Title :
A study of phase/frequency-locked servo system by fuzzy control technique
Author :
Hsieh, G.-C. ; Lee, H.M. ; Chen, L.R. ; Penth, Y.J.
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
Abstract :
A novel fuzzy pulse pump controller (FPPC) is proposed to achieve a fuzzy-control-based phase/frequency-locked servo system (FC-PFLS). Three sets of membership functions are constructed according to the locking performance indexes, position error, discrete time change of position error, and the output crisp value. A set of fuzzy rules is built in the fuzzy-logic controller (FLC) to process the detected position error and provide a suitable pump voltage for the motor drives. The FPPC can fuzzilly provide the motion profiles, such as acceleration, constant, and deceleration for the motor in a fast response without overshoot and with nearly zero steady-state error. The physical model and the linearized model of the presented FC-PFLS are built. A design example of realizing an X-Y mode FC-PFLS is constructed. The experiments of the FC-PFLS comparing with DPPLS and SPSCS are conducted. In comparison with the DPPLS, the acquisition times of the presented FC-PFLS for the short, middle and long distance servos are improved by 30%, 53% and 57%, respectively. For the SPSCS, the acquisition times are improved by 30%, 14%, and the same, respectively
Keywords :
fuzzy control; performance index; phase locked loops; pumps; servomotors; FC-PFLS; FPPC; X-Y mode; discrete time change; fuzzy control technique; fuzzy pulse pump controller; linearized model; locking performance indexes; membership functions; motion profiles; motor drives; phase/frequency-locked servo system; position error; pump voltage; Control systems; Error correction; Frequency; Fuzzy control; Fuzzy sets; Fuzzy systems; Performance analysis; Process control; Servomechanisms; Voltage control;
Conference_Titel :
Systems, Man, and Cybernetics, 1997. Computational Cybernetics and Simulation., 1997 IEEE International Conference on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-4053-1
DOI :
10.1109/ICSMC.1997.638147