Discussion of “ Boundary Element‐Transfer Matrix Method for Plated Structures ” by Mitao Ohga, Tsunemi Shigematsu, and Takashi Hara (November, 1991, Vol. 117, No. 11)

1993 ◽  
Vol 119 (2) ◽  
pp. 412-413
Author(s):  
Giulio Maier ◽  
Giorgio Novati
Keyword(s):  
Boundary Element ◽  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Element Transfer

Boundary Element‐Transfer Matrix Method for Plated Structures

1991 ◽  
Vol 117 (11) ◽  
pp. 2509-2526 ◽  
Author(s):  
Mitao Ohga ◽  
Tsunemi Shigematsu ◽  
Takashi Hara
Keyword(s):  
Boundary Element ◽  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Element Transfer

Discrete Time Finite Element Transfer Matrix Method Development for Modeling and Decentralized Control

2015 ◽  
Author(s):  
Nick Cramer ◽  
Sean Swei ◽  
Kenny Cheung ◽  
M. Teodorescu
Keyword(s):  
Finite Element ◽  
Transfer Matrix ◽  
Discrete Time ◽  
Flight Control ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Structural Control ◽  
Method Development ◽  
Time Step ◽  
Element Transfer

The current emphasis on increasing aeronautical efficiency is leading the way to a new class of lighter more flexible airplane materials and structures, which unfortunately can result in aeroelastic instabilities. To effectively control the wings deformation and shape, appropriate modeling is necessary. Wings are often modeled as cantilever beams using finite element analysis. The drawback of this approach is that large aeroelastic models cannot be used for embedded controllers. Therefore, to effectively control wings shape, a simple, stable and fast equivalent predictive model that can capture the physical problem and could be used for in-flight control is required. The current paper proposes a Discrete Time Finite Element Transfer Matrix (DT-FETMM) model beam deformation and use it to design a regulator. The advantage of the proposed approach over existing methods is that the proposed controller could be designed to suppress a larger number of vibration modes within the fidelity of the selected time step. We will extend the discrete time transfer matrix method to finite element models and present the decentralized models and controllers for structural control.

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