Identification and Control of Structural Systems

2009 ◽  
pp. 171-200
Author(s):  
O.S. Bursi ◽  
L. Vulcan ◽  
W. Salvatore ◽  
L. Nardini
Keyword(s):  
Structural Systems ◽  
And Control

scholarly journals Thermoelastic and Pyroelectric Couplings Effects on Dynamics and Active Control of Smart Piezolaminated Beam Modeled by Finite Element Method

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
M. Sanbi ◽  
R. Saadani ◽  
K. Sbai ◽  
M. Rahmoune
Keyword(s):  
Optimal Control ◽  
Finite Element ◽  
High Performance ◽  
Structural Systems ◽  
Control Procedure ◽  
Finite Element Approximations ◽  
Active Structures ◽  
Piezoelectric Beam ◽  
Control Electronics ◽  
And Control

Smart structures with integrated sensors, actuators, and control electronics are of importance to the next generation high-performance structural systems. In this study, thermopiezoelastic characteristics of piezoelectric beam continua are studied and applications of the theory to active structures in sensing and optimal control are discussed. Using linear thermopiezoelastic theory and Timoshenko assumptions, a generic thermopiezoelastic theory for piezolaminated composite beam is derived. Finite element equations for the thermopiezoelastic media are obtained by using the linear constitutive equations in Hamilton's principle together with the finite element approximations. The structure consists of a modeling of cantilevered piezolaminated Timoshenko beam with integrated thermopiezoelectric elements between two aluminium layers. The structure is modelled analytically and then numerically and the results of simulations are presented in order to visualize the states of their dynamics and the state of control. The optimal control LQG accompanied by the Kalman filter is applied. The effects of thermoelastic and pyroelectric couplings on the dynamics of the structure and on the control procedure are studied and discussed. We show that the control procedure cannot be perturbed by applying a thermal gradient and the control can be applied at any time during the period of vibration of the beam.

An Integrated Systems Approach for Design of Aerospace Structures

1988 ◽  
Vol 3 (2) ◽  
pp. 118-129
Author(s):  
K.K. Gupta
Keyword(s):  
Large Scale ◽  
Systems Approach ◽  
General Purpose ◽  
Aerospace Engineering ◽  
Integrated Systems ◽  
Structural Systems ◽  
Control Engineering ◽  
Analysis And Design ◽  
Dynamics And Control ◽  
And Control

This paper is primarily concerned with the analysis and design of structural systems relating to aeronautical and aerospace engineering. Some numerical formulations are presented that deal with the synthesis of these systems integrating such disciplines as structures, unsteady aero-dynamics and control engineering. A general-purpose finite element computer program developed for associated large-scale computations is also described in some detail. Finally, results of relevant numerical analyses pertaining to some representative aircraft and spacecraft, obtained by utilizing the program, are presented that testify to the efficacy of the currently developed solution procedures.

Sign in / Sign up

Export Citation Format

Share Document