永磁同步電機交流伺服系統位置環(huán)控制策略研究與實現
[Abstract]:High-performance position servo system is an important prerequisite for automatic equipment to achieve high-precision production and processing. PMSM (permanent Magnet synchronous Motor) (PMSM) has excellent performance combined with the rapid development of power electronics and microelectronic control technology because of its high dynamic performance, high efficiency and lightweight. Ac position servo system based on permanent magnet synchronous motor (PMSM) has become a developing trend of motor servo drive system. The AC position servo system is usually the "three closed loop" structure of the traditional PID regulator control. For the nonlinear control object of PMSM, the traditional PID regulator control is difficult to obtain better control effect. Fuzzy control has the characteristics of independent mathematical model, strong robustness, and can overcome the influence of uncertain factors, such as the variation of system model parameters and the nonlinearity to a great extent. Fuzzy PID controller not only has the precision of traditional PID controller, but also has strong anti-interference ability. In view of the advantages of fuzzy PI controller, the fuzzy PI controller is introduced into the position loop of AC position servo system. The simulation results show that the fuzzy PI controller can achieve accurate position control and improve the speed of positioning. The hardware circuit of AC position servo drive system based on STM32F103 microcontroller is designed, including position signal receiving circuit, inverter bridge circuit, current sampling circuit and so on, and the hardware platform of AC position servo drive system is built. On the basis of the hardware platform, the software of the system is designed, which includes: starting motor, sampling and controlling the current loop, speed loop and position loop, and the realization of SVPWM strategy. Finally, the software program is tested on the hardware platform. The experimental results show that the position loop with fuzzy PI controller can achieve more accurate position control, and compared with the traditional PI control, the positioning speed is better.
【學位授予單位】:西安理工大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM921.541
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