2012, Volume 7, Issue 1
Frontiers of Mechanical Engineering >> 2012, Volume 7, Issue 1 doi: 10.1007/s11465-012-0311-x
A novel energy loss model and optimization design of the coin chute flection curve
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Abstract
In this paper, we propose a novel design model based on the energy loss of the coin (ELM model) to optimize the flection curve, which is widely used in coin operated machines. Two different kinds of energy loss models are analyzed according to dynamic characteristics of the coin falling movement. The flection curve is constructed based on cubic quasi-uniform B-spline with the data points and end points derivatives as inputs, and the curve model is governed and affected by energy loss equations, allowing to minimize the total energy loss before the coin arrives at the detecting position, thus to reduce the energy loss and collisions between the coin and the flection, thus to improve the testing accuracy. A case study with a typical Chinese currency coin shows the effectiveness of the model using GA optimization toolbox.
Keywords
flection curve ; B-spline ; energy loss model (ELM model) ; optimization design
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