We also design and manufacture the LDS range of vibration test
Team, today part of the Noise and Vibration Technologies Group, was working on a different type of orthogonal 6DOF concept before March, 2005, the date of the company's patent US 6,860,152, "High Frequency Multiple Degree of Freedom Vibration Test
Machine." The configuration described in the patent used only six actuators but opposed the horizontal shakers with fixed preload pistons.
On Tuesday, NASA announced that it had since carried out three low-level vibration tests
of the telescope - currently housed in a clean room at the Goddard Space Flight Center in Greenbelt, Maryland - and was now close to determining the cause of the anomaly.
The functional test results prior to a sine burst test, random vibration test
, and shock test to check the structural safety of the mechanism in a launch environment were compared with the functions after the launch environment test.
Processing of Ambient Vibration Test
Data and Results
Finally, start the actuator, by adjusting the excitation amplitude and excitation frequency of actuating device, to simulate parametric vibration problem of cable under the excitation of bridge bearings; site layout photos of cable parametric vibration test
under bearing excitation are shown in Figure 4.
Development of MDOF specific reference criteria and the inclusion of the MDOF criteria in military specifications are essential to the accuracy of an MDOF vibration test
. As expected, this element of the MDOF vibration test
lags behind the development of the laboratory test technology, but likely will see increased near-term activity.
In line with all-Union State Standard it is available to replace random probability vibration test
by equivalent sine wave vibration.
The vibration test
measured the plane's flexibility.
These including a parabolic flight test to its behaviour in zero G conditions and a vibration test
to make sure it was strong enough to withstand the launch.