Course Title: Aerospace Mechanisms
Part B: Course Detail
Teaching Period: Term1 2009
Course Code: AERO5392
Course Title: Aerospace Mechanisms
School: 130T Vocational Engineering
Campus: City Campus
Program: C6011 - Advanced Diploma of Engineering (Aerospace)
Course Contact: Program Manager
Course Contact Phone: +61 3 9925 4468
Course Contact Email: engineering-tafe@rmit.edu.au
Name and Contact Details of All Other Relevant Staff
Teacher : Yadana Wai
Contact Detail
Location: 57.5.20
Telephone: 9925 4461
Fax: 9925 8099
E-mail: yadana.wai@ rmit.edu.au
Nominal Hours: 40
Regardless of the mode of delivery, represent a guide to the relative teaching time and student effort required to successfully achieve a particular competency/module. This may include not only scheduled classes or workplace visits but also the amount of effort required to undertake, evaluate and complete all assessment requirements, including any non-classroom activities.
Pre-requisites and Co-requisites
MATH5156 Aerospace Mathematics 1
ONPS5098 Aerospace Physics 1
ONPS5100 Aerospace Physics 2
AERO5390 Stress 1
Course Description
The purpose of this course is to provide training in aerospace mechanisms, power transmission devices and associated calculations.
This course involves the principles of analysis and design of mechanical sub-systems commonly used in aircraft. Areas of study include: friction and gear mechanism, linkages, bearings and mechanical vibrations.
National Codes, Titles, Elements and Performance Criteria
National Element Code & Title: |
VBH740 Aerospace Mechanisms |
Element: |
Analyse linkage operation and calculate stresses in linkages. |
Performance Criteria: |
• Explain the operation of simple aircraft linkage mechanisms, including levers and bellcranks |
Element: |
Explain and evaluate a range of types of bearings and perform calculations relating to bearings. |
Performance Criteria: |
• Describe the operating principles of plain bearings |
Element: |
Explain aspects of mechanical vibration and perform related calculations. |
Performance Criteria: |
• Describe the nature of vibrations |
Element: |
Explain concepts and perform calculations related to torque transmissions driven through friction mechanisms. |
Performance Criteria: |
• Explain applications of friction mechanisms in aircraft |
Element: |
Explain in words and diagrams the manufacture and operation of gear mechanisms and perform related calculations. |
Performance Criteria: |
• Describe common gear types and their applications including: |
Learning Outcomes
1. Explain concepts and perform calculations related to torque transmissions driven through friction mechanisms.
2. Analyse linkage operation and calculate stresses in linkages.
3. Explain and evaluate a range of types of bearings and perform calculations relating to bearings.
4. Explain in words and diagrams the manufacture and operation of gear mechanisms and perform related calculations.
5. Explain aspects of mechanical vibration and perform related calculations.
Details of Learning Activities
The purpose of this module is to provide competency based training in aerospace mechanisms, power transmission devices and associated calculations. This module also facilitates articulation into Aerospace and Engineering degree courses. This course will cover the areas in frictrion mechanisms, linkages, bearings, gear mechanisms and mechanical vibrations.
The students will participate in activities such as the class lectures, tutorials and exercises, assignment and exam.
Teaching Schedule
Teaching Schedule
Session | Topic | Note |
1 | Introduction to the subject, basic concepts of force, torque, energy, power, work, linear and angular displacement, velocity and acceleration. | Lecture & Class Exercise |
2 | The concept of friction, coefficient of friction and properties of friction materials. The forces acting on a body on an inclined surface. Brakes and clutches. Types of clutches and brakes. | Lecture & Class Exercise |
3 | Common methods of brake/clutch actuation in aircraft. Torque transmitted by brakes/Clutches. | Lecture & Class Exercise |
4 | Common methods of brake/clutch actuation in aircraft. Torque transmitted by brakes/Clutches. | Lecture & Class Exercise |
5 | Inclined planes, Power Screws, linkages, force transfer calculations on static linkages mechanical advantage. | Lecture & Class Exercise |
6 | Introduction to gears. Common gear types and their applications. Relationships between rotational speed, number of teeth, pitch circle diameters, torque and centre distances for simple gear trains and for compound gear trains. | Lecture & Class Exercise |
7 | Introduction to gears. Common gear types and their applications. Relationships between rotational speed, number of teeth, pitch circle diameters, torque and centre distances for simple gear trains and for compound gear trains. | Lecture & Class Exercise |
8 | Bearings. Types of bearings. Plain bearing, ball, roller, foil and self-aligning. Applications of rolling element bearings in aircraft. Calculations of static and dynamic loads. |
Lecture & Class Exercise. Assignment is issued. |
9 | Mechanical Vibration. The nature of vibrations & sources of vibration in aircraft. Damping. Free Vs forced Vibration. Differential equation of motion for an undamped & damped one degree of freedom system subject to free vibration. Calculations of • natural frequency • maximum amplitude • displacement at a given time | Lecture & Class Exercise |
10 | Differential equation of motion for a damped and undamped, one degree of freedom system, subject to forced vibration. Calculation of natural frequency maximum amplitude amplitude ratio maximum amplitude ratio (damped) phase angle between the response and the forcing function (damped) . | Lecture & Class Exercise |
11 | Revision & Tutorial | Assignment is due |
12 | Closed Book Exam |
Learning Resources
Prescribed Texts
References
Hannah, J., and Stephens, R.C., 1984., Mechanics of Machines, Elementary Theory and Examples., E.Arnold, London. ISBN 0713134712 |
Other Resources
Class notes, lectures and exercises.
Overview of Assessment
To successfully complete this course the student is required to pass written assessment tasks and demonstrate skills and ability by completing pratical tasks to aerospace standard.
Assessment Tasks
Participants are required to complete two assessment tasks. The first assessment task is an assignment worth 30% and the second assessment task (70%) is a closed book final examination at the end of the course.
Assessment Item 1 (30%): ASSIGNMENT
Assessment Item 2 (70%): FINAL EXAMINATION
Grading Criteria
HD High Distinction 80 - 100 %
DI Distinction 70 - 79 %
CR Credit 60 - 69 %
PA Pass ( High Grading available 50 - 59 %
PX Pass ( No Higher Grading available) 50 - 100 %
NN Fail 0 - 49 %
Academic Misconduct
Students are reminded that cheating, whether by fabrication, falsification of data, or plagiarism, is an offence subject to University disciplinary procedures. Plagiarism in oral or written presentations is the presentation of the work, idea or creation of another person, without appropriate referencing, as though it is one’s own. Plagiarism is not acceptable.
The use of another person’s work or ideas must be acknowledged. Failure to do so may result in charges of academic misconduct which carry a range of penalties including cancellation of results and exclusion from your course.
Students are responsible for ensuring that their work is kept in a secure place. It is also a disciplinary offence for students to allow their work to be plagiarised by another student. Students should be aware of their rights and responsibilities regarding the use of copyright material. It is strongly recommended that students refer to the RMIT 2001 Guidelines for Students or to the RMIT University Homepage.
Assessment Matrix
Assessment Matrix
Assessment Method | Learning Outcomes | Percentage |
Assignment | 1 to 5 | 30% |
Closed book exam | 1 to 5 | 70% |
Course Overview: Access Course Overview