Base Input & Applied Force Calculations

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Consider a single-degree-of-freedom (SDOF) system subjected to base excitation.

There are certain cases where the response of a system is known, but the base input acceleration is unknown. An example would be a seismic sensor which behaved as an SDOF system. The seismometer data would give the acceleration of the mass. A calculation would then be needed to determine the base input which drove the mass to the measured response. This calculation process is a form of deconvolution.

I have written a paper:

A Digital Recursive Filtering Method for Calculating the Base Input for a Measured Response Acceleration

The paper is posted at:  DRFR_base_accel.pdf

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A similar paper is:

A Digital Recursive Filtering Method for Calculating the Applied Force for a Measured Response Acceleration

Posted at:  DRFR_applied_force.pdf

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– Tom Irvine

1 thought on “Base Input & Applied Force Calculations”

  1. Hello Tom,
    May or may not be related. We had a discussion here in regards to the use of test fixtures. Can the same fixtures be used for shock and vibration testing. -Pedro

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