Wobble Estimation of a Turntable axis by using an Inertial Measurement Unit

A novel method for the characterization of axis wobble in a turntable (motion simulator) is proposed. The procedure relies upon data provided by gyros of an inertial navigation unit mounted on the machine. By eliminating the effects due to gyros biases, Earth rotation and gyros misalignment it is possible to compute the wobble effect as a function of the angular position of the turntable axis. Experimental results are displayed. They show that this method can advantageously replace the classical wobble measurement based on the use of inclinometers.