Test bench set up for the evaluation of the Static Transmission Error in gearbox

The fulcrum of this thesis is the study of the Static Transmission Error of two meshed gears, in this specific case cylindrical gears, which is the main proponent of the problems related to noise, vibrations and roughness. Starting from the aforementioned premises, in this thesis, a careful analysis on different Static Transmission Error values was obtained through a comparison between the measurements obtained from a previously designed test bench and a dedicated software called GeDy TrAss. First of all it is described what type of phenomenon is the STE, after which the test bench is summarized in all its characteristics describing the improvements made with respect to the first configuration. Considering that the test bench must give truthfulness and act as an experimental counter-test to the GeDy TrAss software, some features are explained in order to better understand how it works. At this point of the work the subject that will be analyzed comes into play, that is a particular example of straight-toothed gears used by NASA in 1996. In order to compare the STE results of the literature with those obtained from the test bench, a MATLAB code is developed to analyze and process all the data collected by the test bench itself. The final part of the work includes the comparison of the results between the test bench, literature and GeDy TrAss software. Based on several tests it is possible to draw conclusions and essentially provide some possible future implementations.