scholarly journals Matrix Fmea Analysis as a Preventive Method for Quality Design of Hydraulic Components

2019 ◽  
Vol 1 (1) ◽  
pp. 684-691 ◽  
Author(s):  
Joanna Fabiś-Domagała ◽  
Hassan Momeni ◽  
Mariusz Domagała ◽  
Grzegorz Filo
Keyword(s):  
Hydraulic System ◽  
Analysis Method ◽  
Practical Application ◽  
Important Group ◽  
Basic Assumptions ◽  
Preventive Method ◽  
Quality Design ◽  
Fmea Method ◽  
Fmea Analysis ◽  
Preventive Methods

AbstractPreventive methods are important group of methods used in the process of design and which are known as quality design methods. The aim of these methods is identification of potential failures and cause-and-effect relationships in consistent and systematic way, and then taking appropriate preventive or corrective actions. The well-known examples of preventive methods also used for modelling and analysis of the criticality (risk) factor are FMEA analysis and FTA analysis. A matrix FMEA analysis method has been presented and discussed in the work. The basic assumptions related to this method were characterized and algorithms for each stages of analysis have been presented. It has been presented practical application of FMEA method on example of selected components of hydraulic system.

scholarly journals Matrix FMEA Analysis of the Flow Control Valve

2019 ◽  
Vol 1 (1) ◽  
pp. 590-595
Author(s):  
Joanna Fabis-Domagala ◽  
Hassan Momeni ◽  
Mariusz Domagala ◽  
Grzegorz Filo ◽  
Saeed Bikass ◽  
...  
Keyword(s):  
Flow Control ◽  
Failure Modes ◽  
Control Valve ◽  
Flow Control Valve ◽  
Engineering Systems ◽  
Analysis Method ◽  
Improvement Method ◽  
Fmea Analysis ◽  
Preventive Methods ◽  
Quality Improvement Method

Abstract Reliability is a key feature in engineering systems and might be improved by using preventive methods, which allows for identification potential failures and establishing cause-and-effect relationships in consistent and systematic way. One of the popular quality improvement method is FMEA (Failure Modes and Effects Analysis). An application of matrix FMEA analysis method on example of flow control valve has been presented and discussed in the work. Presented example shows also a different ways of evaluating failures and theirs influence on analysis results.

Study and Analyse Hydraulic System of a Boat by Using Risk Analysis Method

2012 ◽  
Vol 542-543 ◽  
pp. 119-123
Author(s):  
Ning Li ◽  
Yuan Gu ◽  
Shi Long Xing ◽  
Lu Li
Keyword(s):  
Risk Analysis ◽  
Failure Probability ◽  
Hydraulic System ◽  
Fault Tree ◽  
Minimum Cut ◽  
Analysis Method ◽  
Reliability Method ◽  
Cut Set ◽  
Working Out

Analysis hydraulic system of a boat by using reliability method, setting up the fault tree, confirming the minimum cut set, working out the failure probability and the criticality importance of all base events. The datum is provided for security and maintainability.

Software Quality Evaluation for Control System Based on Extension Theory

2014 ◽  
Vol 945-949 ◽  
pp. 3331-3335
Author(s):  
Xiao Ying Liu ◽  
Jian Zhang
Keyword(s):  
Control System ◽  
Software Quality ◽  
Quality Evaluation ◽  
Evaluation Method ◽  
Mechanical Design ◽  
Engineering Analysis ◽  
Analysis Method ◽  
Practical Application ◽  
Software Quality Evaluation ◽  
Function Calculation

A software quality evaluation method for control system based on the extension engineering analysis method is proposed. The evaluating index system of software quality evaluation for control system was constructed. The matter elements models were constructed, and the goodness of mechanical design scheme was computed by using goodness evaluation method based on correlation function calculation. Then the pros or cons of system to be evaluated were determined by comparing the goodness value of each evaluation grade. Finally, the practical application showed that the evaluation method was scientific, clear, and effective and had good practicality.

An Adding Mass Method for Stiffly Mechanical System Simulation and Applications to Construction Machinery

2001 ◽  
Author(s):  
Etsujiro Imanishi ◽  
Satoshi Yonezawa ◽  
Naoki Sugano ◽  
Eiko Hirooka ◽  
Takahiro Kobayashi
Keyword(s):  
Mechanical System ◽  
Dynamic Simulation ◽  
Hydraulic System ◽  
Piecewise Linear ◽  
Hydraulic Systems ◽  
Practical Application ◽  
Construction Machinery ◽  
Linear Elements ◽  
Improvement Method ◽  
And Control

Abstract A characteristic improvement method for dynamic simulation of a stiff mechanical system by adding mass is presented. Hydraulic systems with check valves and control valves on construction machinery exhibit piecewise-linear characteristics for hydraulic flow rate and spool stroke. The proposed improvement method involves no time delay in determining the mass by considering both eigenvalue distortion of the system and time response. This paper shows a practical application to the boom derricking system of a rough terrain crane, and demonstrates that this method is useful for dynamic simulation of hydraulic system including stiff piecewise-linear elements.

scholarly journals Parameters Assessment of the FMEA Method by Means of Fuzzy Logic

2018 ◽  
Vol 2 (Special edition 2) ◽  
pp. 123-132
Author(s):  
Jasminka Bonato ◽  
Martina Badurina ◽  
Julijan Dobrinić
Keyword(s):  
Fuzzy Logic ◽  
Failure Analysis ◽  
Failure Mode ◽  
Mathematical Function ◽  
Analysis Method ◽  
Effect Analysis ◽  
New Approach ◽  
System Failures ◽  
Numerical Indicator ◽  
Fmea Method

The paper aims at presenting the FMEA method based on the fuzzy technique, representing a new approach to the failure analysis and its effects on the observed system. The FMEA (Failure Mode and Effect Analysis) method has assigned the risks a coefficient i.e. a numerical indicator that very clearly defines the degree of risk. The risk is calculated as a mathematical function of RPN which depends on the effects S, probability O that some case will lead to a failure and to a probability that a failure D can not be detected before its effects are realized. RPN = S O D. The FMEA method, based on the fuzzy logic, makes a more reliable evaluation of the observed system failures possible.

Application of FMEA method for an analysis of selected production process

2018 ◽  
Vol 1 (91) ◽  
pp. 34-60
Author(s):  
A. Kania ◽  
K. Cesarz-Andraczke ◽  
J. Odrobiński
Keyword(s):  
Production Process ◽  
Technical Analysis ◽  
Risk Level ◽  
Preventive Actions ◽  
Applied Technology ◽  
Fmea Method ◽  
Fmea Analysis ◽  
And Training ◽  
Practical Implications

Purpose: The article presents an application of FMEA method in a process of chimney system production. The analysis allowed to decrease a potential defects and their effects in the analysed process. Design/methodology/approach: The technical analysis of the process of chimney system production indicated many defects in the product. Based on the FMEA results (value of RPN – Risk Priority Number) corrective and preventive actions were proposed. These actions decrease RPN level by half. Findings: In this paper characteristics of the chimney system and technical analysis of its production process were presented. Failure mode and effects analysis for selected operations of the production process was performed. Practical implications: In the analysed process are possible the nonconformities above the appointed RPN level, because they are dependent on applied technology and machinery. Increase of a quantity of control points and training employees caused a reduction of manufacturing costs, improvement of the product quality and creation of the possibility of effective quality control. Originality/value: FMEA analysis is an effective tool for identification, determination of a risk level, planning and implementation of corrective and preventive actions to decrease a quantity of defects in the final product. Periodic application of this method enables the continuous improvement of the processes and products in enterprises.

Evaluating the Risk of Failure on Injection Pump Using Fuzzy FMEA Method

2014 ◽  
Vol 657 ◽  
pp. 976-980 ◽  
Author(s):  
Nicoleta Rachieru ◽  
Nadia Belu ◽  
Daniel Constantin Anghel
Keyword(s):  
Failure Mode ◽  
Traditional Method ◽  
Assessment Model ◽  
Risk Level ◽  
Analysis Method ◽  
Effect Analysis ◽  
Pump Design ◽  
Injection Pump ◽  
Fuzzy Fmea ◽  
Fmea Method

This research is aimed at utilizing failure mode and effect analysis (FMEA) which is a reliability analysis method applicable to rotary injection pump design. In traditional FMEA, Risk Priority Number (RPN) ranking system is used to evaluate, the risk level of failures to rank failures and to prioritize actions. RPN is obtained by multiplying the scores of three risk factors like the Severity (S), Occurrence (O) and Detection (D) of each failure mode. RPN method can not emphasise the nature of the problem, which is multi-attributable and has a group of experts' opinions. Furthermore, attributes are subjective and have different importance levels. In this paper, a framework is proposed to overcome the shortcomings of the traditional method through the fuzzy set theory. Two case studies have been shown to demonstrate the methodology thus developed. It is illustrated a parallel between the results obtained by the traditional method and fuzzy logic for determining the RPNs. We expect that fuzzy FMEA model will assist FMEA team in assess and rank risks more precisely compared with risk assessment model of method.

scholarly journals Inertial Sensor-Based Motion Analysis of Lower Limbs for Rehabilitation Treatments

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Tongyang Sun ◽  
Hua Li ◽  
Quanquan Liu ◽  
Lihong Duan ◽  
Meng Li ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Quantitative Evaluation ◽  
Degrees Of Freedom ◽  
Subjective Experience ◽  
Inertial Sensors ◽  
Inertial Sensor ◽  
Lower Limbs ◽  
Analysis Method ◽  
Practical Application ◽  
Input Signals

The hemiplegic rehabilitation state diagnosing performed by therapists can be biased due to their subjective experience, which may deteriorate the rehabilitation effect. In order to improve this situation, a quantitative evaluation is proposed. Though many motion analysis systems are available, they are too complicated for practical application by therapists. In this paper, a method for detecting the motion of human lower limbs including all degrees of freedom (DOFs) via the inertial sensors is proposed, which permits analyzing the patient’s motion ability. This method is applicable to arbitrary walking directions and tracks of persons under study, and its results are unbiased, as compared to therapist qualitative estimations. Using the simplified mathematical model of a human body, the rotation angles for each lower limb joint are calculated from the input signals acquired by the inertial sensors. Finally, the rotation angle versus joint displacement curves are constructed, and the estimated values of joint motion angle and motion ability are obtained. The experimental verification of the proposed motion detection and analysis method was performed, which proved that it can efficiently detect the differences between motion behaviors of disabled and healthy persons and provide a reliable quantitative evaluation of the rehabilitation state.

scholarly journals Analisis Penyebab Kerusakan Hot Rooler Table dengan Menggunakan Metode Failure Mode And Effect Analysis (FMEA)

2018 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Muhamad Bob Anthony
Keyword(s):  
Failure Mode ◽  
Section Mill ◽  
Effect Analysis ◽  
Iron And Steel ◽  
Furnace Section ◽  
Human Aspects ◽  
Process Failure ◽  
Mill Unit ◽  
Fmea Method ◽  
Fmea Analysis

This research was conducted in an international company engaged in iron and steel products manufacturing industries. One of the equipment that is often damaged is a hot roller table machine in the furnace section mill unit. The availability results obtained in hot roller table equipment is 96.571% and is still below the company standard which is set at 98%. Therefore, we need an analysis of the root causes of the problem and search for the best solution to fix the existing problem by applying the method of Failure Mode and Effect Analysis (FMEA). FMEA is a method that can systematically and structurally analyze and identify the consequences of a system or process failure, and also reduce or analyze the probability of failure. The purpose of this study is to identify and analyze the level of damage and its causes with the application of the FMEA method. Based on the pareto diagram the damage to the hot roller table machine, it was found that the highest frequency of damage was in the rotary coupling with a down time percentage of 26.9%. From the FMEA Analysis, two components that have very high RPN values are categorized as potential severit i.e. bearing as the first with an RPN value of 392 and the second is a seal ring with an RPN value of 294. The two components are the main priority for repair of the furnace section. mill, especially for machine and human aspects.

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