Abstract
In this paper, an intelligent fractional-order integral sliding mode control (FOISMC) strategy based on an improved cascade observer is proposed. First, an FOISMC strategy is designed to control a permanent magnet synchronous motor. It has good tracking performance, is strongly robust, and can effectively reduce chattering. The proposed FOISMC strategy associates strong points of the integral action (which can eliminate steady-state tracking errors) and the fractional calculus (which is flexible). Second, an improved cascade observer is proposed to detect the rotor information with a smaller observation error. The proposed observer combines an adaptive sliding mode observer and an extended high-gain observer. In addition, an improved variable-speed grey wolf optimization algorithm is designed to enhance controller parameters. The effectiveness of the strategy is tested using simulations and an experiment involving model uncertainty and external disturbance.
摘要
提出一种基于改进级联观测器的智能分数阶积分滑模控制 (FOISMC)策略. 首先, 针对永磁同步电机设计了分数阶积分滑模控制器, 该控制器有良好跟踪性能, 具有强鲁棒性, 且能有效削弱抖振. 所提策略结合了积分能消除稳态跟踪误差和分数阶微积分灵活的优点. 其次, 提出一种改进的级联观测器, 能获得较小的转子信息观测误差. 所设计级联观测器结合了自适应滑模观测器和扩展高增益观测器. 此外, 利用改进的变速灰狼优化算法优化控制器参数. 最后, 在综合考虑模型不确定性和外部干扰的情况下, 通过仿真和实验验证了所提策略的有效性.
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Lingfei XIAO and Leiming MA designed the research. Leiming MA drafted the paper. Xinhao HUANG helped organize the paper and polished the English. Lingfei XIAO and Leiming MA revised and finalized the paper.
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Lingfei XIAO, Leiming MA, and Xinhao HUANG declare that they have no conflict of interest.
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Project supported by the National Natural Science Foundation of China (No. 51876089) and the Open Foundation of the State Key Laboratory of Fluid Power and Mechatronic Systems, China (No. GZKF-202005)
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Xiao, L., Ma, L. & Huang, X. Intelligent fractional-order integral sliding mode control for PMSM based on an improved cascade observer. Front Inform Technol Electron Eng 23, 328–338 (2022). https://doi.org/10.1631/FITEE.2000317
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DOI: https://doi.org/10.1631/FITEE.2000317
Key words
- Permanent magnet synchronous motor
- Fractional-order integral sliding mode
- Optimization algorithm
- Sensorless control
- Observer