Torsional Vibration Symposium edition:2014 location:Salzburg date:22-23 May 2014
Accurate torsional vibration measurements represent a key aspect for designing more reliable, quiet and efficient rotating machinery. The paper provides a comparison of the main methods (coder-based, laser, accelerometric) and discusses advantages and disadvantages for each technique. The impact of different sources of error on the accuracy is also discussed. Measurement examples are provided for the case of an internal combustion engine. Effects of time accuracy versus spatial accuracy on the overall measurement error are highlighted for the case of a high-resolution measurement of gear transmission error.