Effect of low-frequency vibration on workpiece in EDM processes

2011 ◽  
Vol 25 (5) ◽  
pp. 1231-1234 ◽  
Author(s):  
Gunawan Setia Prihandana ◽  
Muslim Mahardika ◽  
M. Hamdi ◽  
Kimiyuki Mitsui
Keyword(s):  
Low Frequency ◽  
Low Frequency Vibration

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

Ultra-low frequency vibration control of urban rail transit: the general quasi-zero-stiffness vibration isolator

2021 ◽  
pp. 1-18
Author(s):  
Liuchong Wang ◽  
Yannan Zhao ◽  
Tao Sang ◽  
Haiyang Zhou ◽  
Ping Wang ◽  
...  
Keyword(s):  
Vibration Control ◽  
Low Frequency ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Vibration Isolator ◽  
Low Frequency Vibration ◽  
Urban Rail

scholarly journals Influence of low-frequency vibration in Die Sinking EDM: a review

2021 ◽  
Vol 1104 (1) ◽  
pp. 012010
Author(s):  
Laxmi Devi ◽  
Kamlesh Paswan ◽  
Somnath Chattopadhyaya ◽  
Alokesh Pramanik
Keyword(s):  
Low Frequency ◽  
Low Frequency Vibration

Design Optimization of Low Power and Low Frequency Vibration Based MEMS Energy Harvester

2013 ◽  
Vol 475-476 ◽  
pp. 1624-1628
Author(s):  
Hasnizah Aris ◽  
David Fitrio ◽  
Jack Singh
Keyword(s):  
Low Power ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Geometry Optimization ◽  
Low Frequency ◽  
Substrate Thickness ◽  
Power Harvesting ◽  
Low Frequency Vibration ◽  
Length Width ◽  
Development And Utilization

The development and utilization of different structural materials, optimization of the cantilever geometry and power harvesting circuit are the most commonly methods used to increase the power density of MEMS energy harvester. This paper discusses the cantilever geometry optimization process of low power and low frequency of bimorph MEMS energy harvester. Three piezoelectric materials, ZnO, AlN and PZT are deposited on top and bottom of the cantilever Si substrate. This study focuses on the optimization of the cantilevers length, width, substrate thickness and PZe thickness in order to achieve lower than 600 Hz of resonant frequency. The harvested power for this work is in the range of 0.02 ~ 194.49 nW.

Stress Analysis of Sheet Metal Vibration Incremental Forming

2010 ◽  
Vol 154-155 ◽  
pp. 166-170
Author(s):  
Gai Pin Cai ◽  
Ning Yuan Zhu ◽  
Na Wen
Keyword(s):  
Sheet Metal ◽  
Incremental Forming ◽  
Low Frequency ◽  
Forming Process ◽  
Technical Parameters ◽  
Vibration Technique ◽  
Low Frequency Vibration ◽  
Metal Deformation ◽  
Angle Effect ◽  
Forming Angle

As a non-homogenous force stresses during incremental forming, sheet metal easily tended to instability, and some defects, such as deposition, wrinkle and fracture, would appear. If the vibration technique was combined the incremental forming process, its deformation mechanism would be different from that of the old process, and sheet metal deformation quality was also risen. Then some mechanical equations were built by force analyzed on element in local contact zone of die head forcing down. According to reasonable hypothesis and simplified, the equations were solved. Some stress-time curves of the element were obtained by given process parameters, vibrational parameters and time parameters. It is shown from analysis that stress variety of the element is closely related to amplitude, frequency and forming angle, effect of sheet metal vibration incremental forming with high frequency vibration is more superior than that of with low frequency vibration; only when vibrational parameters are reasonably matching technical parameters, the effective vibration incremental forming can be obtained.

Macro fiber composite-based low frequency vibration energy harvester

2015 ◽  
Vol 226 ◽  
pp. 126-136 ◽  
Author(s):  
Suna Ju ◽  
Song Hee Chae ◽  
Yunhee Choi ◽  
Chang-Hyeon Ji
Keyword(s):  
Energy Harvester ◽  
Fiber Composite ◽  
Low Frequency ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Low Frequency Vibration ◽  
Macro Fiber Composite
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