAMIC FORCES, SYSTEMS ANALYSIS, MAN MACHINE SYSTEMS, FLIGHT MANEUVERS, AVIATION SAFETY, OSCILLATION, DYNAMIC PRESSURE, CLOSED LOOP SYSTEMS, AILERONS, AERIAL RUDDERS, ATTITUDE(INCLINATION), LIFTING BODIES.

Subject Categories : Aerodynamics
      Military Aircraft Operations
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE