Resources Contact Us Home
Vibration control system

Image Number 6 for United States Patent #5012428.

A vibration control system for generating desired random vibration environment with a given reference Power Spectral Density (P.S.D.) using a vibration generator on which a test object is fixed is disclosed. A detected signal representing vibration of a test object is converted into a response spectrum by Fast Fourier Transform (FFT) and the response spectrum is compared with the reference spectrum to determine a drive spectrum. Random drive signal having the determined drive spectrum amplitude is then generated continuously, and the signal is applied to a vibration generator on which the test object is fixed. This signal must be random i.e. nonperiodic, and therefore consisting of continuous spectral components with sufficient statistical independence. Method and facility to generate above mentioned signal are the principal of the present invention.

  Recently Added Patents
Defect inspection method and device therefor
Memory controller including a hardware compression and decompression engine for managing system memory and graphical operations
Retransmission control method, base station and mobile station
Satellite mounting pole
Semiconductor device and method for manufacturing same
Bit error mitigation
Wireless updating of hearing devices
  Randomly Featured Patents
Cyclic ether derivatives
Container for engine oil
Method for controlling a voltage source converter and a voltage converting apparatus
Method of densifying crosslinked fibers
Heat sink packaging devices
Releasable fastener system
Portable restroom
Air treatment unit providing a filtration system for removing ethylene oxide from a contaminated environment
Fiber-reactive triazine dyes with one AZO chromophore having a vinylsulfonyl type reactive radical and a second chromophore
Body-insertable apparatus