نتایج جستجو برای: Spring-Dashpot-Mass Model

تعداد نتایج: 2542307  

Journal: :Plant physiology 1978
M D Fox L G Puffer

Recently it was demonstrated that holographic interferometry could be used to quantify minute displacements of a mature Stapelia variegata Linn. The previously unobtainable measurements revealed that the short term response of the stapelia was regular enough so that the dynamics could be evaluated through the use of a highly damped mass, spring, dashpot model. Such a model is derived explicitly...

M Hosseini S.M.R Khalili,

In this paper, static indentation and low velocity impact responses of a fully backed composite sandwich plate subjected to a rigid flat-ended cylindrical indenter/impactor are analytically investigated. The analysis is nonlinear due to nonlinear strain-displacement relation. In contrast to the existed analytical models for the indentation of composite sandwich plates, the stacking sequence of ...

2004
Mark B. Colton John M. Hollerbach

This paper addresses the problem of obtaining models of nonlinear mechanisms for use in virtual prototyping systems. The objective of the described modeling procedure is to more accurately represent the feel of complex mechanisms in force feedback applications. The model structure selected for this study is a 2-order impedance model, with mass, damping, stiffness, and coulomb friction that vary...

2010
S. Okubo K. Fukui X. Gao

Most rocks exhibit viscoelastic properties or time-dependent behavior during deformation. For example, peak strength and Young's modulus increase with loading rate in uniaxial compression tests. In the creep test, strain increases over time even though stress is maintained at a predetermined value. Such viscoelastic behavior is especially notable in porous rocks such as tuff and weathered rocks...

Journal: :The International journal of oral & maxillofacial implants 1998
T Kaneko

The Periotest percussion force acting on a dental implant was estimated by assuming a mass-spring-dashpot model of the implant-bone system constructed on the basis of a clinical experiment. A theoretical value of about 10 N, comparable to hitherto reported experimental values, was obtained for an osseointegrated implant of about 1 g. The percussion force would probably be smaller for a heavier ...

Journal: :Mathematical and Computer Modelling 2011
T.-P. Chang

In this paper, a simplified spring-dashpot model is proposed to represent the complicated nonlinear response of some viscoelastic materials. Recently, the viscoelastic modeling has been adopted by many researchers to characterize some parts of the human body in bioengineering and to simulate many material properties in mechanical engineering, electronic engineering and construction engineering....

1992
Homayoon S.M. Beigi

This paper presents a solution to the adaptive-control problem by considering a general discrete-time linear time-invariant dynamic model to be controlled. A new adaptive-control scheme is presented which uses an extension to the generalized secant method of solving a set of linear equations. 1] This new method is shown to signii-cantly outperform the self-tuning regulator in the control of two...

2006
Sajjad Fekri Michael Athans Antonio Pascoal

We evaluate the performance of the RMMAC methodology by considering a mass-spring-dashpot (MSD) system subject to high-frequency disturbances that strongly excite all its lightly-damped oscillatory modes. The results demonstrate the superior performance of the RMMAC and its variant RMMAC/XI architecture for a much more difficult adaptive control problem than that designed and analyzed in Ref. [...

2012
Claudiu Valentin Suciu Tsubasa Tobiishi Ryouta Mouri

In this work, three types of vehicle suspensions were considered and modeled as follows: oil damper mounted in parallel with a compression helical spring, for which a Kelvin-Voigt model, consisted of a dashpot and an elastic element connected in parallel is considered; colloidal damper without attached compression helical spring, for which a Maxwell model, consisted of a dashpot and an elastic ...

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