A NEW HYBRID FUZZY PROPORTIONAL-DERIVATIVE PHASE-LOCKED-LOOP CONTROLLER FOR DC SERVOMOTOR SPEED CONTROL

摘要

Some research work has been heading to the promising direction of enhanc ing conventional controllers with various powerful intelligent features. In this pursuit, tin-paper presents a new fuzzy-based phase-locked loop (FPLL) controller for DC servomotor speed control. Fuzzy logic, provides fast response and enhances robustness of the system while PLL control gives excellent, steady state system performance. Unlike the past lit eratures, this fumy-based controller employs a proportional-derivative (FPD) controller, which is constructed precisely baaed on rigorous mathematical analysis instead of using look-up tables, with stability guaranteed. Simulation and experimental results have signified the design objectives and been accomplished. The proposed new fuzzy-based PLL controller gives a better dynamic performance compared to a conventional PID controller.