Accession Number : ADA307581

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

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

Corporate Author : CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY

Personal Author(s) : Bailey, Randall E. ; Bidlack, Timothy J.

PDF Url : ADA307581

Report Date : DEC 1995

Pagination or Media Count : 211

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.

Descriptors :   *AERODYNAMIC STABILITY, *HUMAN FACTORS ENGINEERING, DATA BASES, AERODYNAMIC CONFIGURATIONS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, FLIGHT TESTING, OPTIMIZATION, PITCH(MOTION), FLIGHT CONTROL SYSTEMS, TARGET ACQUISITION, DYNAMIC RESPONSE, PILOTS, SYSTEMS ANALYSIS, MAN MACHINE SYSTEMS, TARGET DETECTION, FLIGHT MANEUVERS, DESIGN CRITERIA, FIXED WING AIRCRAFT, FLIGHT PATHS, OSCILLATION, TIME DOMAIN, FREQUENCY DOMAIN, CLOSED LOOP SYSTEMS, HEAD UP DISPLAYS, ATTITUDE(INCLINATION).

Subject Categories : Aerodynamics
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE