구성 모듈


  • State of the art Signal processing complies with high standard requirements.
    – Needed processing on spectra and waveform, identification, filtering, checking waveform signal, statistics processing
  • Rotating machines analysis dedicated
    – Vibration analysis & spectrum, frequency analysis
  • Acoustic test, Sine vibrations, Random vibrations & Vibroacoustics
    – Narrow band 1/3 Octave, harmonic, FFT, PSD, ESD, modal, RRS
  • Shock analysis
    – SRS, FFT, Fourier spectrum
  • Test tailoring module
    – Random test spec. define, fatigue & damage spectrum processing
  • Thermal analysis
    – Real-time monitoring & processing
  • Oscilloscope signal
    – Manage and processing (FFT)


Analysis Tools


Statistics

  • normal distribution
  • log-normal distribution
  • Gaussian distribution
  • histogram
  • median distribution
  • RMS value of signal
  • Poisson distribution
  • rainflow-counting method
  • skewness
  • kurtosis
  • Weibull probability density
  • probability distribution
  • standard deviation

Signal Processing 

  • discrete Fourier Transform of signal
  • FFT(Cooley-Tuckey method)
  • spectrum shift
  • PSD
  • harmonic spectrum
  • Hilbert transform
  • inverse FFT
  • RMS caculation
  • sine signal processing
  • random signal processing
  • acoustric signal processing
  • transient signal processing
  • waveform synthesis
  • partial coherence matrix
  • Fourier spectrum
  • spectrum conversion : PSD, ESD
  • vibration signal processing  
  • filtering signal
  • Time-Frequency analysis  

Test Tailoring Tool 

  • random test Spec. define
  • MIL-STD-810-D/E/F and GAM-EG-13, AFNOR X50 -144-1 to 6 leaflets standard
  • material and structure characteristics
  • fatigue and damage spectrum
  • extreme response, maximax spectrum parameters  
  • fatigue and damage calculation method on DSP 
  • aeronautic
  • transpotation, energy

Acoustic Test 

  • linear interpolation of spectral band
  • frequency diagram
  • A,B,C,D,E acoustic filtering
  • switching narrow band to wide band spectra
  • cumulated acoustic spectrum
  • acoustic field transposition model: ARP860, Sutherland
  • PSD
  • convert dB to Noys
  • normalized acoustic spectrum
  • RMS spectrum
  • global RMS value
  • Fourier spectrum
  • third of octave spectrum from narrow band
  • Tones separation
  • engine order conversion

Sine Vibrations  

  • discrete Fourier Transform of signal
  • idendification using Prony method
  • synthesis of waveform response from modal characteristics
  • sine signal truncation
  • harmonic frequency response function
  • Fourier spectrum

Random Vibrations 

  • power spectral density
  • energy spectrum density
  • Fourier transform
  • Fourier spectrum
  • transfer function
  • random response spectrum
  • RMS value of vibration signal
  • gaussian distribution

Shock Analysis 

  • FFT
  • inverse FFT
  • SRS
  • inverse SRS
  • Fourier spectrum
  • response filter
  • compensation of signal of shaker shock
  • Pierson criterion

Rotating Machines 

  • tracks frequencies
  • global spectrum
  • overall level processing on segmented waveform
  • order tracking
  • segmentation
  • engine rating tachometric signal
  • threshold Cambell diagram
  • conversion between time segment and rating value

Thermal Testing 

  • signal calibration
  • real-time mornitoring
  • alarm tool function

Oscilloscope Signal 

  • signal processing & management