Mechatronics 5CCE2MCT Individual Coursework Project
Analysis of the AEK Bike Drivetrain
You are a mechatronics design engineer working for Arduino on the new generation of Arduino Engineering Kit Bicycles (rev3). Your team specialises in the procurement and testing of electromechanical components for its production. Your manager has sent you a parametric model of the rev2 version of the bicycle that was developed from a previous project. The model simulateshow the bike moves in response to the actuation of geared DC motor (GM12-N20VA-08225-100-EN) currently shipped with the kit.
Brief
Your manager has asked you to analyse the electromechanical actuation system composed of the geared DC motors that drives the timing belt and pulley train that spins the rear wheel, shown in Figure 1. She provided CAD components and Simulink starter models for the assembly, n.b. these files can be downloaded from the KEATS module page in the MATLAB project archive, bike_rear_motor.mlproj. She has also sent you a list of specifications that she has discussed with the user experience team and has appended to the end of this document. She encourages you to use the model as a starting point and welcomes further input on how to improve the mechanical design.
You are responsible for:
• specifying DC motor, power supply, and gearbox characteristics
• design adigital motor controller to test bike movement
• demonstrate the effectiveness of your design.
You are highly encouraged to brainstorm additional information about the context in which this mechanical system is to be used.
Deliverables
• a 3-minute video recording in which you present the motor and mechanism design to an
engineering design team. The video should contain an animation of the mechanism and an overview of the Simulink model and results.
• a 1-page written report presenting the results of your design analysis with a maximum of 2 page of supporting figures in appendix
• zip and upload Simulink model to KEATs
Figure 1: Bike drivetrain system details, showing (a) bike assembly, (b) drivetrain assembly closeup, and (c) geared DC motor assembly.
Learning objectives
• Model the electromechanical system that actuates the bike using a combination of
mathematical, physical and data-driven methods and critique the choice of your modelling approach
• Specify component parameters based on a design analysis of system requirements
• Implement and tune a feedback controller to control position and speed of the mechanism
• Test the controller design against multiple operating scenarios
• Conduct a design space study tooptimise system-level performance
• Report and justify recommended design implementation