A Micromachined Contactless Suspension With Zero Spring Constant

2012 ◽  
Author(s):  
Kirill Poletkin
Keyword(s):  
Mathematical Model ◽  
Proof Mass ◽  
Spring Constant ◽  
Micromachined Sensors

In this paper, a micromachined contactless suspension with a zero spring constant that provides possibility to significantly increasing sensitivity of micromachined sensors is studied. Minimization of the spring constant of the contactless suspension is achieved by combining inductive and electric contactless suspensions. In particular, the conditions required to eliminate the spring constant of the suspension and achieve stable levitation of the disk shaped proof mass are obtained based on the analysis of developed mathematical model of the suspension. It is shown that such a suspension can be developed in principle.

Evaluations of Blom-Singer Tracheoesophageal Puncture Prostheses Performance

1983 ◽  
Vol 26 (3) ◽  
pp. 459-464 ◽  
Author(s):  
Jerald B. Moon ◽  
John Sullivan ◽  
Bernd Weinberg
Keyword(s):  
Mathematical Model ◽  
Airway Resistance ◽  
Empirical Studies ◽  
Spring Constant ◽  
One Dimensional ◽  
Relative Contribution ◽  
Theoretical Approaches ◽  
Average Resistance ◽  
Tracheoesophageal Puncture ◽  
Major Factors

Emperical and theoretical approaches to the assessment of Blom-Singer tracheoesophageal puncture prosthesis performance are described in this paper. The results of empirical studies provide new insights about the behavior of Blom-Singer devices. Namely, the overall average resistance (about 126 cm H 2 O/LPS) of these devices stems from two major factors: air entrance and air exit effects. The magnitudes of airway resistance for each of these factors and the relative contribution each factor makes to the total airway resistance of these prostheses are delineated. The performance of these devices and modifications thereof are shown to be characterized and predicted quite well using a one-dimensional, spring-constant mathematical model.

Toothed Belt-Load Distribution

1983 ◽  
Vol 105 (3) ◽  
pp. 339-347 ◽  
Author(s):  
M. R. Naji ◽  
K. M. Marshek
Keyword(s):  
Mathematical Model ◽  
Friction Force ◽  
Coefficient Of Friction ◽  
Material Properties ◽  
Load Distribution ◽  
Experimental Results ◽  
Spring Constant ◽  
Pitch Difference ◽  
Toothed Belt ◽  
The Mathematical Model

A mathematical model was developed to study the effect on belt load distribution of belt material properties, pitch variations, friction force, and pulley rotation. Results are presented which show the influence on load distribution of pitch difference, tight side tension, slack side tension, belt tooth spring constant, and coefficient of friction, for the belt on stationary, driver, and driven pulleys. Data from the mathematical model compared well with experimental results available in the literature.

scholarly journals Modeling and Simulation of Capacitive MEMSComb Accelerometer for sensitivity improvement with different Proof Mass Patterns

2019 ◽  
Vol 8 (6) ◽  
pp. 1655-1660
Keyword(s):  
Modeling And Simulation ◽  
Proof Mass ◽  
Three Dimensional ◽  
Inertial Force ◽  
Beam Width ◽  
Spring Constant ◽  
Optimum Selection ◽  
Displacement Sensitivity ◽  
Sensitivity Improvement ◽  
Two Sides

This Paper presents the sensitivity of a design for three dimensional comb type beam structure based accelerometer. Initially the basic comb accelerometer is developed and displacement sensitivity is observed by modeling and simulation. It is observed that accelerometer sensitivity is improved through the optimum selection of parameters via number of fingers, beam length, beam width, mass width, , spring constant. The movable proof mass is connected to two anchors. The movable fingers are connected to the two sides of the proof mass. Every movable finger consists of two fixed fingers are connected to the left and right respectively. Any acceleration along the direction on movable mass, it will induce the inertial force and deflect the beam. Hence the capacitance will performed in between fixed and movable fingers. By changing the parameters like fingers width, number of fingers, proof mass shape, and spring constant the displacement is changed .By adjusting these parameters corresponding sensitivity can be improved

Mathematical model of hit phenomena and its application to movie advertisement

2008 ◽  
Author(s):  
Ishii Akira ◽  
Yoshida Narihiko ◽  
Hayashi Takafumi ◽  
Umemura Sanae ◽  
Nakagawa Takeshi
Keyword(s):  
Mathematical Model
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