Outline:
General or Specialized : Specialized
Field of learning : Design and production / management
Foundational academic disciplines : Engineering／Mechanical engineering／Production Engineering/Processing Studies
Relationship with Educational Objectives : This class is equivalent to (2) Acquire knowledge in specialized technical fields such as materials and structure, motion and vibration, energy and flow, information and measurement / control, design and production / management, and machines and systems, and can be used for designing, manufacturing, and operating machines and systems.
Relationship with JABEE programs The main : The main goals of learning / education in this class is (A), Ａ－２ . We also learned about the importance of global standards and are incidentally related to "B-1".
Course outline : Based on the mechanical engineering and electronic control engineering subjects studied in the department, we will learn what kind of process is used to design machines and systems that are active in modern society. Explain the basic concept of reliability design.
Style:
Course method :
Classes will be conducted using a projector. In addition, in order to deepen understanding, exercises will be imposed at appropriate times while considering the progress of the lesson.
Grade evaluation method :
The results of the two regular exams are evaluated equally (70%). For each examination, textbooks are not allowed. Students who score less than 60 points in each examination may have their scores changed if their understanding is confirmed through make-up exams and retests. However, the score after the change will not exceed 60 points. Evaluation is also based on exercises and reports (30%).
Notice:
Precautions on the enrollment :
Students must be completed (no more than 1/3 of the required numbers of class hours may be missed).
This subject is a "subject that requires study outside of class hours". Classes are offered for 15 credit hours per credit, but 30 credit hours are required in addition to this. Follow the instructions of your instructor for these studies.
Course advice :
This subject is a subject that considers the development from the machine element design method that has been learned in the past to the design that regards the machine as a system.
Therefore, as preparatory learning to be performed in advance, it is recommended to look back on the items learned so far while considering how the components of the machine affect the functions of the entire machine system. As background knowledge, knowledge about mechanical design, knowledge about subjects covering mechanical engineering and electronic control engineering in general, simple mathematical knowledge (understanding of algebras, and meanings and operations of symbols such as n !, exp, ln), probability Knowledge of the basics of theory and statistics (meaning of mean value, median, probability, independent event, normal distribution, etc.) is required.
Foundational subjects : In addition to subjects covering mechanical engineering and electronic control engineering in general, knowledge of mechanical design , simple mathematics and statistics, etc.
Related subjects : Energy System Engineering (Advanced Course 1st), Applied Creative Engineering (Advanced Course 1st), Strength and Fracture of Materials (Advanced Course 2nd), etc.
Attendance advice :
Basic knowledge of mechanical engineering and electronic control engineering is a prerequisite. It is important to think carefully about what manufacturing and production are.
You can be late for up to 25 minutes, and if you exceed this, you will be considered absent.
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Theme |
Goals |
| 2nd Semester |
| 3rd Quarter |
| 1st |
Guidance, Design and reliability 1 [Role and technology of reliability, quality management system]
Learning contents outside class hours [Items] (Instructions): • Product liability and reliability as quality, ○ Functions and performance, QCD (for those who are not from mechanical systems) |
Explain the significance of recognizing the concept of "reliability" and thinking about reliability for "systems".
Understand the importance of reliability issues.
Explain the basic concepts of marketing, "product out" and "market in".
You can understand the relationship between quality assurance and reliability from the point of view of product quality assurance.
It can be explained that quality is a "ruler" that represents the value of an item.
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| 2nd |
Design and reliability 2. Introduction to reliability [Reliability engineering, reliability test data analysis]
Learning content outside class hours [Items] (Instructions): • Same as above, organizing field data (histogram) |
Explain the role of reliability engineering and the evaluation scales needed to consider maintaining and improving reliability.
Understand that there are patterns in failure occurrence and explain the bathtub curve.
Understand the concept of population and specimens.
Understand the handling of reliability data.
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| 3rd |
Failure model and strength / life design 1 [Strength function and model]
Learning contents outside class hours [Items] (Instructions): • Failure as an object of reliability, relationship between strength design and reliability, random variable and probability distribution, ○ Load and strength, stress-based design, time-dependent fracture and Non-time-dependent fracture, safety factor, dynamic load coefficient |
Explain the reference strength, the relationship between the allowable stress and the safety factor, and the concept and necessity of the safety factor.
Understand the basic concepts and properties of random variables and probability distributions.
Probability can be calculated for the normal distribution.
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| 4th |
Failure model and strength / life design 2 [Progress process of metal fatigue]
Learning contents outside class hours [Items] (Instructions): • Minor rule, Paris rule, ○ Fatigue fracture, elastic deformation and plastic deformation, crystal slip, fatigue strength, S-N curve, fatigue limit |
Deepen your understanding of the fatigue properties of materials and calculate the fatigue life of structures from the miner's law (linear cumulative damage rule) and the Paris law (crack growth law).
Understand the concepts of safe life design (safe life design) and fail-safe design (damage tolerance design).
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| 5th |
Reliability scale [probability density function, distribution function, reliability function, instantaneous failure rate function]
Learning content outside class hours [Items] (Instructions): • Relationship between probability and reliability / failure rate |
Explain the structure of the machine tool body.
Explain the principles and ideas necessary to realize high-precision machining.
Understand the elemental technologies of machine tools / cutting tools technologies / machining technologies and consider measures for precision machining.
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| 6th |
Failure distribution model [probability distribution]
Learning content outside class hours [Items] (Instructions): • Discrete probability distribution and continuous probability distribution |
Understand the meaning of the binomial distribution, Poisson distribution, and exponential distribution (population probability distribution) in the probability distribution model.
Understand that there are patterns in failure occurrence and explain the bathtub curve.
The failure distribution model can be explained from the viewpoint of machine life.
It can be explained that the four functions of probability density function: f, cumulative distribution function: F, reliability function: R, and instantaneous failure rate function: λ have a series of connections.
That is, if one of the functions is known, the remaining three functions can be obtained.
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| 7th |
Reliability test 1 [Data analysis of reliability test]
Learning content outside class hours [Items] (Instructions): • Arrangement of field data (estimation and test) |
Understand reliability testing and handling of reliability data.
Given the information on the components of the system, each reliability rating scale can be calculated.
The reliability characteristic value can be estimated from the data of the time until failure or the life, and the life phenomenon can be estimated from the failure distribution model.
Understand the concept of estimation and can estimate by point estimation.
Interval estimation and test of population mean can be performed.
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| 8th |
1st semester mid-term exam |
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| 4th Quarter |
| 9th |
Return and commentary of exam answers. Distribution and prediction of reliability [system reliability model]
Learning content outside class hours [Items] (Instructions): • System reliability model (parallel and series), exponential distribution |
The reliability of series systems and parallel (redundant) systems can be calculated.
The reliability of the system can be calculated from the reliability of the parts that make up the system.
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| 10th |
Weibull plot [Weibull distribution]
Learning content outside class hours [Items] (Instructions): • life prediction: Weibull plot for field data |
The failure phenomenon and life can be estimated from the shape of the failure time distribution (failure distribution model).
It can be analyzed using Weibull probability paper.
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| 11th |
Reliability test 2 [Failure physics, reliability test]
Learning content outside class hours [Items] (Instructions): • Accelerated test, random inspection |
Understand the importance of reliability testing and reliability testing methods.
Understand the procedure for performing Weibull analysis and Arrhenius plot for life prediction by temperature acceleration.
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| 12th |
Maintainability and reliability design [Availability, reliability design]
Learning content outside class hours [Items] (Instructions): • Error recovery, maintenance and availability, ergonomics |
The reliability of the repair system can be calculated.
Explain the meaning of availability and calculate the availability of repair systems.
It can be explained that maintainability is indispensable for maintaining the reliability of the product and exerting the function of the product.
The product to be designed can be designed while considering the user and the environment.
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| 13th |
Machine safety and margin design [Safety factor and failure probability]
Learning content outside class hours [Items] (Instructions): • Stress / strength distribution model and stress based design |
Understand the outline of safety technology, which is the interface with reliability.
It is possible to design a mechanical system with consideration for safety.
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| 14th |
Reliability analysis method [Failure analysis]
Learning content outside class hours [Items] (Instructions) • Risk and failure analysis |
FMEA and FTA methods can be used as trouble prevention methods.
Risk management techniques can be used to predict and respond to failures.
By using a reliability evaluation method that solves real problems in a real way, problems such as design specifications and problems can be clarified, and logical judgments can be made for the problems.
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| 15th |
(1st semester final exam) |
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| 16th |
Return and commentary of exam answers. |
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