Robust Control Strategy for the Speed Control of Brushless DC Motor

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Brushless DC motor ( BLDCM) speed servo system is multivariable，nonlinear and strong coupling．
The parameter variation，the cogging torque and the load disturbance easily influence its performance． Therefore，it is difficult to achieve superior performance by using the conventional PID controller． To solve the deficiency，the paper represents the algorithm of active-disturbance rejection control ( ADRC) based on back