The proposed course poses many challenges; as a result, several design parameters for the design of the robot were continuously developed. Several prototypes of the robot were built; each successive prototype was built to rectify any problems encountered by the preceding model.

The simulation of the mechanical system is obtained by using SimMechanics which allows the designer to manipulate design parameters and their effects on the overall assembly. Conceptual design of the robot is further understood through the functional requirements which are derived from the design matrices and design parameters.

The build, design and programming of the Lego robot were successful. The robot performed as required, successfully traveling through the course. Challenges were encountered such as electrical complications (light sensors) and mechanical challenges, in particular when turning. The mechanical challenges caused the robot to slightly deviate from the desired path and increase the time required when turning due to the excessive amount of friction form the equipped wheels.

Reinforcing the rear axis to avoid any deformation of the wheel axis could minimize the turning radius and in return, reduce the time required to complete the turns. More successful and consistent turning may also be achieved by using the tracks as the primary turning mechanism; this would reduce the amount of deformation on the axis and substantially limit the friction encountered between the wheels and the travelling surface; resulting once again in the reduction of the turning radius and turning time.

The most important part of the course was the stair climb and our robot climbed the stairs consistently without a hitch. It also followed the wall consistently at the end of the stairs. The Mecbot followed the black strip every time once actuated as well. The only drawback in the design was the final left turn, which wasn’t perfect and often missed the bumper switch on the Mecbot.

There are no perfect designs and all designs need improvements. In this design, there are several things that could be changed to make the design more efficient. Firstly, the turning took long time compare to travel time and also some of the wheels were dragging. If the robot was all wheel drive with one motor controlling right wheels and another motor controlling left wheels; the turning could have been more efficient as all wheels would be in motion resulting in less drifting. Secondly, the robot fairly long and this required wide turns and also turning took longer. If the robot were more compact, turning would be more accurate, faster, and would also eliminate wide turns.

A technical problems encountered during the project were inconsistency in sensor reading. The reading varied every time under same environmental conditions (i.e. lights off). The reason for being the sensor was too old and was wearing down.

Overall the project was a success as all assigned tasks were completed. There was a lot learned from this project and it helped enhance our technological knowledge and further develop our problem solving skills. In future projects in industry, we would definitely apply the skills acquired in this course. We understand that a thorough design analysis and simulation prior to building a model or prototype is vital in a project as it saves time and money.

Presentation - Free Document Templates

For complete information of the project you can view in docstoc below.

Mechatronics System Design - Free Document Templates