UWE Bristol Engineering showcase 2015

Hou Yue Long
BEng Mechanical Engineering
Project Supervisor
Dr. Jason Matthews
Introduction
This project is Constraint-based modelling-application to the conceptual design of an aircraft. A constraint-based methodology which is successfully applied to
a variety of engineering problems from a wide range of disciplines. Initially conceived from investigations of the engineering design process, the methodology
has helped design engineers to identify and understand the initial limitations placed upon a system.
The aircraft conceptual design phase is most important part of the aircraft design process. It is activities are characterized by the definition and comparative
evaluation of numerous alternative design concepts potentially satisfying an initial statement of design requirements.
Aircraft design obviously depends on the reliable calculation of numbers. Actually, this project to design a system only input aircraft passengers and range,
then output all values, such as Max take off, Wing loading or fuselage length. To identify the relationship between all the equation is very important part to
solve this project. Next step to design a programming and use constraint- based modelling to produce full design of civil transport aircraft from output values.
Methodology
A formal methodology is very useful in a project, because it is important to
explain what research methods you used to collect your information. Having
a clear methodology is often deemed important. Clearly outlined directions
and procedures tend to increase consistency, and to create work which can
be repeated elsewhere, which is an important characteristic of rigorous
scientific research.
This project research about Constraint-based modelling-application to the
conceptual design of an aircraft. First, according to the literature, books and
internet to realize aircraft information and Constraint-based modelling
application. Second step try to collect parameter of aircraft, then analysis
these parameter. Third step understanding logic of this project and find out
equations direction and indirection relationship with passengers and range.
Next step, use excel to make a table and try to link the all equations together.
Final step apply Constraint-based modelling to product the aircraft value and
geometry.
Result and graph
Constraint-based modelling-application to the conceptual design of an aircraft
This flow chart is very clearly to show this project
methodology. First of all, need going to collect a lot of
information from literature, books and internet. There
are specific knowledge of the aircraft, including aircraft
materials, structure and the number of passengers and
range. Collection and analysis of data, and to find the
relationship between them. This project main
requirement about just enter passengers and range,
then output aircraft values. So it need to find the
relationship equation with passengers and range.
According to the passengers and range to drive
equation of aircraft. Use Excel to create a table, link the
all equation together, list all parameter and equation.
Follow the excel table logic to design programming.
According to the programming output value use
constraint-based modelling to product aircraft
geometry.
Project summary
1. Understand current state of art constraint- based
modelling.
2. Development a constraint-based design in suffice
environment.
3. Realize aircraft design processes and produce full
design of civil transport aircraft.
Project Objectives
1. Appreciate the overall design process.
2. Have experience in assisting in the development of
aircraft design from constraint- based modelling.
3. Understand the programming logic and apply it in
constraint- based modelling.
Project Conclusion
That realize Constraint is very important to
distinguish the goals of this research from related
work. A lot of applications use constraints in this way
as an efficient expression of a design.
According to the programming output aircraft
values, to construction a aircraft geometry. Use
programming to connect every, two point to
construction one line, find out fist point x, y
coordinate, then find out second x,y coordinate.
Finally construction.
Realize aircraft design processes and produce full
design of civil transport aircraft. Such as maximum
take off weight, fuselage, wing loading and tail
Aircraft design totally three parts 1. conceptual
design 2. preliminary design 3. Detail. Realize another
constraint based modelling programming language.
According find out aircraft equation relation with
passengers and range, to design programming. From
the programming output value to produce full aircraft
geometry. Then application constraint-based
modelling to optimization aircraft.
This programming language is quite similar like C
programming. Same like another programming inputcalculation-output.
Input only two parameters,
numbers of passengers and range. Use the "function"
format to connect every equation, then use output
language to output aircraft values.