scholarly journals Measurement and Diagnostic System for Marine Engines

2019 ◽  
Vol 49 (3) ◽  
pp. 33-48 ◽  
Author(s):  
Adam Charchalis
Keyword(s):  
Research And Development ◽  
Measuring Equipment ◽  
Diagnostic System ◽  
Technical Condition ◽  
Development Work ◽  
Maintenance And Repair ◽  
Maintenance System ◽  
Marine Engines ◽  
Marine Engineering ◽  
Ship Operation

Abstract The Scheduled Maintenance System allows ship-owners and operators to plan, carry out and document the maintenance and repair of equipment and mechanisms on board the ship at intervals in accordance with the class requirements imposed by the Classification Societies and the manufacturer of the equipment. In order to develop the research capabilities of the Faculty of Marine Engineering of Gdynia Maritime University, a Measurement and Diagnostic System has been developed to assess the technical condition of machinery and equipment in operation on board the ship. Modernization of measuring equipment, significantly expanded the research capabilities, which resulted in increasing the scope, improving quality, and speeding up the research and development work in the field of safety of operation and diagnostics of engine rooms and ship operation.

scholarly journals Instantaneous Rotational Speed Algorithm for Locating Malfunctions in Marine Diesel Engines

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1396 ◽  
Author(s):  
Damian Kazienko ◽  
Leszek Chybowski
Keyword(s):  
Diesel Engines ◽  
Rotational Speed ◽  
Combustion Process ◽  
Diagnostic System ◽  
Diagnostic Algorithm ◽  
Technical Condition ◽  
Practical Implementation ◽  
Correct Operation ◽  
Marine Engines ◽  
Marine Diesel

This article suggested broadening the standard methods for diagnosing the technical condition of diesel engines to include an analysis of the instantaneous rotational speed of compression combustion engines with the use of a novel algorithm. The authors revised the subject concerning the use of the analysis of instantaneous changes in the rotational speed of an engine when assessing its technical condition and the location of the malfunction. An algorithm and its practical implementation in a prototype diagnostic system called SpeedMA were presented. This article reported the test results of the prototype in the context of indicating the engine cylinder in which ignition failed to occur. Tests were carried out for two marine engines: a low-speed trunk engine directly driving the fixed-pitch propeller and a medium-speed trunk engine driving the alternator. For each case, an analysis was carried out for different engine loads and at individual cylinders in which combustion failed to occur. The experimental results showed an unambiguous relation between the combustion process of the examined engines and changes in the instantaneous rotational speed. The results also confirmed the usefulness of the proposed method and showed the correct operation of the presented diagnostic algorithm. The proposed diagnostic system could be used during the operation of engines running in real ship engine rooms.

Strategies of maintenance and repair of agricultural machinery

2020 ◽  
pp. 38-48
Author(s):  
Aleksey S. Dorokhov ◽  
Aleksandr V. Denisov ◽  
Aleksey A. Solomashkin ◽  
Valeriy S. Gerasimov
Keyword(s):  
Wear Rate ◽  
Technical Condition ◽  
Research Purpose ◽  
Agricultural Machinery ◽  
Maintenance And Repair ◽  
Wear Rates ◽  
Urgent Task ◽  
Machine Parts ◽  
Current Value ◽  
Agricultural Machines

Modern machines are subject to progressive wear that occurs at different rates, which leads to unpredictable failures that reduce the reliability and durability of machines. The strategy of maintenance and repair is aimed at eliminating these problems. (Research purpose) The research purpose is in analyzing the basic principles of the strategy of maintenance and repair of agricultural machinery in order to ensure control of the technical condition of machine parts. (Materials and methods) When resource diagnostics is used, , the allowable value of the parameter is set in advance for a part . This value is the tolerance that corresponds to a certain wear rate of the part. The tolerance is set based on the condition that if the current value of the controlled resource parameter during the next diagnosis is less than the set value, then such a part at the current value of the wear rate can be finalized until the next inter-control check. Taking into account the wear rate of the same type of parts from the group when determining the allowable wear during their resource diagnostics becomes an urgent task. (Results and discussions) As a result of research, the article presents "Methodology for determining the main indicators of reliability of parts of agricultural machines with different wear rates" and "Methodology for determining the tolerance system of parts of agricultural machines with different wear rates". (Conclusions) The article presents the tolerance system that reduces the probability of failure of machine parts in operation. During resource diagnostics, those parts whose resource parameters exceed the tolerance are rejected.

Information inputs to research and development work

1989 ◽  
Vol 15 (3) ◽  
pp. 135-148 ◽  
Author(s):  
T. Whitehall ◽  
C.M. Breadmore ◽  
A.J. Butters
Keyword(s):  
Research And Development ◽  
Development Work

scholarly journals Research and Development Work on Solar Assisted Drying Systems

2015 ◽  
Vol 11 (7) ◽  
pp. 701-714
Author(s):  
Mohd Syahriman Mohd Azmi ◽  
Mohd. Yusof Hj. Othman ◽  
Mohd Hafidz Hj. Ruslan ◽  
Kamaruzzaman Sopian ◽  
Zafri Azran Abdul Majid ◽  
...  
Keyword(s):  
Research And Development ◽  
Development Work

scholarly journals Step-by-step control of target efficiency indices of the control and measuring equipment stock applied in construction and housing and communal services

2018 ◽  
Vol 170 ◽  
pp. 01010 ◽  
Author(s):  
Rustam Khayrullin ◽  
Pavel Ivanov
Keyword(s):  
Mathematical Model ◽  
Finite Difference ◽  
Measuring Equipment ◽  
Technical Condition ◽  
Measuring Instruments ◽  
Finite Difference Equations ◽  
Target Values ◽  
The Mathematical Model ◽  
Step Control ◽  
Different Levels

The mathematical model is considered for the formation and implementation of development strategies of the stock of control and measuring instruments (CMI) applied in construction and housing and communal services(HCS), and step-by-step control of efficiency target values of the stock. The model is based on a system of finite - difference equations describing the change of number of the CMI samples with different levels of technical perfection and technical condition at each planning interval. The model allows calculating the required number of CMI for procurement and repairs in the various groups for provide target values of efficiency indices at each planning interval. Controller is number of modern CMI samples for procurement and number of modern and obsolete faulty CMI samples for the repairs. The results of calculations are presented.

Offshore subsea engineering

1978 ◽  
Vol 290 (1366) ◽  
pp. 99-111 ◽  
Keyword(s):  
Research And Development ◽  
Development Work ◽  
Current Development ◽  
Well Completion ◽  
And Control

As a result of years of research and development work on subsea completions, manifolds and flowlines, followed by field installations in relatively shallow and calm waters, a number of well completion and flowline laying and connecting methods are available and operational. The installation methods are basically diverless and control and maintenance are achieved by sophisticated systems; likewise the floating offshore terminals such as the E.L.S.B.M. and the Spar have been designed, built and put into operation. Although these systems were meant to be installed mainly in deeper waters, say beyond 210 m where diver access and the use of conventional techniques would become rather limited for technical and economic reasons, it is now evident that many fields in shallower waters can be more economically and efficiently developed or complemented by the use of deepwater techniques. Current development work concentrates on the design and evaluation of multibore production risers, floating production platforms and pipelaying and repair.

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