scholarly journals Possibility Analysis of Using Acoustic Emission for Monitoring Technical Condition of Compressed Air Installation of 3AL25/30 Engine

2019 ◽  
Vol 49 (3) ◽  
pp. 1-15
Author(s):  
Krzysztof Dudzik ◽  
Adam Charchalis
Keyword(s):  
Acoustic Emission ◽  
System Analysis ◽  
Technical Condition ◽  
University Research ◽  
Compressed Air ◽  
Normal Operation ◽  
Test Results ◽  
Line System ◽  
Engine Room ◽  
On Line

Abstract This paper presents the methodology and research results of monitoring of compressed air starting system of 3AL25/30 engine placed in Maritime Engineering Faculty of Gdynia Maritime University. Research was carried out using a set of acoustic emission Vallen System. Analysis of recorded parameters revealed leakage in the installation – damage of one of the valves. The test results indicate that the AE method can be useful for monitoring the technical condition of pressure systems of engines and devices in a ship's engine room during normal operation as an on-line system.

A Novel Technique for On-Line Generation of Mg-Shielding Gas

2005 ◽  
Vol 488-489 ◽  
pp. 77-80
Author(s):  
Guo Qiang You ◽  
Si Yuan Long ◽  
Jili Zha
Keyword(s):  
Chemical Reaction ◽  
Compressed Air ◽  
Test Results ◽  
Shielding Gas ◽  
Effective Protection ◽  
Novel Technique ◽  
On Line ◽  
Running Cost ◽  
A New Technique ◽  
Line Generation

A new technique capable of on-line generating SO2+CO2+N2 shielding gas via thermal chemical reaction between compressed air and a mixture of C and S powder was introduced in the present study. The test results in both laboratory and foundry indicate that the on-line generated gas is able to provide effective protection to Mg melting bath up to 730 oC as SF6+N2 shielding gas does, while its running cost is 30% less than of the latter.

scholarly journals THE MODELING OF CONSTRUCTIONS OF SHIPS LOADER’S ENGINE ROOM FOR THE IDENTIFYING THE CAUSE OF INCREASED VIBRATION

2021 ◽  
Vol 30 (1) ◽  
pp. 88-99
Author(s):  
V. Popov ◽  
◽  
A. Popova ◽  
Keyword(s):  
Spur Gear ◽  
Technical Condition ◽  
Normal Operation ◽  
Vibration Velocity ◽  
Vibration Source ◽  
Natural Oscillations ◽  
Term Operation ◽  
Engine Room ◽  
Support Frame ◽  
Vibration Parameters

The article contains a finite element modeling of the stress-strain state of metal constructions of the foreign manufactured ships loader’s engine room, located in the seaport of Yuzhny’s town under the jibs lifting and lowering drive vibration source. The model have been developed taking into account the technical condition of the structure, which were determined after visual and instrumental examination. Have been researched the rotating structures of jibs lifting and lowering drive, means of ensuring smooth start and soft stop of the drive, have been increased the specific drive imperfections. Have been done the cinematic and dynamic calculations on a subject of definition of vibration parameters of rotation components of drive (electric motor, spur gear, gear, brace and rope drums). Have been offered the effective methods of experimental research, which including the scheme of installations of sensors at the structure of support frame of engine room, experimental measurements of vibration characteristics (vibration, amplitude, vibration velocity, vibration acceleration) and its mathematical processing. Have been done the comparison of the theoretical forced vibrations frequency of structural units of ships loader with experimentally determined data and localization of the most dangerous source of vibration. Have been revealed the main reason of excess vibration the structure of ships loader which are reduced rigidity of drive support frame which has been damaged from corrosion and consequently, resonance of rotational drive components with natural oscillations of ships loader structures. Have been developed the method of strengthening of structures of engine room, which have been damaged from corrosion during long term operation for the reduction of vibration intensity and for the further normal operation.

The Test Research and Data Comparison of BI by Automation Implementation

2014 ◽  
Vol 1022 ◽  
pp. 380-386
Author(s):  
Xiao Yun Xie ◽  
Jun Hui Wu ◽  
Quan Zhou ◽  
Jie Chen ◽  
Hui Ping Si ◽  
...  
Keyword(s):  
Business Intelligence ◽  
Comparative Data ◽  
Data Migration ◽  
Quality Data ◽  
Normal Operation ◽  
Stable Operation ◽  
Migration Process ◽  
Line System ◽  
Data Comparison ◽  
On Line

It is important to explore the data type of test content and the comparative data by the realization of automation in data migration process based on the basic idea of ETL technology. It is in order to work efficiently than complete data, improve work efficiency and the coverage of test data which free the human from a single repetitive labor in the business intelligence project. Quality data is an important prerequisite for the success of on-line system, and also a powerful guarantee stable operation of the system in the future. The design of the comparative data in automated implementation is provide an important guarantee for the normal operation of the system.

scholarly journals System characterization of dynamic biological systems through improved data analysis.

2021 ◽  
Author(s):  
Gerben R Stouten ◽  
Sieze Douwenga ◽  
Carmen Hogendoorn ◽  
Robbert Kleerebezem
Keyword(s):  
Data Analysis ◽  
Process Model ◽  
System Analysis ◽  
Close Monitoring ◽  
Line System ◽  
Wide Range ◽  
System Characterization ◽  
On Line ◽  
Batch Bioreactors

Determining the functional development and dominant competitive strategy in microbial community enrichments is complicated by the extensive measurement campaigns required for off-line system analysis. This study demonstrates that detailed system characterization of aerobic pulse fed enrichments can be established using on-line measurements combined with automated data analysis. By incorporating the physicochemical processes in on-line data processing with a Particle Filter and kinetic process model, an accurate reconstruction of the dominant biological rates can be made. We hereby can differentiate between storage compound production and biomass growth in sequencing batch bioreactors. The method proposed allows for close monitoring of changes in functional behavior of long-running enrichment cultures, without the need for off-line samples, therewith enabling the identification of new insights in process dynamics with a minimal experimental effort. Even though a specific example application of the method proposed is described here, the approach can readily be extended to a wide range of dynamic experimental systems that can be characterized based on on-line measurements.

Research on On-Line Anti-Icing Technology for Carenary along Electrified Railway

2013 ◽  
Vol 676 ◽  
pp. 321-324
Author(s):  
Lei Guo ◽  
Qun Zhan Li
Keyword(s):  
Simulation Model ◽  
Heat Balance ◽  
Normal Operation ◽  
Balance Equations ◽  
Model Based ◽  
Static Var Generator ◽  
On Line ◽  
Electrified Railway ◽  
The Heat Balance

Accidents of icing on catenary have great impacts on normal operation of trains. An on-line anti-icing technology used static var generator (SVG) for catenary was proposed, which can prevent icing formation without interrupting trains normal operation. The heat balance equations for catenary were solved, whose results were compared with data provided by TB/T 3111 and testing show the equation was correct. The simulation model based on Matlab was bulit , whose results and analysis show the correctness of the method.

scholarly journals Analysis of vibrodiagnostics methods in the technical state study of designed multimedia mobile scenes

2019 ◽  
Vol 302 ◽  
pp. 01011
Author(s):  
Marcin Łukasiewicz ◽  
Michał Liss ◽  
Natalia Dluhunovych
Keyword(s):  
Modal Analysis ◽  
Diagnostic Tests ◽  
Research Process ◽  
Technical Condition ◽  
Technical State ◽  
Normal Operation ◽  
Design Stage ◽  
Analysis Methods ◽  
State Study ◽  
Diagnostic Research

The paper presents the possibilities of using vibroacoustic methods in the study of the technical condition of designed multimedia mobile scenes. In particular, the possibility of implementing modal analysis methods in modelling and diagnostic research process has been presented. The use of virtual methods enables diagnostic tests both at the design stage and at the stage of normal operation, whereas modal methods help to explain the nature of the work of the element under investigation.

Research on Wireless Vibration Monitoring System for Devices in the Engine Room

2012 ◽  
Vol 503-504 ◽  
pp. 1651-1654
Author(s):  
Guo Yong Zhang ◽  
Shuo Wu
Keyword(s):  
Monitoring System ◽  
Vibration Sensor ◽  
Vibration Monitoring ◽  
Vibration State ◽  
Engine Room ◽  
On Line ◽  
The Common

The vibration can influence the running of devices in the engine room. It is necessary to monitor the vibration state of all running machineries. Through integrating the Bluetooth technology into the common vibration sensor, a wireless on-line vibration monitoring system is designed to monitor all devices. It will be helpful to avoid severe failure and improve the cruising ability.

On-line wear monitoring using acoustic emission

Wear ◽  
1993 ◽  
Vol 162-164 ◽  
pp. 605-610 ◽  
Author(s):  
Kaoru Matsuoka ◽  
David Forrest ◽  
Tse Ming-Kai
Keyword(s):  
Acoustic Emission ◽  
Line Wear ◽  
On Line ◽  
Wear Monitoring
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