Abstract:
To achieve ideal speed regulation accuracy and moment of inertia in a phased array radar servo system, a dual-motor drive approach is typically adopted. However, if the two motors fail to achieve coordinated control, the operational efficiency of the phased array radar servo system may be reduced. For this reason, a coordinated control scheme for dual-motor drive in phased array radar servos with load torque compensation is studied in this paper. The dual-motor drive mechanism of the phased array radar servo is established, and the system′s dynamic equations and state equations are derived, with backlash and tracking errors analyzed. By integrating the principles of azimuth single-speed loop control, pitch active drive control, and a torque feedforward control strategy, a dual-motor drive controller for the phased array radar servo with a torque feedforward loop is developed. Load torque compensation is used to eliminate backlash between the two motors, resulting in the output of unidirectional torque. Comparative experimental tests demonstrate that the proposed method not only enables the two motors to output unidirectional torque but also maintains tracking errors within ±0.2 rad, thereby achieving coordinated control of the two motors.