Abstract：On the basis of mathematical model analysis of the three-motor synchronous control system, combined with characteristics of active disturbance rejection control theory, a new control method based on second-order active disturbance rejection controller(ADRC) is designed and applied into the synchronous control of three-motor variable frequency speed-regulating system. Three second -order ADRCs are designed for speed control loop and two tension control loops to achieve system dynamic decoupling between speed and tension. In the second-order ADRC, the internal interference in system model, the external disturbance and the coupling effects between speed and tension are made as a total system disturbance by extended state observer, and the extended state observer is used to estimate and compensate the total disturbance of the system. Three experiments of decoupling property, tracking performance and anti-disturbance performance are completed on the platform based on SIMATICS 7-300 power PLC. The results show that second-order ADRC can realize the decoupling control of speed and tension in three-motor synchronous system, improve the anti-interference ability, and make the system has stronger robustness.
[1] Dai Xianzhong, Liu Guohai, Zhang Hao, et al. Neural network inverse synchronous control of two-motor variable frequency speed-regulating system[C].Proceedings of 2006 IEEE International Conference on Networking, Sensing and Control, 2006: 1070-1075. [2] Seung Ho S, Seung Ki S. A new tension controller for continuous strip processing line[J]. IEEE Transactions on Industry Applications, 2000, 36(2): 633- 639. [3] Hearns G, Reeve P, Smith P, et al. Hot strip mill multivariable mass flow control[J]. IEE Proceedings of Control Theory and Application, 2004, 151(4): 386-394. [4] Zhao Dezong, Li Chunwen, Ren Jun. Speed synchronization of multiple induction motors with adjacent cross coupling control[C]. IEEE Conference on Decision and Control, 2009: 6805-6810. [5] 韩京清. 自抗扰控制技术[J].前沿科学, 2007, 1(1): 24-31. Han Jingqing. Auto disturbances rejection control technique[J]. Frontier Science, 2007, 1(1): 24-31. [6] Han Jingqing. From PID to active disturbance rejection control[J].Industrial Electronics, 2009, 56(3): 900 -906. [7] Tian Gang, Gao Zhiqiang. From poncelet’s invariance principle to active disturbance rejection[C]. American Control Conference, 2009: 2451-2457. [8] 周振雄, 曲永印, 杨建东, 等. 采用改型自抗扰控制器的平面磁轴承悬浮控制[J]. 电工技术学报, 2010, 25(6): 31-38. Zhou Zhenxiong, Qu Yongyin, Yang Jiandong, et al. Levitation control of a planar magnetic bearing based on improved ADRC[J]. Transactions of China Electrotechnical Society, 2010, 25(6): 31-38. [9] 韩京清. 由符号函数与绝对值函数派生的非线性函数[J]. 控制工程, 2008, 9(15): 4-6 Han Jingqing. Using sign function and absolute function to construct nonlinear function[J]. Control Engineering of China, 2008, 9(15): 4-6. [10] 韩京清. 扩张状态观测器参数与菲波纳奇数列[J]. 控制工程, 2008, 9(15): 1-3. Han Jingqing. Parameters of the extended state observer and fibonacci sequence[J]. Control Enginee- ring of China, 2008, 9(15): 1-3. [11] 韩京清著. 自抗扰控制技术: 估计补偿不确定因素的控制技术[M]. 北京: 国防工业出版社, 2008. [12] 要晓梅, 王庆林, 韩京清. 大纯滞后纯积分对象的二阶自抗扰控制[J]. 控制工程, 2002, 9(6): 7-9. Yao Xiaomei, Wang Qinglin, Han Jingqing. Two- order ADRC control for integral plants with large time delay[J]. Control Engineering of China, 2002, 9(6): 7-9.
2012, Vol. 27 
