Abstract: The working principle of a centrifugal test bench,which is used to simulate the opening and resetting of the centrifugal limiting block at low or high speed in the rotor hub overhaul and commissioning stage,is described.It is determined that the reason why the rotor hub is opened many times and the reset test still does not meet the technological requirements is that the limit stroke measurement of the centrifugal test bench is inaccurate,which leads to the opening of the centrifugal limit block and the misjudgment of the reset test,which ultimately affects the repair quality and progress of the equipment.In response to this problem,a calibration method for the centrifugal test bench limit travel sensor based on precision laser ranging technology is proposed,which can achieve accurate measurement of the centrifugal test bench limit travel sensor with a measurement accuracy of ±1 μm and a measurement uncertainty of 0.006 μm+1.92 × 10^-5L.

Key words: Rotor hub centrifugal test, Limit travel sensor, Precision laser ranging, Measurement uncertainty