APPLICATION OF FUZZY ANALYTIC HIERARCHY PROSES FOR ERROR DETECTION OF AUXILARY SYSTEMS OF SHIP MAIN DIESEL ENGINES

2021 ◽  
Vol 157 (A2) ◽  
Author(s):  
H Demirel ◽  
K Ünlügençoğlu ◽  
F Alarçin ◽  
A Balin
Keyword(s):  
Diesel Engine ◽  
Error Detection ◽  
Cooling System ◽  
Detection System ◽  
Analytic Hierarchy ◽  
Engine Room ◽  
Air Supply ◽  
Solution Methods ◽  
Marine Engineering ◽  
Main Engine

Ship engine room has a structure which has to meet a number of needs with regard to administrative conditions. Therefore, when the complicated structure of engine room are considered, even a simple mechanical failure, if no measures taken abruptly, grows into irreversible condition, causing losses that cannot be compensated. A well-qualified ship engine conductor along with an effective error detection system is needed to detect failure and act immediately against any engine impairments possible. This study aims to manage troubleshooting in main engine auxiliary systems which cover cooling, lubricating and cooling oil and fuel systems. The study is also thought to be a good reference for maintenance processes for marine engineering operators. Breakdown of main engine equipment are examined and troubles hooting program is developed for using Fuzzy Analytic Hierarchy Process (F-AHP) determine solution methods and causes of such breakdowns. In this paper, a fuzzy Multi Criteria Decision Making (MCDM) methodology was proposed to determine the most effected system of the ship main diesel engine. The results showed that fuel system was the most effected alternative, as being followed subsequently by cooling system, governor system, air supply system and oiling system. The results were based upon the opinions of three experts groups who ranked the ship main diesel engine systems alternatives according to twenty-nine criteria expert selected.

Application of Fuzzy Analytic Hierarchy Proses for Error Detection of Auxilary Systems of Ship Main Diesel Engines

2015 ◽  
Vol 157 (A2) ◽  
pp. 105-112
Keyword(s):  
Diesel Engine ◽  
Error Detection ◽  
Cooling System ◽  
Detection System ◽  
Analytic Hierarchy ◽  
Engine Room ◽  
Air Supply ◽  
Solution Methods ◽  
Marine Engineering ◽  
Main Engine

Ship engine room has a structure which has to meet a number of needs with regard to administrative conditions. Therefore, when the complicated structure of engine room are considered, even a simple mechanical failure, if no measures taken abruptly, grows into irreversible condition, causing losses that cannot be compensated. A well-qualified ship engine conductor along with an effective error detection system is needed to detect failure and act immediately against any engine impairments possible. This study aims to manage troubleshooting in main engine auxiliary systems which cover cooling, lubricating and cooling oil and fuel systems. The study is also thought to be a good reference for maintenance processes for marine engineering operators. Breakdown of main engine equipment are examined and troubles hooting program is developed for using Fuzzy Analytic Hierarchy Process (F-AHP) determine solution methods and causes of such breakdowns. In this paper, a fuzzy Multi Criteria Decision Making (MCDM) methodology was proposed to determine the most effected system of the ship main diesel engine. The results showed that fuel system was the most effected alternative, as being followed subsequently by cooling system, governor system, air supply system and oiling system. The results were based upon the opinions of three experts groups who ranked the ship main diesel engine systems alternatives according to twenty-nine criteria expert selected.

A Fuzzy DEMATAL Model Proposal for the Cause and Effect of the Fault Occuring in the Auxiliary Systems of the Ships' Main Engine

2018 ◽  
Vol Vol 160 (A2) ◽  
Author(s):  
A Balin ◽  
H Demirel ◽  
E Celik ◽  
F Alarcin
Keyword(s):  
Decision Making ◽  
Error Detection ◽  
Detection System ◽  
Causal Effect ◽  
Complex Structure ◽  
Fuel Oil ◽  
Fuzzy Dematel ◽  
Engine Room ◽  
Engine Failure ◽  
Main Engine

The ship engine room has a structure that meets a number of needs related to administrative conditions. Even if a simple mechanical error is considered to be the addition of human errors into the complex structure of the engine room, it can lead to undetected loss. How the causes and effects of the detected faults affect the system is as important as an effective fault detection system to detect the fault and take immediate action against any possible engine failure. This study reveals the causes of problems occurring in the main engine auxiliary systems including cooling, lubricating, cooling oil and fuel systems, and the extent of these problems affecting the system. While the Decision Making Trial and Evaluation Laboratory supports to identify and analyze the error detection of auxiliary systems with respect to causal effect relation diagram, fuzzy sets deal with the uncertainty in decision-making and human judgements through the DEMATEL. Therefore, fuzzy DEMATEL approach is applied to examine the causes and the weights of the faults and their relation to each other in the auxiliary systems. When we look at the result of the proposed approach, fuel oil pump failures has more impact on the all system and air cooler problems has the second highest place among the all errors.

A FUZZY DEMATEL MODEL PROPOSAL FOR THE CAUSE AND EFFECT OF THE FAULT OCCURRING IN THE AUXILIARY SYSTEMS OF THE SHIPS’ MAIN ENGINE

2021 ◽  
Vol 160 (A2) ◽  
Author(s):  
A Balin ◽  
H Demirel ◽  
E Celik ◽  
F Alarcin
Keyword(s):  
Decision Making ◽  
Error Detection ◽  
Detection System ◽  
Causal Effect ◽  
Complex Structure ◽  
Fuel Oil ◽  
Fuzzy Dematel ◽  
Engine Room ◽  
Engine Failure ◽  
Main Engine

The ship engine room has a structure that meets a number of needs related to administrative conditions. Even if a simple mechanical error is considered to be the addition of human errors into the complex structure of the engine room, it can lead to undetected loss. How the causes and effects of the detected faults affect the system is as important as an effective fault detection system to detect the fault and take immediate action against any possible engine failure. This study reveals the causes of problems occurring in the main engine auxiliary systems including cooling, lubricating, cooling oil and fuel systems, and the extent of these problems affecting the system. While the Decision Making Trial and Evaluation Laboratory supports to identify and analyze the error detection of auxiliary systems with respect to causal effect relation diagram, fuzzy sets deal with the uncertainty in decision-making and human judgements through the DEMATEL. Therefore, fuzzy DEMATEL approach is applied to examine the causes and the weights of the faults and their relation to each other in the auxiliary systems. When we look at the result of the proposed approach, fuel oil pump failures has more impact on the all system and air cooler problems has the second highest place among the all errors.

scholarly journals Perawatan dan Perbaikan Sistem Pendingin Mesin Induk Pada Kapal Perikanan

2021 ◽  
Vol 26 (1) ◽  
pp. 1
Author(s):  
Boby Wisely Ziliwu ◽  
Agustinus Jhonri Situmorang ◽  
Richard Antonius Rambung
Keyword(s):  
Diesel Engine ◽  
Cooling System ◽  
Mechanical Energy ◽  
Research Work ◽  
Combustion Process ◽  
Motor Fuel ◽  
Suction Side ◽  
Heat Energy ◽  
Engine Components ◽  
Main Engine

Diesel engine is one type of piston motor fuel, whose fuel combustion occurs due to high air pressure in the combustion chamber. The combustion process diesel engine generates heat energy and raises the high pressure in the cylinder, the pressure is comverted to mechanical energy on the crankshaft. Then the cooling system is needed on the main engine. The cooling system is one system that functions to maintain the engine temperature at a certain temperature in accordance with the design specified so that the diesel engine can operate sustainably. This research work aims to find out how to work the ship’s cooling system, to find out how to maintain the ship’s cooling system, to find out the interference that occurs in the cooling system and to make repairs. The working of the cooling system at KM Sumber Fortuna use a cooling system indirectly / closed by using a heat excanger as a place to heat the heat excanger media by circulating fresh water to the entire machine to remove heat arising from combustion and friction in the engine. The method of maintenance is carried out with the duty service for 4 hours, the service carried ou is to check all the engine components in KM Sumber fortuna. While the damage occurred in the seawater suction pipe which had leaked in the pipe binder and replaced the leaked pipe by cutting the new pipe or hose and clamping the pipe / hose on the suction side of the heat exchanger.

scholarly journals Evaluasi Kebutuhan Udara Ventilasi Untuk Kamar Mesin Karena Penggantian Rpm Motor Penggerak Axial Fanpada Kapal Perintis 2000GT Berpenggerak Mesin Induk (Main Engine) 2 x 1400HP

Eksergi ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 7
Author(s):  
Ratna Dwi Kurniawan
Keyword(s):  
Engine Room ◽  
Engineering Department ◽  
Marine Engineering ◽  
Main Engine

<p>Sistem ventilasi udara untuk kamar mesin (engine room) memegang peranan sangat pentinng sekali, sebagai suplai udara pembakaran mesin dan mendinginkan udara di ruang kamar mesin. Jika suplai bahan bakar kekurangan udara/oksigen (O2) berpengaruh pada power yang dihasilkan, sehingga effisiensi turun. Latar belakang penulisan karena adanya penggantian putaranmotor fan/blower penyuplai udara ventilasi untuk main engine, sehingga perlu di lakukan perhitungan ulang untuk mendapatkan kebutuhan udara yang sesuai dengan kebutuhan. Metode ASHRAE dan ISO 8861 telah digunakan peneliti lain pada kapal sejenis di lain galangan. Sebagai bahan pembanding, metode yang digunakan dalam penelitian ini adalah penggunaan user guide dari marine engineering department yang lebih sederhana.Dari hasil evaluasi diketahuikebutuhan untuk udara pembakaran main engine 5259,39 m3/h paling kecil diantara metode lain, tetapi total kapassitas udara untuk pembakaran main engine dan difusi panas, berada diantara metode ASHARE dan ISO 8861, yaitu sebesar 23.053,37cfm sedang kapasitas fan yang tepasang 30000cfm,</p>

scholarly journals An Economical and Precise Cooling Model and Its Application in a Single-Cylinder Diesel Engine

2021 ◽  
Vol 11 (15) ◽  
pp. 6749
Author(s):  
Zhifeng Xie ◽  
Ao Wang ◽  
Zhuoran Liu
Keyword(s):  
Diesel Engine ◽  
Cooling System ◽  
Combustion Engine ◽  
Electronic Control Unit ◽  
Total Power ◽  
Dynamical Characteristic ◽  
Water Jacket ◽  
Single Cylinder ◽  
Pump Speed ◽  
Total Power Consumption

The cooling system is an important subsystem of an internal combustion engine, which plays a vital role in the engine’s dynamical characteristic, the fuel economy, and emission output performance at each speed and load. This paper proposes an economical and precise model for an electric cooling system, including the modeling of engine heat rejection, water jacket temperature, and other parts of the cooling system. This model ensures that the engine operates precisely at the designated temperature and the total power consumption of the cooling system takes the minimum value at some power proportion of fan and pump. Speed maps for the cooling fan and pump at different speeds and loads of engine are predicted, which can be stored in the electronic control unit (ECU). This model was validated on a single-cylinder diesel engine, called the DK32. Furthermore, it was used to tune the temperature of the water jacket precisely. The results show that in the common use case, the electric cooling system can save the power of 255 W in contrast with the mechanical cooling system, which is about 1.9% of the engine’s power output. In addition, the validation results of the DK32 engine meet the non-road mobile machinery China-IV emission standards.

scholarly journals Lex-Pos Feature-Based Grammar Error Detection System for the English Language

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1686 ◽  
Author(s):  
Nancy Agarwal ◽  
Mudasir Ahmad Wani ◽  
Patrick Bours
Keyword(s):  
Error Detection ◽  
Network Architecture ◽  
English Language ◽  
Short Term Memory ◽  
Detection System ◽  
Structural Characteristics ◽  
Contextual Information ◽  
Systems Model ◽  
Part Of Speech ◽  
Induction Technique

This work focuses on designing a grammar detection system that understands both structural and contextual information of sentences for validating whether the English sentences are grammatically correct. Most existing systems model a grammar detector by translating the sentences into sequences of either words appearing in the sentences or syntactic tags holding the grammar knowledge of the sentences. In this paper, we show that both these sequencing approaches have limitations. The former model is over specific, whereas the latter model is over generalized, which in turn affects the performance of the grammar classifier. Therefore, the paper proposes a new sequencing approach that contains both information, linguistic as well as syntactic, of a sentence. We call this sequence a Lex-Pos sequence. The main objective of the paper is to demonstrate that the proposed Lex-Pos sequence has the potential to imbibe the specific nature of the linguistic words (i.e., lexicals) and generic structural characteristics of a sentence via Part-Of-Speech (POS) tags, and so, can lead to a significant improvement in detecting grammar errors. Furthermore, the paper proposes a new vector representation technique, Word Embedding One-Hot Encoding (WEOE) to transform this Lex-Pos into mathematical values. The paper also introduces a new error induction technique to artificially generate the POS tag specific incorrect sentences for training. The classifier is trained using two corpora of incorrect sentences, one with general errors and another with POS tag specific errors. Long Short-Term Memory (LSTM) neural network architecture has been employed to build the grammar classifier. The study conducts nine experiments to validate the strength of the Lex-Pos sequences. The Lex-Pos -based models are observed as superior in two ways: (1) they give more accurate predictions; and (2) they are more stable as lesser accuracy drops have been recorded from training to testing. To further prove the potential of the proposed Lex-Pos -based model, we compare it with some well known existing studies.

Main engine of transport ship inlet air cooling by ejector chiller

2020 ◽  
Vol 5 (3) ◽  
pp. 33-48
Author(s):  
Roman M. Radchenko1 ◽  
◽  
Dariusz Mikielewicz2 ◽  
Mykola I. Radchenko1 ◽  
Victoria S. Kornienko1 ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Air Temperature ◽  
Temperature Drop ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Slow Speed ◽  
Exhaust Gases ◽  
Transport Ship ◽  
Main Engine

The efficiency of cooling the air at the inlet of marine slow speed diesel engine turbocharger by ejector chiller utilizing the heat of exhaust gases and scavenge air were analyzed. The values of air temperature drop at the inlet of engine turbocharger and corresponding decrease in fuel consumption of the engine at varying climatic conditions on the route line Odesa-Yokogama- Odesa were evaluated.

Lessons from Emma Maersk Flooding – February 2013

2015 ◽  
Author(s):  
Chilukuri Maheshwar
Keyword(s):  
Lessons Learned ◽  
Suez Canal ◽  
Container Ship ◽  
Engine Room ◽  
Mechanical Breakdown ◽  
Engine Cylinder ◽  
The Cost ◽  
Main Engine

In February 2013, in the 2005 built 15500 TEU 397m long container ship EMMA MÆRSK a severe leakage occurred in as it was passing southbound through the Suez Canal. The leakage occurred due to mechanical breakdown of a stern thruster causing flooding of the shaft tunnel and filling up the engine room with 14000 m³ of seawater within a span of two hours, submerging the main engine cylinder heads-level equal to the outside water draft of 15.1 m. The cost of repairs and loss of revenue for six months amounted to a few million dollars. This paper highlights some of the lessons learned from this incident.

Efficient Intrusion Detection for High-Speed Networks

2012 ◽  
Vol 263-266 ◽  
pp. 2915-2919
Author(s):  
Gao Long Ma ◽  
Wen Tang
Keyword(s):  
Intrusion Detection ◽  
Error Detection ◽  
Intrusion Detection System ◽  
High Speed ◽  
Detection System ◽  
Heavy Traffic ◽  
High Speed Networks ◽  
Network Intrusion ◽  
Traffic Loads ◽  
Rule Sets

With the great increasing of high-speed networks,the traditional network intrusion detection system(NIDS) has a serious problem with handling heavy traffic loads in real-time ,which may result in packets loss and error detection . In this paper we will introduce the efficient load balancing scheme into NIDS and improve rule sets of the detection engine so as to make NIDS more suitable to high-speed networks environment.

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