damping – TechConnect Briefs

Physically-Based High-Level System Model of a MEMS-Gyroscope for the Efficient Design of Control Algorithms

Khalilyulin R., Schrag G., Wachutka G., Münich University of Technology, DE

We present a high-level model of a dual gimbaled mass gyroscope, which provides an accurate physical description of the impact of external and internal disturbances on the output signal, but which also allows for the [...]

Design and Manufacturing Concepts of Nanoparticle-reinforced Aerospace Materials

Kireitseu M.V., Tomlinson G.R., Basenuk V., Rolls-Royce Centre in Damping, the University of Sheffield, UK

Material and Fan Blade Design Concepts shown in fig. 1 are introduced as follows: 1) CNT-reinforced micro-balloons to be used to create syntactic foam (an two-part epoxy adhesive filled with micro-balloons) such that the density [...]

Analytic Damping Model for a Square Perforation Cell

Veijola T., Helsinki University of Technology, FI

A compact model for a square perforation cell is derived. It is generated both analytically and with 3D FEM simulations of the structure. The model consists of six flow resistances, whose values are simple functions [...]

Multiscale Modelling and Simulation of Nanoparticle-reinforced Damping Materials

Kireitseu M., Bochkareva L.V., Altenbach H., Tomlinson G., UIIP National Academy of Sciences of Belarus, BY

Nanoparticle-reinforced composite material is a relatively new vibration damping technology entailing placement of numerous nanoparticles inside vibrating material structure that has wide applica-tions in areas of transportation (aerospace, auto, rail, maritime) and electronics. Carbon nanotubes [...]

Vibration damping/dynamic properties of CNT-reinforced composite structures

Kireitseu M.V., Rolls-Royce Centre in Damping, the University of Sheffield, UK, UK

Energy dissipation (damping) in structures/materials is important as it reduces resonant amplitudes/noise levels giving enhanced integrity and life cycle behavior. If we then go to the nanoscale, the damping levels/dynamics of materials are mostly unknown [...]

Design and Manufacturing Concepts of Nanoparticle-reinforced Aerospace Materials

Kireitseu M.V., Tomlinson G.R., Basenuk V., Rolls-Royce Centre in Damping, the University of Sheffield, UK

Material and Fan Blade Design Concepts shown in fig. 1 are introduced as follows: 1) CNT-reinforced micro-balloons to be used to create syntactic foam (an two-part epoxy adhesive filled with micro-balloons) such that the density [...]

Macromodel Extraction of Gas Damping Effects for Perforated Surfaces with Arbitrarily-Shaped Geometries

Yang Y-J, Yu C-J, National Taiwan University, TW

In this work, we present an application of an Arnoldi-based model order reduction (MOR) technique on squeezed-film damping (SQFD) effects for arbitrarily-shaped perforated geometries. The compact models generated by this approach not only can be [...]

Modeling and Simulation of Micromachined Gyroscopes in the Presence of Imperfections

Shkel A., Howe R.T., Horowitz R., University of California-Berkeley, US

This paper studies behavior of non-ideal vibratory micromachined gyroscopes. The use of methods of motion decomposition [1] is the essence of the proposed analytical approach. The method is based on partitioning the equations of motion [...]