Using the µ-REMUS software suite extended evaluation procedures may be performed in the field of NVH (Noise, Vibration, Harshness) applications, such as
- mechanical vibrations,
- airborne and solid-borne sound,
- order tracking on rotating machinery,
- effects of mechanical imbalance,
- modal and operating deflection analysis.
µ-REMUS includes the following program modules:
µ-REMUS - Signal Analysis
By means of the µ-REMUS - Signal Analysis program module different types of vibration signal processing can be performed. Time series, FFT spectra, auto- and cross-spectra, transfer and coherence functions can be recorded.
µ-REMUS - Order Analysis
By means of the µ-REMUS - Order Analysis program module acceleration and deceleration runs of rotating machinery may be recorded and analysed. While the test is still running, time series, magnitude spectrum, 3D-waterfall and Campbell diagrams of the order domain spectra can be displayed online. In addition, during offline analysis, order tracking can be performed and frequency (FFT) domain spectra can be displayed (3D-waterfall and Campbell).
µ-REMUS - Modal Analysis and Operating Deflection Analysis
The µ-REMUS - Modal Analysis program module is used for structural analysis of a mechanical system. The geometrical structure of the testing object is to be defined by the input of test-point coordinates as well as connecting lines and surfaces. At first, the recorded signals must be evaluated by means of the µ-REMUS - Signal Analyser. Once the modal parameters (frequencies, decay factors, eigenvalues) have been determined, animated displays for each mode as well as for every single spectral line of the transfer functions are available.
The analysis of operating deflections under structural impact results in the determination of the excitation frequencies and the related structural behaviour. The input of the geometrical structure and the spectral analysis is performed in a similar way as with the Modal Analysis. For every spectral line detectable in the excitation power spectrum the related vibration mode can be displayed in animated form.
For the analysis of operating deflection the vibration signals at the different test-points must be recorded simultaneously. As a result the grid model of the structure may animated by "re-playing" the recorded data, thus enabling a visual examination of the dynamic behaviour.
µ-REMUS - Rigid Body Balancing
A rotor which shows no elastic distortion when running at its operating speed is called a "rigid" rotor. An existing imbalance may cause undesirable or intolerable vibrations. By means of the µ-REMUS - Rigid Body Balancing program module this imbalance can first be examined and then be eliminated thus providing an adequately smooth running behaviour.
µ-REMUS - Dynamic or Elastic Body Balancing (under development)
A rotor which does show an elastic distortion when running at its operating speed is called an "elastic" rotor. An existing imbalance may cause undesirable or intolerable vibrations. By means of the µ-REMUS - Elastic Body Balancing program module this imbalance can first be examined and then be eliminated thus providing an adequately smooth running behaviour.
µ-REMUS - Robot Controlled Sound Intensity Measurement
Any working machinery causes noise which may be undesirable or intolerable. By means of the µ-REMUS - Sound Intensity program module the occurring sound emission can be analysed. A robot control may be used to enable automatic scanning of the pre-defined sound field.
µ-REMUS - Pass-by Noise Measurement (ISO 362)
By means of this module the sound emission of a passing road vehicle can be determined according to the procedures defined in DIN EN ISO 362.