Abstract: The porrameter of rate is very important to evaluate the rate turntable and other inertial navigation test devices with rate function. In view of the inertial testing equipment, the rate test method can't reflect the instantaneous angular rate in the operation of turntable.Based on the analysis of the turn­ table rate fluctuation, butterworth low-pass filter was used in the turntable rate ring. The effectiveness of the filter was demonstrated through MATLAB simulation analysis and table velocity curve drawing.

Key words: Turntable, Instant velocity, Butterworth low-pass filter