BTT Spinning Rig update

The BTT spinning rig has been adapted to allow the investigation of axial movement measurement and to produce data sets that will allow surge deflection algorithms to be validated.

A reference disk and a new high speed motor enable us to precisely measure the axial movement of a spring loaded rotor that is used to create axial position shifts with increasing load.  The motor rating has been increased to 500W and the maximum speed is now 3000 rpm.

A new video has been added. Validation of axial position algorithms can be performed using our modified spinning rig with a spring loaded fan that allows
axial shift with increasing fan load.  The axial movement is acquired accurately from the rotor using optical techniques and this can then be compared to that calculated form the tip timing probes.

This allows us to improve the accuracy and resolution of our methods