The cryogenic refocusing mechanism of NIRSpec opto-mechanical design, analysis, and testing

2008 ◽  
Author(s):  
Matteo Taccola ◽  
Giorgio Bagnasco ◽  
Reiner Barho ◽  
Giulio Cesare Caprini ◽  
Marco Di Giampietro ◽  
...  
Keyword(s):  
Mechanical Design ◽  
Design Analysis

Mechanical Design Analysis and Test in Support of the Market Introduction of a New Vehicle

2004 ◽  
Vol 1-2 ◽  
pp. 37-44
Author(s):  
R.H. Cornish ◽  
M. Srai ◽  
P. Cowen ◽  
M. Welch ◽  
Mike Daniels
Keyword(s):  
Knowledge Transfer ◽  
Dynamic Model ◽  
High Power ◽  
Mechanical Design ◽  
Design Analysis ◽  
Drive Shaft ◽  
Power Train ◽  
Vehicle Development ◽  
First Case ◽  
High Torque

This paper reports results from a stress, acoustics and vibration investigation of the ride and driveline components of a new 2-seater sports car. The work was aimed at giving design assurance information to designers and vehicle engineers working to compressed timescales. The paper focuses on two particular areas: design of the power train for NVH refinement, and design analysis of a suspension wishbone. In the first case, a dynamic model of drive shaft torsion effects was created to understand design relationships needed for high power, high torque performance car. In the second case, an investigation was made into the integrity of a suspension wishbone component when gauge thickness was reduced from 3 mm to 2 mm. The work described was carried out in a joint industry academic venture sponsored by Knowledge Transfer Partnership (KTP). It is from this background that the authors give some perspectives on vehicle development.

scholarly journals Mechanical design, analysis and testing of a large-range compliant microgripper

2016 ◽  
Vol 7 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Yilin Liu ◽  
Qingsong Xu
Keyword(s):  
Large Range ◽  
Mechanical Design ◽  
Experimental Testing ◽  
Design Analysis ◽  
Element Analysis ◽  
Amplification Ratio ◽  
Testing Procedures ◽  
Dual Stage ◽  
Fea Simulation ◽  
Simulation Results

Abstract. This paper presents the mechanical design, analysis, fabrication, and testing procedures of a new large-range microgripper which is based on a flexible hinge structure. The uniqueness of the gripper is that the gripper arms not only provide large gripping range but also deliver approximately rectilinear movement as the displacement in nonworking direction is extremely small. The large gripping range is enabled by a mechanism design based on dual-stage flexure amplifier to magnify the stroke of piezoelectric actuator. The first-stage amplifier is a modified version of the Scott Russell (SR) mechanism and the second-stage amplifier contains a parallel mechanism. The displacement amplification ratio of the modified SR mechanism in the gripper has been enlarged to 3.56 times of the conventional design. Analytical static models of the gripper mechanism are developed and validated through finite-element analysis (FEA) simulation. Results show that the gripping range is over 720 µm with a resonant frequency of 70.7 Hz and negligible displacement in nonworking direction. The total amplification ratio of the input displacement is 16.13. Moreover, a prototype of the gripper is developed by using aluminium 7075 for experimental testing. Experimental results validate the analytical model and FEA simulation results. The proposed microgripper can be employed in various microassembly applications such as pick-and-place of optical fibre.

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