Fuzzy autotuning scheme based on alpha-parameter ultimate sensitivity method for AC speed servo system

This paper presents an advanced method to improve the speed response charac teristics of an ac servo drive system with mechanically resonant loads with out any data-based experiences. Mechanical resonance and antiresonance are both effectively suppressed on the basis of load speed feedback approach fo r the ac servo motion system. A novel ct-parameter ultimate sensitivity met hod is applied to obtain a stable compensation between the proportional plu s integral controller gains and load speed feedback gain. The fuzzy reasoni ng processing for this system is introduced for autotuning of the ct parame ter. The effectiveness of the proposed autotuning control scheme in the ac speed servo system is verified in terms of computer simulation results.