Methods for Preventing Stick-Slip

概要

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In this report, methods to restrain stick-slip in a hydraulic driving system are described. The acceleration feedback method is theoretically and experimentally verified to be very effective for the restriction of stick-slip. In addition, the transient velocity feedback method is found as effective as the acceleration feedback and more practical with respect to the drift in an electronic detecting device. In this method, the voltage in proportion to the table velocity is differentiated by a first order lead network and fed back to the servo amplifier. Furthermore, it is shown that self-excited oscillation may take place when the above mentioned feedback compensation is effected, but that this oscillation can be diminished by imposing dither on the servovalve.
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