Anti-disturbance Pseudo Derivative Feedback Strategy for Motor Control Based on a Load Observer

To further improve the anti-load disturbance ability of motor control based on pseudo derivative feedback (PDF) strategy, we embed a reduced-order load torque observer into a PDF strategy control system. Using the measured rotor angle as the known parameter, a reduced-order load torque observer is designed. A control law, governing the embedding of the reduced-order load torque observer into the PDF strategy motor system, is deduced. It results in the development of an anti-disturbance PDF strategy motor control system with better anti-load disturbance ability. In order to verify the anti-load disturbance ability of the new PDF strategy motor control system, a practical case study is used to establish the simulation model. The simulation results reveal that the PDF strategy motor control system with a reduced-order load torque observer has a better anti-load disturbance ability than an ordinary PDF strategy motor control system.