Research Article
Sliding Mode Disturbance Observer-Based Fractional Second-Order Nonsingular Terminal Sliding Mode Control for PMSM Position Regulation System
Figure 7
SMDO-based F2NTSMC for the system with . (a) Position tracking performance, (b) tracking errors, (c) sliding surfaces, (d) control inputs, (e) current , and (f) lumped disturbances and their estimation values.
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