Nader Ghareeb and R¨udiger Schmidt
Implementation of StateSpace and SuperElement Techniques for the Modeling and Control of Smart Structures with Damping Characteristics
399 - 408
2018
12
4
International Journal of Aerospace and Mechanical Engineering
https://publications.waset.org/pdf/10008838
https://publications.waset.org/vol/136
World Academy of Science, Engineering and Technology
Minimizing the weight in flexible structures means
reducing material and costs as well. However, these structures could
become prone to vibrations. Attenuating these vibrations has become
a pivotal engineering problem that shifted the focus of many research
endeavors. One technique to do that is to design and implement
an active control system. This system is mainly composed of a
vibrating structure, a sensor to perceive the vibrations, an actuator
to counteract the influence of disturbances, and finally a controller to
generate the appropriate control signals. In this work, two different
techniques are explored to create two different mathematical models
of an active control system. The first model is a finite element model
with a reduced number of nodes and it is called a superelement.
The second model is in the form of statespace representation, i.e.
a set of partial differential equations. The damping coefficients are
calculated and incorporated into both models. The effectiveness of
these models is demonstrated when the system is excited by its first
natural frequency and an active control strategy is developed and
implemented to attenuate the resulting vibrations. Results from both
modeling techniques are presented and compared.
Open Science Index 136, 2018