Movers and shakers: Simultaneous multiaxis testing tops sequential axis methods

摘要

Most engineers would readily agree that "real-world" vibration is likely to be multi-axis. They would also agree that aircraft, missiles, rockets, land vehicles, and ships must simultaneously shake all onboard electronic and other hardware in multiple axes X, Y, and Z. In their own experience driving an automobile or riding in an airplane, bus, or train, they have felt multiaxis inputs. When they are first exposed to military and other vibration test procedures, most engineers are surprised by the ancient laboratory practice of sequential or single-axis-at-a-time shaking (see Sidebar 1).