Fig. 1. Exitaction state of a BLDC motor: (a) A, B phase are excited, (b) A, C phase are excited.
Fig. 2. Equivalent circuit of a BLDC.
Fig. 4. H∞control optimization configuration: (a) General control configuration, (b) Stability robustness.
Fig. 3. Block diagram of fin position servo system.
Fig. 5. Targeted loop shape of position control.
Fig. 6. Targeted and actual loop shape of position control.
Fig. 7. Closed loop of position control system.
Fig. 9. Simulation of position control response - 65Hz sinusoidal reference input.
TABLE III POSITION CONTROL PERFORMANCE COMPARISON BETWEEN TRANSFER FUNCTION AND SIMULATION BY SINUSOIDAL INPUT AT 65HZ
Fig. 11. 0~15 degree position step response and its input current, PWM output, by designed controller(Experiment).
Fig. 8. Simulation of fin position servo system.
Fig. 12. 0~15 degree position step response and its input current, PWM output, by tunded controller(Experiment).
TABLE I PARAMETER OF THE FIN POSITION SERVO SYSTEM
TABLE II CALCULATED CONTROLLER PARAMETER
Fig. 10. 0~15 degree position step response and its input current, PWM output(Simulation).
TABLE IV 0~15 DEGREE STEP RESPONSE COMPARISON BETWEEN SIMULATION AND EXPERIMENT
TABLE V 0~15 DEGREE STEP RESPONSE COMPARISON BETWEEN DESIGNED CONTROLLER AND TUNED CONTROLLER
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