Test piece characteristic estimation method and test piece characteristic estimation device
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United States of America
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Mar 31, 2020
Grant Date -
Jan 17, 2019
app pub date -
Dec 13, 2016
filing date -
Dec 13, 2016
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Abstract
A test piece characteristic estimation method includes estimating a moment of inertia of a test piece. A first transfer function G1 from a torque current command for a dynamometer to output from a shaft torque sensor is measured by vibrationally operating the dynamometer. A second transfer function G2 from the torque current command to the output of a dynamo rotation speed sensor is measured by vibrationally operating the dynamometer. A real part and an imaginary part of a ratio obtained by dividing the second transfer function G2 by the first transfer function G1 at a prescribed measurement frequency ωk are calculated. A moment of inertia Jeg and a rotational friction Ceg are estimated by using the real part and the imaginary part of the ratio.
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