They are unique structures with their own mechanical response. Simulate-style fixtures are intended to replicate the actual DUT mounting bracket or mounting surfaces. Generally speaking there are two types of fixtures those that “simulate” the mounting conditions, and those that “stimulate” vibration into the DUT. A fixture is also helpful when the DUT must be held in a particular orientation for all axes of testing and to hold multiple samples for a single test run. The base of the fixture also has attachment points which connect to the vibe/shock machine surface.Ī custom made fixture is especially important for devices that have complex shapes which do not allow for a simple clamping solution. The preferred way is to create a custom assembly, called a "fixture," which provides a mounting surface and tapped holes for holding the Device Under Test (DUT). ![]() The easiest way to fixture is using bars, threaded rods, clamps, or other tools that can grip the test item and secure it to the table. ![]() At Elite, every product tested for vibration or mechanical shock has to be properly secured, or “fixtured,” to a vibration or shock machine.
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