scholarly journals Effect of piezoelectric material on vibration of vessel of marine transportation

2021 ◽  
Vol 4 (2) ◽  
pp. 34-39
Author(s):  
Salsabil karim Mohammed
Keyword(s):  
Piezoelectric Material ◽  
Power Transmission ◽  
The Body ◽  
Marine Transportation ◽  
Mechanical Wear ◽  
Wake Field ◽  
Marine Vessels

The drive arrangement of normal marine vessels involves a propeller coupled to a progression of shafts and diary orientation which is at last associated with a push bearing which sends the propeller pivotal power into the frame of the boat through a push block coupled to the mass head. For effortlessness, the framework is improved to a propeller, a solitary shaft, diary bearing and a push bearing. As the vessel travels through the sea, a wake is produced. This non-uniform wake field is the inflow to the propeller. The power produced by the propeller is additionally non-uniform.  The impetus arrangement of a marine vessel is the principle supporter of commotion emanated from the vessel. It is along these lines important to diminish the commotion sent from the propeller into the sea and consequently the vibration that is created by the propeller that is thus communicated into the body. The inspiration for lessening commotion and vibration remembers diminishing mechanical wear for segments, expanding secrecy limit of military vessels, improving traveler and group solace, and decreasing the effect on marine conditions. The point of this theory is to dissect the shaky power created by the propeller, the power transmission ways, and techniques to quantify the power transmission through the push bearing continuously.

Biocompatible Cardiac Sensor with Continuous Arrhythmia Monitoring for Human Wellness

2016 ◽  
Vol 835 ◽  
pp. 71-77
Author(s):  
Jong Ha Lee
Keyword(s):  
Atrial Fibrillation ◽  
Power Transmission ◽  
Sampling Rate ◽  
Animal Experiments ◽  
Small Animal ◽  
The Body ◽  
Major Surgery ◽  
Data Sampling ◽  
Integrated Sensor ◽  
Sensor Module

Prolonged monitoring is more likely to result in an accurate diagnosis of atrial fibrillation patients than intermittent or short-term monitoring. In this study, we present an implantable ECG sensor to monitor atrial fibrillation patients in real time. The developed implantable sensor is composed of a micro controller unit, analog to digital converter, signal transmitter, antenna, and two electrodes. The sensor detects ECG signals from the two electrodes and transmits these signals to the external receiver that is carried by the patient. The sensor continuously transmits signals, so its battery consumption rate is extremely high. To overcome this problem, we consider using a wireless power transmission module in the sensor module. This module helps the sensor charge power wirelessly without holding the battery in the body. The size of the integrated sensor is approximately 0.12 inch x 1.18 inch x 0.19 inch. This sensor size is appropriate enough for cardiologists to insert the sensor into patients without the need for a major surgery. The data sampling rate was 300 samples/sec, and the frequency was 430 Hz for signal and power transmission. To verify the validation of the developed sensor, the small animal experiments were conducted.

scholarly journals Wireless Power Transmission for Medical and Other Applications

2019 ◽  
Vol 8 (12S) ◽  
pp. 479-482
Keyword(s):  
Power Transmission ◽  
Cardiac Pacemaker ◽  
The Body ◽  
Small Range ◽  
Power Transfer ◽  
Wireless Power ◽  
Data Logging ◽  
Cardiac Stimulation ◽  
Battery Power ◽  
Operation Procedure

wireless power transfer was discovered by Nikolas tesla. This project is developed for power transfer for small range application.The objective of this work is to make the batteriescharge which are impossible to be connected electrically such as devices which are implanted in the body such as cochlear implants defibrillators etc..More than 6 lakhs pacemakers are embedded each year worldwide .A cardiac stimulation makes use of half of the battery power of a cardiac pacemaker and the other half of its power for monitoring and data logging. A periodic operation procedure is required for battery replacement. This work is to design awirelesslyrechargeable battery for the above problem.

scholarly journals Cracks Interaction in a Pre-Stressed and Pre-Polarized Piezoelectric Material

2020 ◽  
Vol 36 (2) ◽  
pp. 177-182
Author(s):  
E.M. Craciun ◽  
A. Rabaea ◽  
S. Das
Keyword(s):  
Boundary Conditions ◽  
Piezoelectric Material ◽  
Complex Potential ◽  
Mathematical Problem ◽  
The Body ◽  
Stress Fields ◽  
Linear Complex ◽  
The Third ◽  
Complex Differential Equations ◽  
Cracks Interaction

ABSTRACTWe formulate and solve the mathematical problem for antiplane cracks in a pre-stressed and pre-polarized piezoelectric material with static initial fields, assuming the initially deformed configuration of the body is locally stable. Using the boundary conditions of antiplane cracks, we get the Riemann-Hilbert problems. Nonhomogeneous linear complex differential equations having the unknown complex potential are obtained. For constant value of the applied incremental forces can be obtained the complex potentials, incremental displacement and stress fields corresponding to the third mode of the classical fracture. The problem of interaction of two collinear, unequal cracks in a pre-stressed and pre-polarized piezoelectric material, is also studied.

scholarly journals Conceptual Analysis of Test Car Body with the Use of CAD Systems

2019 ◽  
Vol 23 (4) ◽  
pp. 53-60
Author(s):  
Bartosz Moczulak ◽  
Wojciech Miąskowski ◽  
Krzysztof Nalepa
Keyword(s):  
Pressure Distribution ◽  
Computer Simulations ◽  
Conceptual Analysis ◽  
Power Transmission ◽  
The Body ◽  
Cad Systems ◽  
Car Body ◽  
Hybrid Power ◽  
Simplified Analysis ◽  
The University

AbstractThe article presents structural specifications and conceptual analysis of the test car body equipped with a hybrid power transmission system. The test car is constructed by students of the Faculty of Technical Sciences of the University of Warmia and Mazury in Olsztyn. Works dedicated to designing and construction of a car body aim at the increase of safety and improvement of aesthetics of the constructed vehicle with simultaneous maintenance of its operational and test functionality. The article presents a simplified analysis of the distribution of pressure around the body for several suggested concepts and selected technologies of production of the test car body. The paper presents results of computer simulations, of the pressure distribution and the remaining aspects of assessment of the car body functionality.

Detection and localization of isolated wear bearing faults of rotating machinery by spectral analysis

2013 ◽  
Vol 10 (6) ◽  
pp. 565-572
Author(s):  
N. Menasri ◽  
M. Zaoui ◽  
A. Bouchoucha
Keyword(s):  
Spectral Analysis ◽  
Vibration Analysis ◽  
Acoustic Analysis ◽  
Power Transmission ◽  
Vibration Signal ◽  
The Body ◽  
Systematic Analysis ◽  
Lubricant Analysis ◽  
Strategic Role ◽  
Envelope Spectrum

Rotating machines play a strategic role in a manufacturing process, and it is the case of a cement mill. These machines are composed of fragile bodies (bearings and gears, etc.) subjected to mechanical stress and harsh industrial environment.Sources of failure are many; the wear and the spalling of bearing, the wear and fracture of a tooth of a gear, the misalignment of the axes, etc. To avoid unexpected downtime and costly, those bodies must be monitored continuously. There are several ways to do that; vibration analysis, lubricant analysis, infrared thermography and acoustic analysis. Vibration analysis (frequency) is most often used by operating a signal from an accelerometer. Whenever a fault participated in a contact, it changed the vibration characteristics of the system. By analyzing the acceleration measurements from an accelerometer, we can identify and quantify these changes in order to establish a relationship between the measures and the type of defect, which will be used as signatures for fault diagnosis system. In a system of power transmission (gear unit of a cement mill) the frequency of occurrences of faults can be known from the geometry and kinematics of the system.This article deals with the detection of bearing defects isolated in a gear unit of a cement mill by spectral analysis of vibration; which based on a systematic analysis spectral and envelope spectrum of vibration signal for the presence of images of all vibrational defects may affect the body in question.

Design and Construction of a Solar-Electric Vehicle

1994 ◽  
Vol 116 (1) ◽  
pp. 28-34 ◽  
Author(s):  
S. H. Bhavnani
Keyword(s):  
Alternative Energy ◽  
Fossil Fuels ◽  
Power Transmission ◽  
Weight Ratio ◽  
Photovoltaic Cell ◽  
The Body ◽  
Electrical System ◽  
Element Analysis ◽  
Cross Sectional ◽  
Front Suspension

Recent concerns relating to global warming caused by greenhouse gases, coupled with a growing awareness of the limited available resources of fossil fuels, have spurred an interest in alternative energy powered vehicles. This paper describes the analysis, development, and testing of an aerodynamic vehicle powered by photovoltaic cells. The primary components of the vehicle are the composite material body, the aluminum space frame, the wheel hubs and front suspension assembly, the drive train, and the electrical system. The frame was designed using finite element analysis with the components of the frame modeled as beam elements. The body, designed to have a very high strength-to-weight ratio, was of graphite/Kevlar/Nomex sandwich construction. Testing was carried out using the three-point bend test to determine the optimal sandwich cross-sectional configuration. The design of the front suspension, the wheel hubs, and the power transmission are also discussed. The electrical system, based on a monocrystalline photovoltaic cell assembly, and silver-zinc storage cells, is also described. Finally, results of the optimization routine developed are also described.

Dynamic Analysis of Power Transmission Tower Collapse with Wind Load

2013 ◽  
Vol 838-841 ◽  
pp. 494-497
Author(s):  
Liang Wang ◽  
Wei Lian Qu ◽  
Yan Fei Li ◽  
Yi Fei Wang
Keyword(s):  
Failure Modes ◽  
Power Transmission ◽  
Time History ◽  
Weather Conditions ◽  
Wind Load ◽  
The Body ◽  
Force Model ◽  
Transmission Tower ◽  
Restoring Force ◽  
Adverse Weather

Transmission tower collapses in adverse weather conditions now and than,which always accompanied thunderstorm.The simulation of transmission collapse under downburst wind load is studied. The tower is modeled as an assembly of beamcolumn elements,fournode isoparametric curved element,and prestressed pole unit simulation insulator,using bilinear restoring force model to formulate the material nonlinear.Simulated downburst wind load time history samples,apply it as external load to the established transmission tower model.Analysis of transmission tower know that transmission towers destroyed in the lower part of the body of the Tower, compressive failure modes in the beam , causing transmission tower's final collapse.

scholarly journals Development of a Capsule Robot for Exploring the Colon

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 456
Author(s):  
Jinyang Gao ◽  
Zenglei Zhang ◽  
Guozheng Yan
Keyword(s):  
Body Length ◽  
Power Transmission ◽  
Ex Vivo ◽  
Small Body ◽  
Power Source ◽  
The Body ◽  
Design Rule ◽  
Worst Case ◽  
Movement Performance ◽  
Capsule Robot

A tether-less inchworm-like capsule robot (ILCR) is promising to enable a non-invasive exploration of the colon, while existing ILCRs show barely satisfactory movement performance because the colon environment is nonstructural. In this current study, we develop an enhanced ILCR based on a design rule of maximizing the achievable periodic stroke and minimizing the body length, with the aim of improving movement performance. By designing an axial compact expanding mechanism (EM), employing a novel linear mechanism (LM), and integrating a hollow-cylinder-like power source based on wireless power transmission (WPT), the enhanced ILCR achieves a periodic stroke of 38 mm within a small body length of 33 mm. Our experiments show that the EM and LM can work reliably in an ex-vivo colon with a lot of intestinal mucus, and the power source can safely supply a stable working voltage of 3.3 V even in the worst case. Being wirelessly controlled and powered, the enhanced ILCR shows satisfactory movement performance, with velocities of 15.8 cm/min, 12.1 cm/min, and 7.4 cm/min in a transparent tube, a tiled colon, and a suspended colon, respectively, promising to accomplish an exploration for the 1.5-m long colon within 30 min.

scholarly journals Problems of creating a promising biaxial bogie of a shunting diesel locomotive

2020 ◽  
Vol 79 (3) ◽  
pp. 161-170
Author(s):  
A. S. Kosmodamianskiy ◽  
V. I. Vorob’ev ◽  
M. Yu. Kapustin ◽  
O. V. Izmerov ◽  
D. N. Shevchenko
Keyword(s):  
Power Transmission ◽  
Gear Wheel ◽  
The Body ◽  
Diesel Locomotive ◽  
Bogie Frame ◽  
Traction Drive ◽  
Industrial Enterprises ◽  
Traction Motors ◽  
Empirical Regularities ◽  
The Cost

Recently, in domestic and foreign practice, shunting and industrial diesel locomotives with hydraulic transmission are replaced by diesel locomotives with electric transmission and the number of axles from 2 to 4, which allows reducing the cost of fuel and repair. Accordingly, the problem arises of creating a biaxial bogie of a shunting diesel locomotive with power transmission, as much as possible unified with a triaxial non-pedestal bogie with a wheel diameter of 1050 mm. The analysis of a possible version of a biaxial shunting diesel locomotive revealed the insufficiency of the existing scientific backlog for a rational choice of design solutions. The need has been established to conduct research on irregularities of access tracks of industrial enterprises to determine the effect of dynamic unloading of diesel locomotive axles on coupling properties and to study its horizontal dynamics by modeling methods with experimental verification of the result on diesel locomotives already produced in order to determine typical options for cross-link nodes between the bogie and the body. For a traction drive with a rigid gear wheel, when assessing the load of nodes under the action of a dynamic moment in the drive, it is impossible to accept the assumption of the shockless nature of the processes in the traction drive and neglect the wheel slippage along the rail, which makes it impossible to correctly model dynamic processes in the drive, and to use previously known empirical regularities for the design of suspension devices for traction electric motors fail according to the layout of the nodes. In order to reduce possible errors in the design of a new individual traction drive for shunting diesel locomotives in conditions of insufficient scientific reserve, it is proposed to choose the option with an elastic gear wheel and suspension with articulated movable links already tested on mainline diesel locomotives that do not have special shock-absorbing elements. Variants of such a suspension are proposed, in which the traction motors are moved relative to the bogie frame with a short length between the axes of the upper and lower hinges, as well as the possibility of its unification with pendulum and spring traverse suspensions. A patent for an invention and two patents for a utility model were obtained for the proposed solutions.

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