Publications

Complex speed measurement task with individually developed sensors

Speed measurements under difficult environmental conditions: For the case study, the Rotec Engineering team developed a customized miniature sensor for speed recording on the roller tappet and derives recommendations for action using suitable measurement technology and analysis software.

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

Standard NVH analysis systems use airborne and structure-borne sound signals to study the generated noise, vibrations and their transmission paths. They often ignore the mechanism of how these effects are generated. Our case study addresses the questions of how to better investigate noise excitation, where torsional vibrations can become critical as well as dynamic loads, and what parameters should be recorded.

Improved approaches to the measurement and analysis of torsional vibration analysis

A primary goal of NVH engineering is the identificationand control of noise and vibration sources. In recentyears the torsional vibration behaviour of engine and powertrain components has gained in significance. This paper discusses several aspects of measuring and analysing torsional vibration and related data. Several torsional vibration measurement techniques are presented, together with remarks on precautions against possible sources of error, and the order of accuracy to be expected of the test results. Two applications requiring multichannel measurement and analysis are outlined.