Chathusanka Jayasingha

HSD, POC**_B, UMBC, **** Hilltop Circle, Baltimore, Maryland 21250

Phone: 240-***-**** Email: ac5k5v@r.postjobfree.com

Skills

Software: Solidworks, AutoCAD, MATLAB, Microsoft Office Suite, Arduino, LabVIEW, Photoshop

Machining: Lathe machine, Milling machine, CNC lathe machine

Programming: CNC lathe G-Code, Java, C#, HTML, PHP, Dreamweaver Education

Infortec International, Sri Lanka

Higher Diploma in Computer Science September 2011- September 2012 University of Maryland Baltimore County (ABET Accredited) August 2014- May 2018 Baltimore, Maryland

Bachelor of Science in Mechanical Engineering (3.806 GPA)

A senior year student with 124 credits completed.

Honors: President's list 2014, 2015, and 2016.

Expected graduation in May 2018.

Relevant coursework (Upper level courses)

ENME 204- Introduction to engineering design with CAD ENME 321- Transfer process

ENME 320- Fluid mechanics ENME 360- Vibrations

ENME 301- Structure and properties of engineering material ENME 304- Machine design

ENME 444- Mechanical engineering system design ENME 408- Mechatronics

ENME 432L- Fluids and energy laboratory ENME 423- Heat, Vent, AC design

ENME 482L- Vibrations and controls laboratory ENME 403- Automatic controls

ENME 425- Internal combustion engines ENME 482L-Vibrations/controls lab. Design projects

Winery Netting Capstone Project

Currently I am working with a team of four to design and build a netting machine within 15 weeks for Old Westminster Winery. The issue at hand is that ripe grapefruits get eaten by birds. To prevent this they cast netting on the trellises. Currently this is done by hand and the process is very tedious and time consuming. Our goal is to reduce the time and effort put into it by introducing a machine to accomplish this task. We already met with our client and got a good understanding of the requirements they need for this machine. It requires at least four people to operate the machine. The CAD model has already been built using SOLIDWORKS. The next step is to build the first prototype. We are planning on building the main frame by welding steel, which provides stability. The main goal of this prototype is to test if the system can operate without flipping over as we believe it is the critical issue with our current design. We also intend to do a stress analysis as well to ensure the system can support all external and internal forces. So far we are on track and hope to finish building the machine by the time given.

Golf Putter Competition

I collaborated with a team of four to design and build a golf putter that can successfully putt a golf ball for a competition. A lot of the designs were considered, but eventually we settled on the design that both minimizes the weight and reduces the time to putt as they play a critical part in scoring. Moreover, we performed calculations to figure the length of the putter as well as the height it should achieve and selected the components such as belts, pulleys conforming to our calculations. Aluminum was used as the preferred metal to build main supports due to lightness. A CAD model of our design was created in SOLIDWORKS to simulate if it achieves the motion we needed it to achieve. Then a finite element analysis was performed to make sure there won’t be any failures during the operation. Once the CAD model was completed we started machining parts. We machined most of the parts by ourselves using the lathe and milling machines. Once we put everything together it was time to test it. We had to make small tweaks to the design during testing to increase the accuracy and persistence of the machine. Due to these small improvements we ended up scoring second place in the competition. Arduino Dot Finder

This project was done for my mechatronics class and involved working with sensors as well as a lot of Arduino programming. The goal of this project was to create a control system that can detect the location of several dots on a 6”x6” Lexan sheet. An infrared sensor was used to detect dots and then the locations were stored in an array with x and y coordinates. We decided to use a rail system that consisted of pulleys and belts to transmit the power. The system is designed to sweep the sensor head along the plane in a zigzag pattern using two stepper motors. Certain calculations were done to determine the type of pulleys and belts to use and to ensure the belt won’t slip during operation. After creating the CAD model for the initial design using SOLIDWORKS, we moved to build our first prototype. During testing, we realized that the bar the sensor was attached to had significant binding issues. Therefore, we redesigned the bar to give more freedom over the movement of the sensor. Our final system was able to successfully identify all the dots. Food Dispenser for Hamsters

I worked with a team of four to build a mechanism to feed hamsters. The goal was to create a food dispenser that can be activated by the hamster itself by running on the runner wheel. With some research we found that there are other automated hamster feeders but they are somewhat expensive compared to our cost of production. I along with one of my teammates worked on the CAD model in SOLIDWORKS. Once the CAD model was a success, we then moved to building the feeder. Most of the feeder was constructed of wood with some components being 3D printed. A stress analysis was also performed through SOLIDWORKS to ensure that the design is safe. The final product worked as we intended. Wheelchair Ramp

In this project, we designed a wheelchair ramp for a family in need of one with a team of four. All the details and important measurements of the location were provided. We stated off the project by brainstorming designs and finally came up with a reasonable design. The design also had to meet handicap ramp standards. SOLIDWORKS was used to create a CAD model of the design. We were also required to build a complete prototype of the final design according to the correct proportions. One hurdle we faced and overcame was that, the woods and tools the team bought made it almost impossible to build it and we were required to come up with a solution for this in two days if we were going to finish it by due date. Then I discovered that coffee stirrers were a great substitute material freely available on campus which also made the cutting process easier. The end result was a neat prototype that was commended as the best looking prototype out of all the groups. VEX Robot Competition

Worked in a team of 4 to build a VEX robot to compete in a competition which had 4 challenges. One of the overall goals was to also stay under a proposed cost constraint. The ROBOTC programming language was used to program the robot. Not only did we finish building the robot under the given time limit to finish the project, we also successfully completed all four challenges and then won second place for the most cost effective robot.

Experience

Punsara Auto Cables (pvt) Ltd June 2017 – August 2017

CNC and lathe machining internship

Machined inner and outer cable components using lathe and CNC lathe machines