Accession Number : AD0446168

Title :   THE INFLUENCE OF STRUCTURAL ELASTICITY ON THE STABILITY OF AIRPLANES AND MULTI-STAGES MISSILES,

Corporate Author : ADVISORY GROUP FOR AERONAUTICAL RESEARCH AND DEVELOPMENT PARIS (FRANCE)

Personal Author(s) : Prince, Luther T.

Report Date : APR 1961

Pagination or Media Count : 62

Abstract : This provides root locus method for examining the influence of structural coupling on the stability of uncontrolled airplanes. The graphical technique permits a rapid but accurate quantitative evaluation of the effects of changes in aeroelastic and aerodynamic characteristics on airplane stability. Specific examples will illustrate the utility of the method. Problems involved in integrating a flexible vehicle into an automatic flight control system are also discussed. The similarity of the problem as it exists in manned airplanes and multi-stage missiles is presented. Examples are shown which illustrate the conventional (linear control) design approach to this problem. A promsing new approach utilizing adaptive (non-linear control) techniques is also presented. (Author)

Descriptors :   *AIRFRAMES, *AEROELASTICITY, STABILITY, AIRCRAFT, FUSELAGES, FLEXIBLE STRUCTURES, AERODYNAMIC CHARACTERISTICS, FLIGHT CONTROL SYSTEMS, AUTOMATIC PILOTS, GUIDED MISSILES, ROLL, MATHEMATICAL ANALYSIS, THEORY, ADAPTIVE CONTROL SYSTEMS, GUIDED MISSILES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE