Ring-Coupled Nonlinear Adaptive PI Coordinated Control Strategy for Multi-PMSMs with Event-Triggered Mechanism

For multi-permanent magnet synchronous motors (multi-PMSMs) with nonlinearity and uncertainty, an event-triggered nonlinear adaptive PI control is proposed. To enhance the synchronization of multi-PMSMs, a coordinated control strategy is implemented. On the basis of this, a nonlinear adaptive PI control is proposed to address the tracking of the speed of the PMSMs, and the uncertainty signal is estimated by designing an adaptive law. Furthermore, an adaptive event-triggered control mechanism is presented to update control signals in real time, reducing communication resource consumption while maintaining ideal performance. Simulation results on a four-PMSM ring-coupled system demonstrate that the proposed event-triggered mechanism reduces the number of control signal transmissions by up to 92.1% compared with time-triggered sampling, while maintaining comparable control accuracy.