Diode laser soldering: a lumped parameter mathematical model and comparison of different optical soldering technologies

2003 ◽  
Author(s):  
Syed M. Naveed ◽  
Robert L. Woods
Keyword(s):  
Mathematical Model ◽  
Diode Laser ◽  
Lumped Parameter ◽  
Laser Soldering

Lumped Parameter Modeling of a Magnetorheological Fluid Clutch

2006 ◽  
Author(s):  
John C. Ulicny ◽  
Daniel J. Klingenberg ◽  
Anthony L. Smith ◽  
Zongxuan Sun
Keyword(s):  
Mathematical Model ◽  
Physical Properties ◽  
Magnetorheological Fluid ◽  
Input Current ◽  
Fluid Composition ◽  
Fluid Temperature ◽  
Temperature Range ◽  
Lumped Parameter ◽  
Lumped Parameter Modeling ◽  
Fan Speed

A lumped-parameter mathematical model of an automotive magnetorheological (MR) fluid fan clutch was developed. This model is able to describe the average fluid temperature, average clutch temperature, and output fan speed as a function of time, input current, and fluid composition. The model also reproduces numerous features of fan operation observed experimentally and revealed a mechanism for some observed cases of hysteresis. However, it fails to capture certain other features which lead us to conclude that phenomena which are not included in the model, e.g., sedimentation and re-suspension, are important to the clutch behavior. In addition, the results indicate that certain physical properties need to be measured over a larger temperature range in order for the model to better predict the clutch behavior.

Mechanical properties of QFP micro-joints soldered with lead-free solders using diode laser soldering technology

2008 ◽  
Vol 18 (4) ◽  
pp. 814-818 ◽  
Author(s):  
Zong-jie HAN ◽  
Song-bai XUE ◽  
Jian-xin WANG ◽  
Xin ZHANG ◽  
Liang ZHANG ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Diode Laser ◽  
Lead Free ◽  
Soldering Technology ◽  
Laser Soldering ◽  
Lead Free Solders

INTERNAL BALLISTICS OF CLASSIC GUN WITH COMPOSITE CHARGE

2019 ◽  
Vol 147 (3/2018) ◽  
pp. 47-62
Author(s):  
Marek Radomski
Keyword(s):  
Mathematical Model ◽  
Hard Core ◽  
Combustion Products ◽  
Maximum Pressure ◽  
Muzzle Velocity ◽  
Internal Ballistics ◽  
Lumped Parameter ◽  
Model Equations ◽  
Gun Firing ◽  
Composite Charge

The paper presents a lumped parameter mathematical model considering the changes of thermodynamic properties for combustion products of a composite propelling charge, and of a burning cartridge casing or shell as well, when shot with classic guns. In addition a method was proposed for considering not coincidental instants of ignition for particular components of the charge and also for powder grains of each component, and the heat flow into the walls containing the space with combustion products. Some results of numerical computations are shown for 125 mm 2A46 tank gun firing a hard core projectile. Moreover an evaluation of accuracy of the results is given on the basis of experimental data. Maximum pressure and muzzle velocity were basic criteria at the verification of the model. Analysis of accuracy for solutions of model equations allows a conclusion that the proposed mathematical model may be useful at the designing process of ammunition and guns.

A Mathematical Model for the Evaluation of Injection Molding Machine Control

1982 ◽  
Vol 104 (1) ◽  
pp. 86-92 ◽  
Author(s):  
A. Shankar ◽  
F. W. Paul
Keyword(s):  
Mathematical Model ◽  
Injection Molding ◽  
Transient Behavior ◽  
Control System Design ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Polymer Injection ◽  
Lumped Parameter ◽  
Polymer Injection Molding ◽  
The Mathematical Model

This paper presents the development of a deterministic nonlinear lumped parameter mathematical model useful for the study and design of polymer injection molding machines and their associated controllers. The mathematical model was simulated on a digital computer and the results compared with experimental measurements taken in an existing injection molding machine. A comparison of these results showed that the developed mathematical model adequately predicts the transient behavior of averaged machine and mold variables. The resulting model is useful for control system design, machine parameter selection, and model redesign purposes.

Potential use of diode laser soldering in middle ear reconstruction

2002 ◽  
Vol 31 (4) ◽  
pp. 242-246 ◽  
Author(s):  
Michael Ditkoff ◽  
Nikolas H. Blevins ◽  
Donald Perrault ◽  
Stanley M. Shapshay
Keyword(s):  
Diode Laser ◽  
Middle Ear ◽  
Ear Reconstruction ◽  
Laser Soldering ◽  
Middle Ear Reconstruction ◽  
Potential Use

Laser Soldering of Glass Materials Using Diode Laser

2006 ◽  
Author(s):  
Susanne Kasch ◽  
Hartmut Muller ◽  
Sebastian Wachter ◽  
Yvonne Guddei
Keyword(s):  
Diode Laser ◽  
Laser Soldering
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