Improved PID Control Strategy for Speed Loop of High Performance AC Servo System and Its Application

With the development of industrial robots, numerical control machines and servo motors, people have more urgent requirements on the control performance and control accuracy of high-performance AC servo system. PID control strategy is extensively used in the speed loop of modern AC servo system. In view of the deficiency of the PID control strategy, this paper improves the speed loop PID control strategy of high performance AC servo system from three aspects: IP control, two-degree-of-freedom control and PID with DOB. Finally, the main servo products of some corporation are analyzed.KeywordsAC servo systemImprove PIDSpeed loopControl strategy