Question

A cam operated machine has a non-constant torque demand as its shaft is rotated at 392 rpm. The torque profile is triangular. The torque first rises at 0 radians to a peak of 168Nm then back down to zero torque (where it remains until the cycle starts again) at 2.793 radians. It is desired to keep the rotational speed within 1% of the nominal speed. Assuming that a motor is sized to provide the average toque needed, what sized flywheel (kg m2) is needed to ensure that the speed fluctuation is no greater than what is desired? 2% error is allowed in the answer. Round to 1 decimal place.

Answer 1

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