Overview

I am Siti Asza Shahiza Mohd Shariaf, I will be graduating my Bachelor of Engineering in July 2014. I am majoring in Mechanical and Material Engineering in Australian National University (ANU). Apart of mechanical and material engineering courses, I also took solar and renewable energy courses as my elective courses leading me to finish three months practical experience in one of solar installer company in Malaysia. With awareness of mastering other language other than English and my mother-tongue language (Malay), I decided to learn basic in Mandarin Language. 

I divided my projects into three separate section in the website; Business Project, Engineering Project and Recent Project.  Business Project is the project that I have done during my practical experience and covers renewable sources engineering discipline. Engineering project is the project that combined all engineering discipline learnt in my entire study period including mechanical, materials, manufacturing, management and accounting areas.  Recent project is my final year project that covers new material development.

Course List

Bachelor of Engineering

First Semester,2010
COMP1100  - Introduction to Programming and Algorithms
ENGN1211  - Discovering Engineering
MATH1013 - Mathematics and Applications
PHYS1101   - Advanced Physics

Second Semester,2010
ENGN1215  - Engineering Sciences
MATH1014 - Mathematics and Applications 2
ENGN1217 - Introduction to Mechanics
ENGN1218 - Introduction to Electronics

First Semester,2011

ENGN2217 - Mechanical System and Design

ENGN2218 - Electronic System and Design

ENGN2225 - Systems Engineering Design

Second Semester,2011

ENGN2221 - System Dynamics

ENGN2222 - Thermal Energy Systems

ENGN2219 - Computing for Engineering Simulation

ENGN2226 - Systems Engineering Analysis

First Semester,2012
ENGN3212 - Manufacturing Technologies
ENGN3224 - Energy Systems Engineering
ENGN3211 - Investment Decisions and Financial Systems
ENGN3601 - Engineering Materials

Second Semester,2012
ENGN3221 - Engineering Management
ENGN3334 - Semiconductors
EMET1001 - Foundation of Economics and Financial Models

First Semester,2013
ENGN4221 - Systems Engineering Project
CHIN1012  - Modern Chinese 1A : Spoken Chinese
ENGN4524 - Photovoltaic Technologies
ENGN4420 - Sustainable Product Development

Second Semester,2013
ENGN4615 - Finite Element Analysis
ENGN4511 - Composite Materials
ENGN3230 - Engineering Innovation
ENGN4200 - Individual Project

First Semester,2014
ENGN3100 - Practical Experience
ENGN4200 - Individual Project
DESA2013 - Web Design
INDN3004 - Reading in Southern East Asian Culture

Resume

Internship Experience

Curriculum Vitae

Approval Letter Completing Internship

Sample Document Link :
https://drive.google.com/file/d/0BxTY6TXrzr8KSUxiTnlQd09ibkU/edit?usp=sharing

Engineering Projects

MANUFACTURING PROCESS OF REMOTE CONTROL SAILING BOAT

This project is done for the purpose of fulfilling the requirement for Manufacturing Technologies course in Australian National University.

The manufacturing process began with the formation of the hull using the vacuum forming machine. It was then followed by the construction of the deck, which was based on the outer shape of the hull.  The design of the hull was retained from the conceptual design, which was the design based on the standard mould provided. The standard wooden mould provided has a dimension of 466mm in length, 78.3mm in maximum depth and 126.1mm in maximum width. The hull was manufactured using the vacuum forming process in the workshop.

The deck was made by a sheet of balsa wood, which was formed by cutting it in accordance to the shape of the hull using an electric saw. It was then sanded by the various sanders provided.

Placement of Components :

The center of gravity of the sailing boat was then obtained followed by the calculation of moments of the individual components that has to be placed below the deck. A still water test was conducted after the hull was filled with expander foam. This allowed the team to observe the water level of the hull before the placement of individual components and predict the allowable water level after the assembling of the components on the sailing boat.

 Figure 1 : Hull Filled with  Expander Foam

Referring back to the CAD assembly drawing of the sailing boat designed during the conceptual design stage, the value of the center of gravity was obtained. The position of the center of gravity of the sailing boat will assist in determining the position of the keel and mast. As these two components are protuding vertically, they have to be aligned with respect to the center of gravity.

Figure 2 : Placement of Components

The placement for these components is in line with the law of moments. That is, by taking the point of the center of gravity as moment equals to zero, the left side and right side of this point will be close to equilibrium, given a proportional weight and distance distribution from the center of gravity. 

Manufacture of Keel and Brass Weight :

The keel and brass weight were then attached on to the bottom of the hull. Care was taken such that the attachment of the keel to the hull is strong; as such reinforcement was done using expander foam and superglue.

As discussed in the conceptual design report, the keel and brass weight would be used to increase the stability of the boat. Plywood was chosen as the material of the keel as it fulfills the requirements of both light weight and tough construction.The brass weight acts to lower the center of gravity as well as to prevent the sailing boat from capsizing. Hence, stability of the sailing boat is enhanced. Brass is chosen as the desired material due to relatively high density and low cost.

Figure 3 : Dimension of Keel and Brass Weight

Construction of Sail and Sail Control System :

The sails were constructed and the sail control system being implemented and tested. The main sail and jib sail were cut using the nylon sail material provided. With the triangular shape sail cut, the vertical part of the main sail was rolled against the mast which is made of aluminium tube. The main sail and the mast were then secured by stapling over the entire vertical part of the main sail. This connection between the main sail and the mast was made to be loose enough to allow for free rotation of the main sail.

Figure 4 : Main Sail on the left, Jib sail faced down on the right

A connection was established between the large servo with its attached reel on top, and the main sail, using fishing line. Two hooks, positioned in symmetry from the central line of the hull, were screwed on the deck. It can be observed through the figures below that the reel of the servo has two layers. A fishing line is wired across the top layer of the reel, through one of the hooks and finally tied to the boom of the main sail. This connection on the top layer of the reel was meant for clockwise movement of the sail. Vice versa, an anticlockwise movement of the sail was established by wiring the bottom part of the reel to the boom. The figure below illustrates the clockwise movement of the sail due to displacement of the top part of the reel.

Figure 5 : Sail Control System

Construction of the Rudder and Rudder Controller :

The other steering component of the sailing boat, the rudder, was also fitted and tested for efficiency. Using the aluminium sheet metal provided, the rudder was cut using the electric table saw according to the dimensions as shown in Figure 8 below. Two holes were then drilled on the top part of the rudder using the hand drill. A butt hinge of 25mm was then screwed on the rudder. A 1mm hole was drilled at the top of the rudder. The position of the hole was made high to prevent contact with the deck which could hinder the movement of the rudder. Next, a cylindrical screw was attached to the hole. An aluminium wire was then tied from the reel of the small servo to one end of the cylindrical screw. This connection allows movement of the rudder in the clockwise direction. Vice versa, another aluminium wire was tied to the opposite part of the reel, establishing an anticlockwise movement. The connection of the rudder control system is illustrated in the figure below.

Figure 6 :Rudder Mechanism

Conclusion :

The manufactured sailing boat has a tough body in its plastic construction. The expander foam filled in the hull, layered by a deck, helps in preventing water from entering while adding to the overall toughness of the boat. The keel and the brass weight ensure that the boat will not capsize. The sail and rudder control system, which both assist in the movement of the sailing boat, is proven to work with a reasonable level of efficiency.

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