Optimal boundary control for a second strain gradient theory-based beam model
Yükleniyor...
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Yildiz Technical University
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The second strain gradient theory is a non-classical continuum theory that captures the behavior of micrometer and nanometer sized beam structures. Timoshenko and Euler-Bernoulli theories are classical beam models that neglect the effects of small size structures when compared to the second strain gradient theory-based beam model. In this study, an optimal boundary control problem is formulated for the second strain gradient theory-based beam model to control free vibrations in the system. A quadratic performance index expressing the dynamic response of the system is to be minimized while an affordable control is in use. An indirect method based on Pontryagin's maximum principle is used to derive a necessary condition analytically for optimal control. Then, the problem is transformed into a system of partial differential equations consisting of state and costate (adjoint) variables together. The solution of the control problem is carried out using the computer codes produced in MATLAB (c). The effectiveness and competence of the introduced optimal boundary control are presented in numerical simulations.
Açıklama
Anahtar Kelimeler
Second Strain Gradient Theory-Based Beam, Boundary Control, Maximum Principle, Vibration
Kaynak
Sigma Journal of Engineering and Natural Sciences
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
37
Sayı
4
