Intelligent control strategies for permanent magnet DC motor drives

This paper presents three effective speed regulation schemes for permanent magnet DC motor drives with a nonlinear load. A feedforward/feedback control strategy is designed for each scheme to ensure effective, high performance tracking of reference speed trajectories. The structure of the feedforward component is the same for each scheme and uses only the online reference speed. All the control strategies utilize the output speed error and its derivative as feedback damping signals. The different feedback controllers used are proportional plus derivative, multi-zonal rule based proportional plus derivative and a fuzzy logic based scheme. The digital simulation and control validation results are presented for both set point tracking and set point plus ramp tracking.