Abstract

When a suction cup is attached to a surface, air inflow happens inevitably which affects the safety of the application using the suction cup. Therefore, the prediction of suction cup's negative pressure decrement is important for enhancing safety of attachment. This study proposes a prediction method of negative pressure decrement in the attached state of the suction cup. It does not require previous measurement data of the relationship between negative pressure of suction cup and air inflow speed to suction cup. The unknown air inflow speed is estimated by polynomial approximation. The proposed estimation method is applied to a suction cup, and estimation results are verified with experiment.

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