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Technical Paper

A McPherson lightweight suspension arm

2020-04-14
2020-01-0772
The paper deals with the design and manufacturing of a McPherson suspension arm made from PA66 with short glass fiber reinforcement. The design of the arm and the design of the molds have been made jointly. According to Industry 4.0 paradigms, a full digitalization of both the product and process has been performed. Since the mechanical behavior of the suspension arm strongly depends on constraints which are difficult to be modelled, a simpler structure with well-defined mechanical constraints has been developed. By means of such simple structure, the behavior of the material has been highlighted. Since the suspension arm is an hybrid structure, the associated simple structure is hybrid as well, featuring a metal sheet on which plastic is injected. The issues referring to material flow, material to material contact, seams welding, fatigue strength, high and low temperature behavior, creep, dynamic strength have been investigated on the simple structure.
Journal Article

Race Motorcycle Smart Wheel

2015-04-14
2015-01-1520
A wheel able to measure the generalized forces at the hub of a race motorcycle has been developed and used. The wheel has a very limited mass. It is made from magnesium with a special structure to sense the forces and provide the required level of stiffness. The wheel has been tested both indoor for preliminary approval and on the track. The three forces and the three moments acting at the hub can be measured with a resolution of 1N and 0.3Nm respectively. A specifically programmed DSP (Digital Signal Processor) embedded in the sensor allows real-time acquisition and processing of the six signals of forces/torques components. The signals are sent via Bluetooth to an onboard receiver connected to the vehicle CAN (Controller Area Network) bus. Each signal is sampled at 200Hz. The wheel can be used to derive the actual tyre characteristics or to record the loads acting at the hub.
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