Accession Number : AD0730141

Title :   A Study of the Practicality of Active Vibration Isolation Applied to Aircraft during the Taxi Condition.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Corsetti,Charles Dominic

Report Date : JUN 1971

Pagination or Media Count : 166

Abstract : The feasibility of using an active control in the landing gear system of an aircraft to reduce wing fatigue damage resulting from ground induced vibrations during taxiing is considered. The characteristics of three vehicle models are discussed: a single landing gear system, a tricycle landing gear system and a system of five landing gears. Mathematical expressions for the runway inputs to each vehicle model are obtained in the form of random inputs represented by Gauss-Markov processes. The model for a linear hydraulic actuator which is used as the active control element in the landing gear system is presented. The results indicate that the combined optimal active control and landing gear system can provide a substantial improvement in reducing wing fatigue over that of the landing gear system alone. Also, the control parameters that are necessary and desirable in the optimal system, together with the physical demands placed on the actuator, are determined. (Author)

Descriptors :   (*LANDING GEAR, VIBRATION ISOLATORS), (*HYDRAULIC ACTUATORS, VIBRATION ISOLATORS), (*FATIGUE(MECHANICS), *TAXIING), WINGS, VIBRATION, DAMAGE, FEASIBILITY STUDIES, MATHEMATICAL MODELS, FEEDBACK, COSTS, THESES

Subject Categories : Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE