Blade Tip Timing

In the blade tip timing animation, the green line is the actual arrival time for mid-blade edge (blue dot) of a particular blade as measured by a sensor. The red dashed line is the centre-time for a blade passing. The centre time is calculated using the arrival times of all the blades and averaging them over 3 revolutions. The time difference (black arrow) represents the difference between when the blade should pass and when it actually does. Following the blade is a 5E (five cycles / revolution) Sine wave. The difference value is converted into blade deflections and used in the overall blade analysis.