Empirical compensation of parasitic bearing friction in chain drive dynamometers

Performance of chain drives is of current interest in mechanical systems and bicycles to maximise the useable power delivered to a driven shaft or axle.Such transmissions incur relatively small losses for large transmitted powers, which presents challenges for high accuracy measurement of these losses.This is especially true where high-fidelity emulation of real-world conditions is necessary.A solution for practical measurement of the performance of a chain drive system in such conditions is a Transmitted Power Measurement (TPM) chain drive dynamometer [1] (Fig. 1).