Review of Recent Developments in Multiple Reference Impact Testing (MRIT)

Abstract

Impact testing was one of the first practical applications of the Fast Fourier Transform (FFT) technique in the late 60s. Prior to the development of the FFT, measuring the Frequency Response Function (FRF) was limited to sinusoidal testing procedures. The sine testing methods were slow, and required elaborate fixtures for excitation (electro-mechanical or hydraulic exciters). Impact testing had an order of magnitude faster test time and minimal fixtures. As a result, it became a very good field testing and trouble shooting method, as well as a pretesting method for controlled laboratory testing. In this paper a general review of the evolution of impact testing from its development in the 60s and 70s to the present time, with a more extensive review of recent developments in testing procedures and parameter estimation for Multiple Reference Impact Testing (MRIT).KeywordsSingular Value DecompositionFrequency Response FunctionModal ModelStatic DeflectionModal Assurance CriterionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.