SLIDING MODE CONTROL SYSTEM INCLUDING FEEDBACK OF AMOUNT OF TWIST.

摘要

A sliding mode control system including feedback of an amount of twist for controlling a servo loop, which comprises the steps of reading (SP1) of the positions of a servo motor and a mechanical operation portion driven by the servo motor, calculation (SP2) of an amount of twist as an error quantity, calculation (SP3) of a switch surface Suf from a value obtained by filtering the amount of twist, and selection (SP4, SP5 and SP6) of a switch input by this value to make sliding mode control. The amount of twist is filtered with a factor involving linear numerator and denominator. This filter serves to realize a system which has less vibration and is robust to inertia fluctuation.