Modal Analysis Module

Modal analysis tools for mode fitting and modal parameter extraction.

modal

Created on Mon Aug 19 17:29:30 2019

@author: tb267

Attributes

MESSAGE module-attribute

MESSAGE = ''

Functions:

f_3dB

f_3dB(f, G0)

modal_fit_single_channel

modal_fit_single_channel(tf_data, freq_range=None, channel=0, measurement_type='acc')

Fit modal parameters for a single mode to data within specified freq_range

f_TF

f_TF(x, f, measurement_type)

f_residual

f_residual(x, f, G0, measurement_type)

f_TF_all_channels

f_TF_all_channels(x, f, measurement_type)

f_residual_all_channels

f_residual_all_channels(x, f, G0, measurement_type)

modal_fit_all_channels

modal_fit_all_channels(tf_data_list, freq_range=None, measurement_type='acc')

Fit modal parameters for a single mode to data within specified freq_range.

Assumes all tf_data in tf_data_list have same frequency axes

unpack

unpack(x)

unpack_matrix

unpack_matrix(X)

pack

pack(fn, zn, an, pn, rk, rm)

reconstruct_transfer_function

reconstruct_transfer_function(modal_data, f, measurement_type='acc')

Reconstructs transfer functions from modal_data and returns TfData object. Includes the per-channel local residual terms (rk, rm). Does not modify modal_data.

reconstruct_transfer_function_global

reconstruct_transfer_function_global(modal_data, f, measurement_type='acc')

Reconstructs transfer functions from modal_data and returns TfData object. Excludes the per-channel local residual terms (rk, rm) — only the modal contributions are summed, as wanted for global fits. Does not modify modal_data.