Accession Number : ADA113996

Title :   Notes on Lateral-Directional Pilot Induced Oscillations.

Descriptive Note : Final rept. May 79-May 81,


Personal Author(s) : Smith,Ralph H

PDF Url : ADA113996

Report Date : Mar 1982

Pagination or Media Count : 84

Abstract : A method is developed for the assessment of lateral-directional pilot induced oscillation (PIO) tendencies. The method is applicable regardless of the flight control system mechanization. The relations between linear and non-linear system effects on the probability or nature of PIO are discussed. In its simplest form, the method proposed for PIO assessment is very similar to methods currently in use. The principal difference is that quantitative methods are provided for the identification of specific frequencies at which appropriate stability criteria must be satisfied if PIO is not to be a possibility. Based upon analyses in this report, the single axis, bank angle PIO is believed to be the most commonly encountered lateral-directional PIO. The possibility for pitch only PIO in the longitudinal mode is discussed. The methods of this report are believed to apply to the study of longitudinal PIO. (Author)

Descriptors :   *Pilots, *Man machine systems, *Oscillation, *Flight control systems, *Aircraft, Manual operation, Linear systems, Nonlinear systems, Handling, Dynamics, Orientation(Direction)

Subject Categories : Aircraft
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE