E0 = combustion engine, E1-E3 = electric engine, K = coupling, KW = cardan shaft, AW = drive shaft

Measurements on complete vehicle / VEHICLE DYNAMICS

Problem: Dynamic and acoustic problems, resonances

Goal: Optimal design of the drive train, noise reduction

A holistic view is necessary for the evaluation and optimization of the vehicle. Dynamic effects, acoustic behavior, influences on driving behavior and interactions in the system context should be considered. To be more precise, torsional vibration excitations, mass inertias, stiffnesses and damping behavior of the components play an important role in the dynamic design of the powertrain. They can cause resonances and dynamic problems that affect component life. Another important development objective is noise reduction in clutches, transmissions, and drive shafts. Therefore, an in-depth investigation of the interactions of the individual components is essential.

In the figure, a multi-channel speed measurement using magneto-resistive sensors and laser sensors, for example on cardan shafts (KW), drive shafts (AW), couplings (K0, K1), electric motors (E0-4) and transmissions, in combination with analog measured variables such as accelerations and sound pressure, provides a comprehensive overall picture of the vibration behavior of the powertrain. The recorded measured values are evaluated in the time and spectral domain. The acoustic behaviour is also analyzed.

Furthermore ROTEC ENGINEERING provides you with support and technical engineering know-how for problems related to vibration analysis of engines, transmissions and drive trains. With our know-how, we make a valuable contribution to your product in the areas of timing gear validation, valve train optimization, clutch design, transmission errors (TE), transmission optimization, oil supply optimization, powertrain measurement and optimization, current and voltage analysis, and the application of measurement technology.

Time Domain
Analyses

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  • Dynamic torsional vibrations in gearbox components
  • Analysis of the shaft torsion
  • Impact stress during load change
  • Analysis of the stiffnesses in the drive

Spectral Domain
Analyses

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  • Analysis of dynamic excitations
  • Verification of vibration dampers and coupling systems
  • Resonance behavior
  • Change of natural frequencies over ambient condition
  • Dynamic peak loads

Analyses of the
acoustic behavior

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  • Identification of noise sources
  • Detection of component resonances
  • Specialized software solution for gearbox testing

Associated
Products

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WHERE CAN TORSIONAL VIBRATIONS
BECOME CRITICAL IN THE E-POWERTRAIN?

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