LUMPED PARAMETER REPRESENTATION OF A LONGITUDINALLY VIBRATING ELASTIC ROD VISCOUSLY DAMPED IN-SPAN

1998 ◽  
Vol 216 (2) ◽  
pp. 328-336 ◽  
Author(s):  
N.A. Hizal ◽  
M. Gürgöze
Keyword(s):  
Elastic Rod ◽  
Parameter Representation ◽  
Lumped Parameter

Modelling of Geared Multi-Rotor System

2013 ◽  
Vol 198 ◽  
pp. 669-674 ◽  
Author(s):  
Cezary Orlikowski ◽  
Rafał Hein
Keyword(s):  
Rotor System ◽  
Nonlinear Phenomena ◽  
Final Model ◽  
Lumped Model ◽  
Gear Mesh ◽  
Shaft System ◽  
Parameter Representation ◽  
Lumped Parameter ◽  
Linear And Nonlinear ◽  
Low Order

In this paper the method of modelling a speed-varying geared rotor system is presented. The proposed approach enables us to obtain an accurate low-order lumped parameter representation of the investigated system. The final model consists of reduced modal models of an undamped beam/torsional shaft system as well as a spatially lumped model of other linear and nonlinear phenomena including gear mesh interaction.

Missile captive firing, modelling and control

1998 ◽  
Vol 212 (1) ◽  
pp. 31-43 ◽  
Author(s):  
R Whalley ◽  
M Ebrahimi
Keyword(s):  
Feedback Control ◽  
Dynamic Model ◽  
External Load ◽  
Solid Propellant ◽  
Thrust Vectoring ◽  
Analysis Techniques ◽  
Parameter Representation ◽  
Lumped Parameter ◽  
And Control

The pitch plane manoeuvring characteristics of a solid propellant missile under captive firing conditions are considered. Analysis techniques are used to establish the dynamic model of the suspended, lumped parameter representation of the vehicle, which is regulated directionally by thrust vectoring. Three-term feedback control is employed to confine the response of the system to both demanded input changes and external load disturbances from airstream turbulence and defensive projectile debris strikes. Simulated manoeuvring characteristics are computed for demonstration purposes.

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