Design Report Full

University of Southampton Malaysia Campus

DESIGN REPORT

TABLE OF CONTENTS 1. Introduction a. Group’s Aim 2. Conceptual Design Study and Selection of the Final Design a. b. c. d.

How the team prioritised the requirements How the concept sketches were generated How the mechanisms were chosen The Final Design

3. Mechanical and Electrical Systems Design Process a. Mechanical Systems i. Selection of Components ii. Mechanisms iii. Finite Element Analysis b. Electrical Systems i. Power Supply ii. Power for Components iii. Wiring Connections 4. Manufacturing Processes and Robot Assembly a. Manufacturing Process i. How manufacturing was done ii. Tolerance b. Robot assembly i. Primary Robot

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TABLE OF CONTENTS 1. Introduction a. Group’s Aim 2. Conceptual Design Study and Selection of the Final Design a. b. c. d.

How the team prioritised the requirements How the concept sketches were generated How the mechanisms were chosen The Final Design

3. Mechanical and Electrical Systems Design Process a. Mechanical Systems i. Selection of Components ii. Mechanisms iii. Finite Element Analysis b. Electrical Systems i. Power Supply ii. Power for Components iii. Wiring Connections 4. Manufacturing Processes and Robot Assembly a. Manufacturing Process i. How manufacturing was done ii. Tolerance b. Robot assembly i. Primary Robot

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1. INTRODUCTION This Eurobot project is Year 2 design project which is 90% of the module. This project is aimed to get students to work together in their group and work well as a team, as well as develop a better understanding on programming and designing a robot that is able to carry out certain tasks. This project will further develop the student's skills on Solidworks (CAD), FEA and Arduino.

The Group's Aim The aim of this project i s to produce a well -thought-through and smart robot(s). The robot(s) shoul d be able to perform all four main tasks – collecting blocks, collecting seashells, fishing and closing the hut doors. Also, to include a parasol which will open at the end of each match to earn bonus points. At the same time, the cost of

manufacturing the robot(s) should be under RM400.00 and abide by all the Eurobot Rules. The main aim of the team was to win the Eurobot competition by getting the highest number of points . 

2. CONCEPT DESIGN STUDY AND SELECTION OF FINAL DESIGN How the team prioritised the requirements Based on the project outline and marks distribution, the project requirements were set using the Binary Weighted Matrix (BWM) (Appendix 1.1). This was to ensure the concept design produced was focused on the team’s target and could perform the tasks as expected. The requirements were set by all the team members

and was guided by the marks breakdown in Eurobot Project Outline 16/17. The project requirements:

A morphological chart (Appendix 1.2) was used to g roup all the proposed mechanism performing the same task. Each mechanism for the task was compared directly in terms of innovativeness, robustness, cost and simplicity. From there, one mechanism for each task was to be selected for the final concept design. Then, an initial strategy map was drafted. From the map, it was concluded that one robot would not be able to perform all the tasks within 90 seconds. By referring to TRIZ (Appendix 1.3), a problem-solving tool, the contradiction can be solved by doing segmentation. Therefore, the team decided to have two robots. This enabled the robots to carry out all the tasks in 90 seconds. The next step was to detail out every mechanism selected by listing out the exact components required. By referring to the technical specification of each component, the best components were selected for each mechanism.

The Final Design From the list of mechanisms selected, they were split into two robots. The grouping was done based on the position of the tasks on the map. Since the hut and blocks were nearby, the door pusher, weight mover, shovel and gripper were combined in the primary robot. On the other hand, the fishing area was around the seashells area, so the fishing mechanism and flapper were combined in the secondary robot. Lastly, since the secondary robot has more space available than the primary robot, the parasol mechanism was designed in the secondary robot. Then, the final design of the 2 robots were sketched properly. From the sketching, a detailed CAD drawing of

3. MECHANICAL AND ELECTRICAL SYSTEM Mechanical system Selection of components MOTOR SPG30E

Type

20K

30K

60K

120K

200K

270K

Rated Load Torque (Nm)

0.127

0.177

0.294

0.490

7

14

Rated current (mA)