Design And Fabrication Of A Reduced Scale Tire Test Machine

Kong, Wei Shen (2013) Design And Fabrication Of A Reduced Scale Tire Test Machine. Project Report. UTeM, Melaka. (Submitted)

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Abstract

It is important to study forces developed by the tire to understand the dynamic behavior of the vehicle which reflect multiple events that occur under real driving condition. The generation of these tire forces based on the longitudinal slip ratio and tire slip angle input is studied. Besides, the full scale tire test apparatus and the advantages of reduce scale machine is studied. This project is focus on development of a reduce scale tire test machine which able to determine the tire longitudinal stiffness and cornering stiffness of a one to fifth scale remote control vehicle. To develop this machine, multiple conceptual designs have generated and the most appropriate design is selected by using weight decision matrix method. Based on the selected design, detail design included bill of mechanical component and bill of electrical component which determined the specific function of every component to carry out specifies task. Reduce scale tire test machine build up from simple mechanism which used a DC motor to stimulate a drum to rotate the tire in stationary position, angular encoder to measure tire rotational speed, a stepper motor to provide wheel steer angle, prony brake used to obtain reaction force generate by tire at longitudinal and strain gauge used to measure lateral direction. Stress analysis is done on the machine structural frame to avoid structural failure. Dugoff tire model is developed to provide tire longitudinal and cornering stiffness information. Functional test is important to ensure tire test machine can work properly and able to determine the tire longitudinal and cornering stiffness which enable the researchers and engineer to investigate reduce scaled tire characteristic.

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