Squeeze-film Effects in Modelling Dynamic MEMS Devices ab 55.99 € als Taschenbuch: . Aus dem Bereich: Bücher, Wissenschaft, Technik,
Enhancing Squeeze Lifetimes ab 21.7 € als Taschenbuch: Modelling study on the impact of fracturing during squeezing to enable deeper placement of the inhibitor. Aus dem Bereich: Bücher, Wissenschaft, Geowissenschaft,
Squeeze-film Effects in Modelling Dynamic MEMS Devices ab 55.99 EURO
Applied Magnetofluid Dynamics: Modelling and Computation discusses a selection of advanced topics in linear and nonlinear flows of electrically-conducting fluids. It uses a differential equation model-building approach to study such phenomena, including in each chapter details of mathematical formulations, literature reviews, analytical and numerical solution procedures and interpretation. Many complex phenomena, not previously considered in other textbooks in magneto-fluid dynamics (MFD) are considered. These include resonance, magnetic squeeze films, non-Newtonian magneto-hydrodynamics and magneto-heat transfer from conical and rotating bodies. Applications of the models discussed range from magnetic materials processing to physiological flows and aerospace engineering. Complex variables, asymptotic methods, element free Galerkin methods, finite differences, MAPLE, homotopy, finite element, local nonsimilarity and network simulation methods are all described in detail.
This work studies the squeeze film effects in dynamic MEMS devices. The emphasis is on the development of compact analytical models due to their amenability in device level simulations using lumped parameters. To provide context to the current work first the computational efficacy of lumped parameter modelling of dynamic MEMS devices is demonstrated in MATLAB/Simulink software environment using a MEMS gyroscope and a MEMS microphone as examples. This is followed by a detailed comparative study of equivalent electrical circuit models for a MEMS microphone wherein the importance of accurate extraction of lumped mass, stiffness and damping due to squeeze film is brought into focus. Consistent expressions are derived for equivalent mass and stiffness of plate and beam structures using Rayleigh's energy methods. Discrepancies in modelling compressible squeeze film are brought out and the need for an in depth study of squeeze film behaviour is highlighted leading to a strong motivation for the development of compact squeeze film models.