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

This paper presents an advanced method to improve the speed response characteristics of an AC servomotor drive system with mechanically resonant loads without any data-based experiences. Mechanical resonance and antiresonance are both effectively suppressed on the basis of a load speed feedback approach for the AC servo motion system. A novel /spl alpha/-parameter ultimate sensitivity method is applied to obtain a stable compensation between the proportional plus integral controller gains and load speed feedback gain. The fuzzy reasoning processing for this system is introduced for autotuning of the /spl alpha/ parameter. The effectiveness of the proposed autotuning control scheme in the AC speed servo system is verified in terms of computer simulation results.