Robust controller design for network-based PMSM servo systems with transmission delay

In industry applications, the remote Permanent Magnet Synchronous Motor (PMSM) can close its control loop via a digital network to reduce the cost and simplify the installation. However, the uncertain network-induced delay could degrade its performance. Considering the detrimental effects of delays in the communication network, we establish the model of Network-based PMSM servo system. Then sufficient conditions for the stability of the system is given. Based on these conditions, we propose a method to design a stable state feedback controller, which is robust against the transmission delay. Simulations were done to verify the correctness and effectiveness of the proposed controller design method.