Jason Jarvinen Thomas Hong Adam Carson
Level 1 (Sponsors): Barbara Rozkowski
Level 2 (Supervisors):
AsPr Ozdemir Gol, Prof Andrew Nafalski
Level 3 (Team Members): Jason Jarvinen, Adam Carson, Thomas Hong
• The Janus Evo is a concept car proposed by Engineering for Humanity, a not for profit organisation run in Adelaide. • Concept of the car based on a micro-car built in 1958 by Zundapp, a German company. • The car was required to be driven electrically.
• The car would be designed and built for the purpose of allowing the elderly and people with disabilities a means to commute. • Environmental impact would also need to be factored in • Main focus of the group to design and build the electrical drive system of the car.
• The initial plan for the project required the build of the motorised wheels of the Janus. • This did not provide a clear set of deliverables for the group. • An amendment to the scope needed to be made that was relevant to both the group and the goal of the project.
• A compromise was made where we would design and build a scale model of the car’s drive system • The system was to be called a mobility platform incorporating drive and steering system for possible implementation in a larger scale.
• The main part of the project is to develop the drive system for the mobility platform • Drive system required to be drive-by-wire • The project team has decided on a single microcontroller controlled brushed DC motor setup with feedback
• Single brushed DC motor drive system with PWM controlled H-bridge
Drive System - Design
• Hall effect sensor used for feedback
Drive System - Concept
• In addition to the drive system is the steering system for the mobility platform. • A stated requirement of the car was to develop a steer-by-wire setup for the system. • The team has decided on a stepper motor controlled rack and pinion steering setup.
Steering System - Design
• Steering wheel and steering components to be connected electronically reducing manual intensive movements of the arms • Steering wheel movement signals sent through A/D conversion to microcontroller • Hybrid bi-polar stepper motor chosen as drive motor for its sensitive control and high torque-to-size ratio
Steering System - Concept
• In order to incorporate both the steering and drive systems a chassis needed to be built. • As electrical engineers, the skill set required was lacking. • Obtained help from a local car restoration workshop Resto Rod Race to build chassis and steering components.
Platform Chassis - Concept
• Small scale testing stage of both drive and steering systems. • Awaiting shipment of motors from Chinese companies with testing and assembly to follow. • Draft sketches and plans of Mobility Platform chassis submitted to Resto Rod Race for approval.
• Engineering for Humanity • ShenZhen Unite Industries
– DC Motor Suppliers
• HeZhong Electric
– Large CNC Stepper Motor Suppliers
• Resto Rod Race – Elizabeth South
– Chassis and Steering