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Online since: June 2010
Authors: Er Bing Wang, Hong Zhou, Ying Zhen Liang
In order to reduce the influence of pump noise on interior noise, it would be necessary to make an acoustic-vibration test first, and then analyze the test data to find out the main noise source, and finally suggest available measure to control the noise. ⅡⅡⅡⅡ Acoustic-Vibration Test There are two idle conditions on a hybrid electric vehicle: one is engine on, which is the same to conventional car, and the other is engine off with pump working alone, which is unique to HEV.
LMS SCADAS SC316W signal amplifier and intelligent acquisition system was for acquiring data and LMS Test Lab Signature Testing was for testing and recording. ⅢⅢⅢⅢ Signal processing Effective signal processing plays important role in identifying the transfer characteristic of pump noise.
From the statistic data it is easy to get the conclusion that the vibrational energy transferred from pump to car body is reduced to below 10%.
(2) According to the test data, we can get the transfer characteristic of this system.
This paper bases on specific issue and explores the transfer way of noise source through acoustic-vibration test and corresponding data analysis technologies.
Online since: November 2011
Authors: Ji Hyun Hwang, Justin M Ucol, Keun Woo Lee, Ada Ortega, Nam Soo Kim
TEM pictures (hundred thousandths magnification) of copper metal particles according to different concentrations of potassium sodium tartrate where the concentration is (a) 0mM (b) 0.5 mM (c) 1 mM (d) 2 mM (e) 5 mM (f) 10 mM As shown in the XRD results (Fig. 3) the data shows copper metal when the concentration of potassium sodium tartrate is 0.2M and the concentration of copper ions is 0.1M.
XRD data representations of copper Effect of the concentration of copper ions on controlling the shape of copper oxide Fig. 4.
The XRD data (Fig. 6.), shows a CuO peak when the concentration of copper ion is 0.1M.
Therefore, through the Eh-pH diagram and XRD data, the net shaped particles are identified as copper oxide.
XRD data representations of copper oxide However, when the concentration of copper ions is 1M, the region of copper ions in the diagram becomes the smallest compared to the other concentrations.
Online since: September 2013
Authors: Ren He, Jun Shi, Xiao Dan Gu
Define the braking torque T1 corresponding to the maximum deceleration in this condition (Te>T1), in which frictional braking need not work. (2) Based on study[8], if the rated electromagnetic braking torque is higher than a braking torque value (T2), the electromagnetic rotor will rise to more than 300℃ due to the excessive heat, leading to drastic changes in performance of the rotor’s magnetic permeability, and significantly reduction of the electromagnetic braking torque.
The test bed is composed of a DC motor, an inertia flywheel, a torque sensor, a pair of pinch wheels, the measured integrated brakes and a data acquisition device.
Data acquisition card is NI USB-6341-type data acquisition card, because the data acquisition is convenient and the program is relatively easy to build.
In the process of rotor speed gradually decreasing, the rotor speed and the brake torque are detected by the speed sensor and torque sensor, and then sent them to a data logger.
Online since: January 2021
Authors: Anna Mogucheva, Diana Yuzbekova, Yuliya Igorevna Borisova
Then the billets were additionally rolled at ambient temperature with a total reduction of 80% down to a final thickness of ~4 mm using a two-roller mill.
The data in Figure 4 summaries the tensile test obtained at different strain rates and temperatures.
It is clearly seen that serrated plastic flow (type A) in the alloy appears only at ambient temperature and intermediate strain rate (filled data points).
In the case of open data points ones mean that no serrations were observed.
The data on the PLC domain in Al-3Mg alloy subjected to ECAP was shown previously in [17].
Online since: May 2020
Authors: Marlon L. Mopon Jr., Georgette Anne T. Battad, Junel Lawrence C. Indiongco, Jericho G. Estacio
CheapStat, an inexpensive, open-source, hand-held potentiostat, was used to collect data in the experiment [6].
Detection of malathion was associated with the expected reduction in peak currents quantified as the inhibition ratio (ΔI/Io) given by Eq. 1 where Io is the peak current in the absence of malathion and Im is the peak current in the presence of malathion [4 5].
The data confirm the characteristic peaks of carbon-containing functional groups from the FTIR results.
The corresponding linear regression equation for the linear range is given by Eq. 2 with R2 equal to 0.9970 indicating linear fit of the calibration data.
The relatively high LOD is attributed to the higher noise of CheapStat data as compared to the usual data quality produced by potentiostats used on other studies [5].
Online since: July 2015
Authors: I. Ketut Gede Sugita, Ketut Astawa, I. Wayan Bandem Adnyana, I. Gusti Ngurah Priambadi, A.A.I.A. Sri Komaladewi
After the redesign Figure 1 Shape furnace Specification: 1 = cup holder in the furnace mouth 2 = injector combustion air from the blower 3 = shelter combustion air Red dots are the placement of the thermocouple probes to measure air temperature in the air storage space. 4 channel thermocouples which were used in this study were equipped with a data acquisition that has the capability of data collection at intervals of 70 milliseconds, the brand National Instrument NI USB-9211 / 9211A.
Spesifications Blower Spesification size Dimention Merk Elektrical Blower made in China The diameter of the output (do) The diameter of blade (ds) Motor rotation (n) Voltage (V) Power (P) Current flow (i) 2 5,5 3000/3600 220 30 1,5 inch inch rpm volt Watt Ampere Data collection was conducted three times in different time and day.
The data obtained in the form of temperature data, the capacity of the fuel (biomass) consumption and the resulting production.
Figure 5 The use of wood charcool Figure 6 Production Figure 5 shows that the redesign gives significant effect to the reduction of fuel consumption in the combustion process by 20%.
Online since: February 2016
Authors: Angelos P. Markopoulos, János Kundrák, Tamás Makkai
Machining cost reduction achieved through the increase of material removal rate and tool life without compromising surface integrity even for hard-to-machine materials is highly desirable; a paradigm being the cutting of hardened steels by CBN tools at increased speeds or as it is usually referred in the relevant literature high speed hard cutting.
The designation of the optimal technological data requires a mathematical model that is able to accurately specify these limit values.
Fig. 2 Experimental data for flank wear vs. cutting time for all cutting speeds Tool life equation, with T tool life, vc cutting speed and CT1, CT2, CT3 constants depending on other than cutting speed conditions, is [17]: (1) From the experimental data, the constants of equation (1) can be determined [18].
Kowalczyk, Cutting Data Influence on Cutting Forces and Surface Finish During Sintered Carbide Turning, Key Engineering Materials 581 (2013) 148-153
Kowalczyk, Estimating the effect of cutting data on surface roughness and cutting force during WC-Co turning with PCD tool using Taguchi design and ANOVA analysis, International Journal of Advanced Manufacturing Technology 77 (2015) 2241-2256
Online since: June 2015
Authors: Ramli Rosmamuhamadani, Mahesh Talari, Shamsuddin Sulaiman, Mohamed Arif Azmah Hanim, Mohd Idris Shah Ismail
This testing done to obtain the data based on the tensile test.
The data then automatically produced by the machine.
All data are recorded and calculated to obtain the average result.
The unit consists of a gimbaled arm to which the pin is attached, a fixture which accommodates disks up to 165 mm in diameter & 8 mm thick, an electronic force sensor for measuring the friction force, and a computer software for displaying the parameters, printing, or storing data for analysis.
The data also was supported by Mandal et. al,. [3].stated that the increasing in the yield strength and ultimate tensile strength can be attributed to the decrease in the grain size and hardening due to TiB2 particles.
Online since: April 2012
Authors: Hong Quan Sun, Jun Ding
Table 1 The ingredients and the mechanical parameters of three concrete test cubes Test beam Strength grade Cube size (mm3) The ingredient amount of per unit volume (kg/m3) fcu (MPa) fc (MPa) ft (MPa) Water- cement ratio Water Cement Fine aggregate Coarse aggregate LW-S C30 150×150×150 0.43 195 453 543 1209 25.7 17.19 2.07 LW-B C30 150×150×150 0.43 175 407 527 1291 29.19 19.52 2.22 LW-M C30 150×150×150 0.43 175 407 527 1291 31.26 20.91 2.31 Where fcu: Compressive strength of concrete test cube; fc: Axial compressive strength of concrete test cube; ft: Tensile strength of concrete test cube; Based on the formula of calculating elastic modulus in "Design Specification of Concrete Structures", we obtain the conclusion that the reduction of the compressive strength will directly lead to reduce the elastic modulus.
Using the data in Table 2, the elastic modulus of LW-B and LW-S are less than that of LW-M.
In the initial of loading, the data acquisition system records the experimental data simultaneously and shows that the beams have a good capacity of linear deformation.
Table 3 Cracking moment and ultimate moment Test beam Cracking Load (KN) Cracking moment (KN·M) Yield load (KN) Yield moment (KN·M) Ultimate load  (KN) Ultimate moment (KN·M) LW-S 60 15 350 87.5 460 115 LW-B 40 10 225 63.75 330 82.5 LW-M 45 11.25 240 60 ----- ----- Note: In the table, “-----” represents no data.
Using the data pairs (,)1, 2, and the least squares method, we obtained the fitting lines in the coordinate system ~ .
Online since: November 2005
Authors: Il Seon Sohn, Won Seok Jung, Dong Ho Bae, Won Wook Jung
It is shown road load response and the power spectrum density data of various practical road conditions in Fig. 2.
Therefore, it is difficult to attain economical and reasonable design as well as make reduction reliability on design.
Therefore, for reasonable design to attain design life of leaf spring assembly, it is necessary to determine the fatigue design criterion from the fatigue data obtained under the most severe actual condition [5].
And the data measured on road load response was used to obtain the fatigue load-life relation to develop the new fatigue design criterion of leaf spring.
And next, the damage analysis of road load response data was carried out.
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