K11200 Developments of Material and Manufacturing Method for Increasing Surface Durability of the Power Transmission Gears : Experimental Results Obtained at the University Laboratory

2015 ◽  
Vol 2015 (0) ◽  
pp. _K11200-1_-_K11200-5_
Author(s):  
Tsutomu NAKANISHI
Keyword(s):  
Power Transmission ◽  
Experimental Results ◽  
Manufacturing Method ◽  
Surface Durability ◽  
The University ◽  
University Laboratory

Geometrical design of skew conical involute gear drives in approximate line contact

2009 ◽  
Vol 223 (9) ◽  
pp. 2201-2211 ◽  
Author(s):  
S H Wu ◽  
S J Tsai
Keyword(s):  
Power Transmission ◽  
Design Approach ◽  
Line Contact ◽  
Contact Sensitivity ◽  
Axis Ratio ◽  
Edge Contact ◽  
Involute Gear ◽  
Surface Durability ◽  
Gear Drives ◽  
Conical Gear

A novel design for skew conical involute gear drives in approximate line contact is proposed. Such a drive has a contact ellipse with a large major-to-minor-axis ratio, which allows it to overcome the weakness of conical gear drives for application in power transmission. This gearing design approach is characterized by reduced edge contact sensitivity and increased surface durability. The edge contact sensitivity that can arise with this kind of gear drive due to assembly or manufacturing errors is evaluated by analysing the value of the shift of the line of action caused by such errors. The surface durability is evaluated by calculating the Hertz stress. Some guidelines are developed based on the analysis of the influence of the gearing parameters on the edge contact sensitivity and the surface durability made possible using this design approach for conical gear drives in the approximate line contact. The guidelines are summarized and, finally, a practical example is given to demonstrate the feasibility of the approximate line contact design.

Modeling and experimental investigation of out-of-plane deformation on mechanical performance of composites manufactured by ATL

2016 ◽  
Vol 36 (5) ◽  
pp. 347-359 ◽  
Author(s):  
Qiyi Chu ◽  
Yong Li ◽  
Jun Xiao ◽  
Dajun Huan ◽  
Xiaodong Chen
Keyword(s):  
Tensile Strength ◽  
Deformation Rate ◽  
Mechanical Performance ◽  
Plane Deformation ◽  
Experimental Results ◽  
Predicting Model ◽  
Fiber Waviness ◽  
Manufacturing Method ◽  
Four Point Bending ◽  
Out Of Plane

The change of mold normal curvature along the trajectory may result in out-of-plane waviness during the automated laying process, on which the layup speed and temperature would have an effect. A new parameter, deformation rate, was defined by combining the effect of mold curvature change rate and layup speed. A predicting model was proposed based on the fiber waviness and interlaminar sliding model to calculate the relationship between stiffness retention and the layup process parameters, including deformation rate and temperature. An experimental study on the effect of different deformation parameters on the tensile performance of composites was carried out based on a new manufacturing method of plated specimens with different levels of waviness by means of a four-point bending fixture. The experimental results showed that when the deformation temperature increases from 20℃ to 80℃, the tensile strength increases first and then decreases while the tensile module keeps increasing. While the deformation rate decreases from 0.40 to 0.04 mm−1/s, both tensile strength and module showed an increasing trend. The predicting model being validated by experimental results can be utilized to optimize the layup process parameter to satisfy the quality and efficiency requirements.

scholarly journals Managing Data Persistence in Network Enabled Servers

2005 ◽  
Vol 13 (4) ◽  
pp. 333-354 ◽  
Author(s):  
Eddy Caron ◽  
Bruno DelFabbro ◽  
Frédéric Desprez ◽  
Emmanuel Jeannot ◽  
Jean-Marc Nicod
Keyword(s):  
Data Management ◽  
Experimental Results ◽  
Model Data ◽  
Client Server ◽  
University Of Tennessee ◽  
Communication Time ◽  
Data Persistence ◽  
Remote Client ◽  
The University ◽  
Global Grid

The GridRPC model [17] is an emerging standard promoted by the Global Grid Forum (GGF) that defines how to perform remote client-server computations on a distributed architecture. In this model data are sent back to the client at the end of every computation. This implies unnecessary communications when computed data are needed by an other server in further computations. Since, communication time is sometimes the dominant cost of remote computations, this cost has to be lowered. Several tools instantiate the GridRPC model such as NetSolve developed at the University of Tennessee, Knoxville, USA, and DIET developed at LIP laboratory, ENS Lyon, France. They are usually called Network Enabled Servers (NES). In this paper, we present a discussion of the data management solutions chosen for these two NES (NetSolve and DIET) as well as experimental results.

scholarly journals Experimental Dynamic Analysis on a T100 Microturbine Connected With Different Volume Sizes

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
M. L. Ferrari ◽  
P. Silvestri ◽  
M. Pascenti ◽  
F. Reggio ◽  
A. F. Massardo
Keyword(s):  
Experimental Results ◽  
Test Rig ◽  
Large Size ◽  
Amplitude Increase ◽  
External Component ◽  
Compressor Map ◽  
Advanced Cycles ◽  
Valve Operation ◽  
The University ◽  
Volume Size

This paper shows experimental results obtained from a T100 microturbine connected with different volume sizes. The activity was carried out with the test rig developed at the University of Genoa for hybrid system emulation. However, these results apply to all the advanced cycles where a microturbine is connected with an additional external component responsible for volume size increase. Even if the tests were performed with a microturbine, similar analyses can be extended to large size turbines. A modular vessel was used to perform and to compare the tests with different volume sizes. To highlight the volume size effect, preliminary experimental results were carried out considering the transient response due to an on/off bleed valve operation. So, the main differences between system parameters obtained for a bleed line closing operation are compared considering three different volume sizes. The main results reported in this paper are related to surge operations. To produce surge conditions in this test rig, a valve operating in the main air path was closed to generate unstable behavior for the three different volume sizes. Particular focus was devoted to the operational curve plotted on the compressor map. The vibration frequency analysis showed significant amplitude increase not only during surge events but also close to the unstable condition. In details, possible surge precursor indicators were obtained to be used for the detection of risky machine operations. The experimental data collected during these tests are analyzed with the objective of designing control systems to prevent surge conditions.

Text Documents Plagiarism Detection using Rabin-Karp and Jaro-Winkler Distance Algorithms

2017 ◽  
Vol 5 (2) ◽  
pp. 462 ◽  
Author(s):  
Brinardi Leonardo ◽  
Seng Hansun
Keyword(s):  
Detection System ◽  
String Matching ◽  
Experimental Results ◽  
Plagiarism Detection ◽  
Text Documents ◽  
Matching Algorithm ◽  
Text Document ◽  
Different Types ◽  
The University

Plagiarism is an act that is considered by the university as a fraud by taking someone ideas or writings without mentioning the references and claimed as his own. Plagiarism detection system is generally implement string matching algorithm in a text document to search for common words between documents. There are some algorithms used for string matching, two of them are Rabin-Karp and Jaro-Winkler Distance algorithms. Rabin-Karp algorithm is one of compatible algorithms to solve the problem of multiple string patterns, while, Jaro-Winkler Distance algorithm has advantages in terms of time. A plagiarism detection application is developed and tested on different types of documents, i.e. doc, docx, pdf and txt. From the experimental results, we obtained that both of these algorithms can be used to perform plagiarism detection of those documents, but in terms of their effectiveness, Rabin-Karp algorithm is much more effective and faster in the process of detecting the document with the size more than 1000 KB.

Water Waves and Marine Structure Interaction

2004 ◽  
Author(s):  
Octavi Sado´ Garriga ◽  
Jeffrey M. Falzarano
Keyword(s):  
Free Surface ◽  
New Orleans ◽  
Water Waves ◽  
Frequency Estimation ◽  
Experimental Results ◽  
Oscillating Water Column ◽  
Towing Tank ◽  
Structure Interaction ◽  
Marine Structure ◽  
The University

The purpose of this paper is to combine and extend existing potential flow theory in order to analyze the linear free surface problem of an Oscillating Water Column (OWC) device and apply it to moonpool design. Analytical results were obtained implementing the previously derived theories, and later compared to experimental results conducted at the University of New Orleans Towing Tank. The model tests consisted of a study of a cylindrical OWC. The theoretical and experimental results of the free surface for the OWC tests agree for the resonant frequency estimation response but they disagree on the amplitude of the response.

scholarly journals Fixed Bed Regenerators for HVAC Applications

Proceedings ◽  
2019 ◽  
Vol 23 (1) ◽  
pp. 4 ◽  
Author(s):  
Hadi Ramin ◽  
Easwaran Krishnan ◽  
Carey J. Simonson
Keyword(s):  
Heat Transfer ◽  
Energy Recovery ◽  
Fixed Bed ◽  
Experimental Results ◽  
Experimental Uncertainty ◽  
Heat Transfer Area ◽  
Empirical Correlations ◽  
Different Types ◽  
Numerical Research ◽  
The University

Air-to-air energy recovery ventilators (ERVs) are able to reduce the required energy to condition ventilation air in buildings. Among different types of ERVs, fixed-bed regenerators (FBRs) have a higher ratio of heat transfer area to volume. However, there is limited research on FBRs for HVAC applications. This paper presents preliminary experimental and numerical research of FBRs at the University of Saskatchewan. The numerical and experimental results for effectiveness of FBR agree within experimental uncertainty bounds and the results agree with available empirical correlations in the literature.

Analysis of Failure Modes of a Thermoplastic One-Way Clutch

1991 ◽  
Vol 205 (3) ◽  
pp. 209-215 ◽  
Author(s):  
S C Burgess ◽  
T A Stolarski ◽  
S Karp
Keyword(s):  
Experimental Test ◽  
Failure Modes ◽  
Power Transmission ◽  
Experimental Results ◽  
Test Rig ◽  
New Type ◽  
Experimental Test Rig

This paper presents an analysis of the failure modes during power transmission of a new type of one-way clutch called an expansible-band clutch. The new clutch is made from thermoplastic materials and an experimental test rig has been used to test two material combinations to failure. The experimental results are compared with predictions obtained from empirical formulae. The differences in the two sets of results are used to make conclusions about the failure processes.

scholarly journals STUDENT ATTENDANCE SYSTEM USING WIFI DIRECT AND TEMPORARY WI-FI HOTSPOT

2020 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Doni Setio Pambudi ◽  
Taufiqotul Bariyah
Keyword(s):  
University Research ◽  
Experimental Results ◽  
Student Attendance ◽  
Administration Time ◽  
Verification Process ◽  
Almost All ◽  
The University ◽  
Additional Device

Manual attendance recording throws away a lot of teaching and administration time from the university. Research on automatic attendance recording that has been done can be divided into biometrics and non-biometrics uses. Almost all methods require additional device that it is costly and inflexible for class changes. The proposed method solves the problems by utilizing the standard features of smartphones that are owned by all student, this method uses Wi-Fi direct for class broadcasting process and temporary Wi-Fi hotspot for verification process. The experimental results show that the proposed method produces the time needed for the initialization process is 14980 ms and the verification process is 3640 ms.

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