Arşiv ve Dokümantasyon Merkezi
Dijital Arşivi

Design of an adaptive - passive dynamic vibration absorber composed of a string - mass system equipped with negative stiffness tension adjusting mechanism

Basit öğe kaydını göster

dc.contributor Graduate Program in Mechanical Engineering.
dc.contributor.advisor Yılmaz, Çetin.
dc.contributor.author Acar, Mustafa Ali.
dc.date.accessioned 2023-03-16T11:15:39Z
dc.date.available 2023-03-16T11:15:39Z
dc.date.issued 2011.
dc.identifier.other ME 2011 A33
dc.identifier.uri http://digitalarchive.boun.edu.tr/handle/123456789/14965
dc.description.abstract In this study, a new adaptive-passive dynamic vibration absorber design is discussed. This proposed design is composed of a stiff string under tension with a central mass attachment as a dynamic vibration absorber (DVA), a negative stiffness mechanism as a string tension adjustment aid and a tuning controller to make it adaptive. Dynamic properties of adaptive-passive DVA systems are adjusted in real-time by generally varying their stiffness. The adaptive-passive DVA design subject to this thesis uses the string tension as a tuning parameter. The dependency of the natural frequencies of this system on the string tension is analyzed using finite element method and verified analytically. Additionally, a method for adjusting the string tension with almost zero effort is proposed. To achieve this goal, the design incorporated a negative stiffness element to create a quasi-zero stiffness and constant zero-force mechanism when combined with the string. Force-displacement analysis of a system composed of a pre-loaded spring and a rigid link is examined analytically. It was shown that the system can have constant negative stiffness behavior. A string tension adjustment algorithm is created which tunes the DVA system depending on the magnitude and frequency of the most dominant component of the vibration signal. Finally, a prototype of the complete design is built. A series of experimental procedures are conducted on the prototype with the intention of verifying the theoretical calculations. Results obtained from these experiments are also given in the thesis.
dc.format.extent 30 cm.
dc.publisher Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011.
dc.relation Includes appendices.
dc.relation Includes appendices.
dc.subject.lcsh Autonomous robots.
dc.subject.lcsh Intelligent agents (Computer software)
dc.title Design of an adaptive - passive dynamic vibration absorber composed of a string - mass system equipped with negative stiffness tension adjusting mechanism
dc.format.pages xxiii, 184 leaves ;


Bu öğenin dosyaları

Bu öğe aşağıdaki koleksiyon(lar)da görünmektedir.

Basit öğe kaydını göster

Dijital Arşivde Ara


Göz at

Hesabım