Method for configuring a digital filter for attenuating a frequency associated with a torsion mode of a power transmission line of a turbine engine
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United States of America
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Feb 11, 2025
Grant Date -
Jul 14, 2022
app pub date -
Apr 6, 2020
filing date -
Apr 6, 2020
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Abstract
A method for parameterizing a digital filter for attenuation of a torsional mode of a power transmission line of an aircraft turbine engine is disclosed. The mode is associated with a frequency in a confidence interval, the digital filter is low-pass and described by a transfer function equal to the quotient N(z)/D(z), integrated into a pre-existing monitoring loop of the turbine engine, to filter signals sampled at a frequency. The method includes: calculating zeros of N(z), so that the filter attenuates the frequency; updating the zeros of N(z), so that the gain of the filter satisfies, in the interval, a first gain template; and determining the poles of D(z), so that, in the bandwidth of the loop: the phase of the filter satisfies a phase template, and the gain of the filter satisfies a second gain template.
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