Elastic wind-tunnel models for predicting longitudinal stability derivatives of elastic airplanes

1968 ◽  
Author(s):  
T. HOLGATE ◽  
J. ROSKAM
Keyword(s):  
Wind Tunnel ◽  
Longitudinal Stability ◽  
Stability Derivatives ◽  
Derivatives Of

Rotary Stability Derivatives from Distorted Models

1958 ◽  
Vol 62 (568) ◽  
pp. 307-308
Author(s):  
Y. Y. Chan ◽  
John R. Ward
Keyword(s):  
Wind Tunnel ◽  
Stability Derivatives ◽  
Line Theory ◽  
Lifting Line ◽  
Distorted Model ◽  
Derivatives Of ◽  
Lifting Line Theory

Foster and Haynes recently suggested the possibility of measuring the rotary stability derivatives of an aeroplane by testing a suitably distorted model in a wind tunnel. This possibility has been examined for an isolated wing by the authors and has been found to be in error for the derivatives due to rolling and yawing.In what follows it will be assumed that thin aerofoil theory and Prandtl’s lifting line theory may be applied.

scholarly journals A Preliminary Study of Parameter Estimation for Fixed Wing Aircraft and High Endurability Parafoil Aerial Vehicle

2020 ◽  
Vol 12 (4) ◽  
pp. 95-109
Author(s):  
Roli JAISWAL ◽  
Om PRAKASH ◽  
Sudhir Kumar CHATURVEDI
Keyword(s):  
System Identification ◽  
Dynamic Modelling ◽  
Mathematical Tool ◽  
Longitudinal Stability ◽  
Aerial Vehicles ◽  
Stability Derivatives ◽  
Aerial Vehicle ◽  
Identification Techniques ◽  
Derivatives Of ◽  
Powered Parafoil

High Endurability Aerial vehicle includes Airship, Powered parafoil aerial vehicle (PPAV). These flying aerial vehicles have excellent endurance and durability. Nowadays, research in lighter than air technology is pacing up fast. In the past years, the design and development of high endurable flying vehicle has grown due to their application in monitoring of floods/ drought, aerial photography, transportation, surveillance in terrain prone areas, reconnaissance missions etc. System Identification is a mathematical tool applied to develop mathematical model of any physical system based on measured data. Research on System Identification of these types of vehicles is on latest trends. Dynamic modelling of these types of vehicles is more complex than fixed wing aircraft. A detail Literature review in system Identification of PPAV and fixed wing aircraft is presented aiming to provide a source of information for researchers to make vehicle fully autonomous from manual controls. Various system Identification Techniques to estimate parameters of flying aerial vehicles are discussed. Longitudinal stability derivatives of fixed wing Hansa-3 aircraft and PPAV are compared. The methodology used in this study to estimate the longitudinal stability derivatives is ML Method. The results obtained in form of stability derivatives of Hansa-3 aircraft and Powered parafoil aerial vehicle are presented in tabular form. This study will give insight of identification techniques used to estimate parameters.

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