摘要
针对永磁同步电机运行过程中因模型不确定、参数摄动和外部扰动等因素的影响,从而导致驱动系统性能下降的问题,提出一种新型控制策略。首先,为减少对系统数学模型的依赖,构建了一个新的超局部模型,用于描述永磁同步电机的转速环。其次,基于转速环的新型超局部模型,结合一种新型积分终端滑模面和改进超螺旋控制律来设计新型无模型超螺旋快速积分终端滑模控制器,实现了对转速的精确控制。再次,采用非奇异快速终端滑模面和双幂次趋近律设计改进扩展非奇异终端滑模扰动观测器,通过精确观测和前馈补偿未知扰动,有效地抑制参数摄动和外部扰动,增强了系统鲁棒性,提高系统的动态性能和稳态性能。最后,通过与传统控制方法的仿真和实验对比,证实所提算法转速抗超调能力提升为0.412 5%,转矩快速响应能力提升0.013 s。结果表明当存在未知扰动时,所提方法具有较强的鲁棒性和良好的抗干扰性。
To address the decline in drive system efficacy due to uncertainties in the model,variations in parameters,and interruptions from external sources affecting permanent magnet synchronous motors(PMSMs),a novel control strategy is proposed.First,to reduce the reliance on the system’s mathematical model,a new super-twisting algorithm is formulated for the speed loop of the PMSM.Secondly,based on the new super-twisting model of the speed loop,a novel model-free super-twisting fast integral terminal sliding mode controller(MFSTFITSMC)is designed by integrating a new type of integral terminal sliding surface and an improved super-twisting control law,achieving precise control of the motor speed.Furthermore,a non-singular fast terminal sliding surface and a dual-power approaching law are used to devise an improved extended nonsingular terminal sliding mode disturbance observer(IENTSMDO).This observer accurately detects and provides feedforward compensation for unknown disturbances,effectively suppressing parameter perturbations and external disturbances,thus enhancing the system’s robustness and improving both dynamic and steady-state performances.Finally,through simulation and experimental comparison with traditional control methods,the proposed algorithm has been verified to improve speed overshoot resistance by 0.4125%and enhance the torque response speed by 0.013 s.The results indicate that the proposed method possesses strong robustness and good interference rejection capabilities in the presence of unknown disturbances.
作者
赵凯辉
谯梦洁
吕玉映
游鑫
张昌凡
郑剑
Zhao Kaihui;Qiao Mengjie;Lyu Yuying;You Xin;Zhang Changfan;Zheng Jian(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2024年第5期64-74,共11页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(52172403,62173137,62303178)
湖南省自然科学基金项目(2023JJ50193,2023JJ30214,2023JJ50196)
湖南省教育厅科学研究项目优秀青年项目(22B0577)资助。
关键词
永磁同步电机
无模型超螺旋快速积分终端滑模控制器
扩展非奇异终端滑模扰动观测器
permanent magnet synchronous motor
model-free super-twisting fast integral terminal sliding mode controller
improved extended nonsingular terminal sliding mode disturbance observer
