Impact hammer
Meggitt Sensing Systems - Measurement Group

Endevco modal impact hammers feature an ISOTRON® impedance converter that provides an IEPE-type output, compatible with most FFT analyzers and data acquisition systems, and are designed to properly excite structures in modal and structural analysis applications.

Use of modal impact hammers can be a portable and cost-effective means of providing controlled excitation to structures, while providing no undesirable mass loading to the structure under test. Scaled modal models also require precise force measurement, which can be achieved via a modal hammer fitted with a piezoelectric force transducer. In applications where a high crest factor and ability to shape the input force spectrum is of minimal concern, impact hammers are an ideal source of excitation. Endevco® modal hammers are designed to excite the test structure with a constant force over a frequency range of interest. In addition, certain selected models are acceleration compensated, to avoid spectrum glitches due to hammer structural resonances.