Aurora-Torsion is part of the Aurora Analysis system, an integrated analysis platform that provides all the tools and capabilities required for summary and detailed analysis of both time and frequency domain data from a single application window.
The Aurora-Torsion application processes pulse event data from probes either end of the engine shaft, using the difference in time of arrival of pulses to calculate the twist of the shaft. Calibrated Torsion processed files are generated which can be viewed and interrogated in the Aurora-RawViewer module.
The Aurora-Torsion application allows the user to submit torsion processing requests which are performed by the Aurora-Torsion Server.
The user can select to calculate torque as well as twist during the processing. If this option is selected, more information must be provided including various material properties of the shaft.
Characterisation of the channel data for pulse identification/numbering is used within the system to reference the Twist/Phase for a selection of manoeuvres in an engine run to a common zero. The aim of characterisation for pulse identification is to allow the user to process a range of manoeuvres in a period of engine running in such a manner as to be able to stitch the results together without having to make any assumptions about the change in Twist between each manoeuvre.
Once the processed Torsion file has been produced, the user can view and interact with both the Raw and Processed data in the Aurora-RawViewer module. Within this module the user can view the Torsion data superimposed over the Raw data in an Amplitude vs. Time plot.
The FFT Auxiliary plot option allows the user to perform an FFT on the phase and torque data. The FFT Analysis is performed by re-sampling the Phase and Torque data to generate sample points that are equally spaced in the time domain (seconds) rather than in the rotational domain. Once the data has been re-sampled an FFT is performed that produces an X-Axis of Hz rather than Engine Order which is what would be produced if the FFT were to be performed on the original rotational domain data.
The Aurora-RawViewer module offers other features such as data export (in CSV and binary formats), data interrogation, re-plotting the data against speed, as well as flexible and highly configurable chart axes.