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论文作者:留学生论文论文属性:作业指导 assignment guidelines登出时间:2011-03-06编辑:steelbeezxp点击率:3073
论文字数:633论文编号:org201103061154363404语种:英语 English地区:英国价格:免费论文
关键词:AssignmentMechanical SystemsReliability
assignment Mechanical Systems Reliability
Value
This assignment constitutes 40% of the grade for this module.
Submission Date and Time:
Tuesday, April 3rd , 2011, 4pm.
Submission Rules
Your assignment must be submitted electronically via eLearn (Assignments tab) by the submission time, and a paper version should be submitted to the CEPS office by the same time. All materials should be contained in a Word document. No other means of submission will be accepted.
Any references to materials should be given in standard Harvard form.
The assignment should be your own work and written in your own words. Any plagiarism or copying from others will be dealt with through the university’s plagiarism procedures.
10% of students will be chosen for an oral examination to assess if the work submitted is their own work.
Learning Outcome to be assessed:
2. Analyse and predict the statistical behaviour of machine failures.
Mechanical Systems Reliability – Assignment 2010/11
Widgets plc is an Engineering company that manufactures domestic washing machines. You are a consultant that has been asked to review the effectiveness of Widgets’ ability to test its washing machines. The Director of Engineering has asked you to examine a test report (attached) from the company’s Test Department; and provide her with a critical review of the procedures and analysis that were undertaken, and the conclusion that was made.
Provide a report for the Director that contains:
1. A description of the approach that was taken to evaluate the reliability of the machines.
2. A critical review of this approach; suggesting ways in which you believe improvements could be made, both in the analysis and the procedures followed. This should include any additional analysis that you think should be undertaken.
3. Any revised conclusions.
The whole report should be no more than 3,000 words plus any diagrams, charts etc. You should submit a paper copy and also an electronic version. It will be checked against Turnitin for plagiarism.
Widgets plc.
Test report https://www.51lunwen.org/daixieassignment/
Subject: The new design of washing machine.
Sponsor: Director of Engineering.
Remit: We have been asked to test 20 of the new design of washing machine, and make recommendations on whether the 5-year guarantee currently offered can be sustained.
Method
20 machines were put on accelerated test in our laboratories. The machines were tested over a period of four weeks, and all failed within this period.
The failure data for 20 of the new design of washing machines is presented below, where the time to failure of each machine has been scaled up to estimate the actual life. Thus, for example, machine 3 actually lasted for 28 days, but because of the duty cycle employed, we can say that this represents 200 months of life in a typical household.
Machine Months to failure Machine Months to failure
1 50.0 11 6.2
2 4.8 12 30.0
3 200.0 13 40.0
4 5.2 14 3.8
5 25.0 15 60.0
6 6.7 16 70.0
7 10.0 17 80.0
8 90.0 18 12.0
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