subject: The Random Vibration Phenomenon [print this page] When you hear the word random you cannot think of something in particular. It is this feeling which makes randomness random. But when it comes to random vibration, it is a whole new concept. A vibration is when oscillations occur about an equilibrium point. It is classified into periodic and random vibration. Random vibrations, in terms of mechanical engineering, are vibrations which are unstable, cannot be determined and whose future cannot be predicted. Since a random vibration is mostly an output of excitation, it is undesirable. A common example of it is a truck driving on a rough road. It not only wobbles on the road but also makes the journey uncomfortable.
Testing a device for random vibrations created by its mechanical parts can help in identifying any failures or weaknesses in the hardware used so that it can be rectified before launching the device. Because of technological advances and in depth research in the field of vibration testing several products that are capable of determining and measuring the random vibrations are available today. These products not only help you in understanding the weaknesses in your hardware but also help you in improving the quality of your device. The testing of a device like an aircraft for Random Vibrations is extremely important to avoid uncalled for accidents and problems. To minimize damage, vibration controllers are put to use.
Real Vibration controllers are devices which generate and control these unwanted vibrations to which your device is subjected. This is to ensure that your device hardware is safe and functions without any problems. They are based on creating and controlling the Gaussian random vibrations from a user-defined Power Spectral Density Function. Such controllers are not only easy to use but also has a very superior frequency resolution along with uninterrupted data capture of the feedback signals and has a total of six response channels, making it a flawless system.
Generally, these controllers are used in a lab and are pre-programmed with standard functions. They are equipped with vibration shakers, one or two in number configured individually. They also have a software or hardware package which can be connected to any standard Random Vibration testing equipment. Mostly this controller software is easy to use and convenient. The entire information that is obtained through these controllers is the real-time test information which is a combination of feedback and additional response signals, statistical functions and other important parameters.
The performance of a random vibration controller is reliable and qualitative thanks to the National Instruments Hardware which is recognized all over the world. Add-on modules can further enhance the performance of these controllers. Since the data capture is continuous, it can be stored into a disk or a storage device through any of the multiple input channels.
Thanks to the advancement in technology, today random vibrations cannot recreate ruckus in anyway because hardware is put through stringent tests to determine its durability and potential to function efficiently.
