Brushless dc motor controller with both ac motor controller of simple structure, reliable operation, easy maintenance and a series of advantages, and has the dc motor controller running with high efficiency, no excitation loss and speed performance is good, and many other advantages, so its application scope and widely, in the defense, aerospace, medical equipment, household appliances, robots and other fields, including photoelectric position tracking system is one of the important application field. Traditional PID control cum suis proprietatibus boni realis-vicis, et facile ad animadverto late in potestate in potestate, ut dum ius ad parametri et nonlinear accusatus est ad consequi et ratio parametri sunt fortis incerta, magis est ritus et nonlinear in Rotherer, et Ratio Motorer Ratio sunt Certe Motorer et Ratio Motorer et Ratio Motorer sunt Ratio Motorer et Ratio Motorer sunt Ratio Motorer, Motorer Motorer et Ratio Motorer et Ratio Motorer et Ratio Motorer et Ratio Motorer, Motorer Motorer et Ratio Motorer et Ratio Motorer et Ratio Motorer et Ratio Motorer, Motorer Motorer et Ratio Motorer et Ratio Motorer et Ratio Motorer, Motorer Motorer et Ratio Motorer et Ratio Motorer et Motorer et Ratio Motorer Ratio Motorer, Motorer et Ratio Motor Tempus-vario, nonlinear et ratio parametri in PID potestate effectus erit difficile ad consequi expectata metam. Et Fuzzy potestate, nonlinear, vicis-vario, etc ex contrariis obiecti cum fortis facultatem ad aptet, et flexibilitate et bonam robur, et simplex imperium, quod est difficile in agro motricium, potestatem, non est idealis. Through simulation analysis can be seen that the fuzzy controller to system deviation and the deviation change rate as input, with similar conventional proportionalDifferential effect, can obtain good dynamic characteristics, but its stability cannot achieve satisfactory effect. Proportion link in PID controller improves dynamic response, integral element can eliminate static error, differential link can speed up the system response, less overshoot, the fuzzy PID controller, the fuzzy control of the advantages of good dynamic performance and steady precision of PID control combined with the advantages of effectively improving the control performance of servo system, the adaptability to disturbance and parameter changes, not only ensure the accuracy Et stabilitatem motus potestate ratio, dynamic temperatio et breviare tempore et Brushless DC motor controller effectum bonum imperium effectus.