摘要
文章针对横向磁场永磁电机非线性、强耦合的特点以及传统PI调节器存在超调和控制参数无法自适应的缺陷,提出一种基于BP神经网络的横向磁场永磁电机PI控制方案。该方案在分析电机矢量控制的基础上,建立了四相横向磁场永磁电机的数学模型,利用BP神经网络对PI调节器参数进行在线整定,通过自调整学习速率改进BP神经网络学习能力,实现电机跟踪性能和抗负载扰动性能的提高。实验结果表明,所采用的控制策略可行,在参数突变和突加负载时,均能够达到跟踪额定转速的效果,使系统具有良好的鲁棒性。
Aim. The introduction of the full paper reviews some papers in the open literature and then proposes the novel and better design mentioned in the title. Sections 1 through 4 explain our design and its evaluation. Section 1 briefs the TFPM mathematical model. Fig. 2 in section 2 is a schematic showing the structure of TFPM control system structure. In section 3, eq. （4） gives the PI （proportional integral） basic control algorithm. Section 4, utili- zing formulas mentioned in section 3, gives simulation PI speed control response curves in Figs. 6 through 9. The core of sections 1 through 4, stated in a different way, consists of： （1） Fig. 3 in section 3 is a schematic demonstrating the BP （backward propagation） network topology structure, and then eq. （8） is used in forward algorithm of BP neural network to ensure the exact neural point number of hide level; （2） eq. （14） is introduced in reverse algorithm to accelerate the convergence rate and improve the anti-interference performance of PI adjuster; （3） Table 1 in subsection 3.3 indicates the initial weighted value of the whole BP neural network; （4） simulation results show preliminarily that the proposed strategy not only makes the motor track the scheduled speed well when the load is suddenly added on but also strengthens the systemg robustness.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2011年第5期824-828,共5页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金(50275125)
陕西省科学研究发展计划(2009K9-16)资助
关键词
横向磁场永磁电机
PI调节器
BP神经网络
矢量控制
proportional control systems, DC motors, PM ）, PI （ proportional integral） adjuster, evaluation, transverse flux permanent-magnet motor （TFBP （backward propagation） neural network, vector control
