A Novel Tuning Method for PID Controller and Its Application in Permanent Magnet Synchronous Motor Servo Systems

The proportional integral derivative (PI) controller remains the predominant algorithm employed in engineering applications. Nevertheless, existing PI tuning methodologies, whether classical or contemporary, are often characterized by indirectness and limited accuracy or by excessive complexity that hinders practical implementation. Moreover, the influence of the noise filter incorporated within the feedback loop on the closed-loop system performance has not been comprehensively evaluated in these tuning strategies. Consequently, the resulting PI parameters frequently demonstrate suboptimal performance, necessitating empirical on-site adjustments through trial and error. To address these limitations, this study proposes a novel PI controller tuning approach that explicitly integrates the noise filter and directly designs the closed-loop system to meet specified bandwidth criteria. Additionally, the proposed method guarantees the absence of resonance peaks in the closed-loop amplitude frequency response and incorporates considerations of noise attenuation and phase margin. The efficacy and applicability of the method were validated experimentally on a permanent magnet synchronous motor (PMSM) servo system, confirming its practical utility.