Research Article
A Novel Model-Free Intelligent Proportional-Integral Supertwisting Nonlinear Fractional-Order Sliding Mode Control of PMSM Speed Regulation System
Figure 7
(a) Maximum absolute errors under the traditional MF-iPI-SMC, the MF-iPI-FOSMC, the MF-iPI-NLFOSMC, and the MF-iPI-ST-NLFOSMC with load. (b) Root-mean-square errors under the traditional MF-iPI-SMC, the MF-iPI-FOSMC, the MF-iPI-NLFOSMC, and the MF-iPI-ST-NLFOSMC with load.
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