Shaker Fixture: Introduction
The fixture is the portion of the overall system whose function is to faithfully transmit the prescribed input from the shaker system into the test article under test. The fixture is everything between the drive coil of the shaker system and the test article under test.
This includes the shaker armature, shaker head, expander head and other fixtures used to mount the test article to the shaker.
Fixture Design Goal
Goal – Minimize the weight of the fixture and keep significant resonances out of the test frequency range
For a MISO test (Multiple Input Single Output = Single shaker test), the expected properties of the fixtures are:
- • infinitely rigid
- • weightless
- • quickly available