负载力矩补偿下相控阵雷达伺服双电机驱动协同控制

    Collaborative Control of Dual-motor Drive in Phased Array Radar Servo System under Load Torque Compensation

    • 摘要: 为在相控阵雷达伺服系统中取得理想的调速精度和转动惯量,通常会采用双电机驱动的方式,但如果两台电机无法实现协同控制,反而会降低相控阵雷达伺服系统的工作效率。为此,文中研究了负载力矩补偿下相控阵雷达伺服双电机驱动协同控制方案,建立相控阵雷达伺服双电机驱动机构,得到系统的动力学方程和状态方程,分析了齿隙和跟踪误差;将方位单速度回路控制原理、俯仰主动驱动控制原理与力矩前馈控制策略相结合,设计带有力矩前馈环的相控阵雷达伺服双电机驱动控制器,通过负载力矩补偿消除两台电机间的齿隙,输出得到了同向转矩。经过对比实验测试可知,所提方法可以实现两台电机输出同向转矩,还可以使跟踪误差保持在±0.2 rad内,实现了对两台电机的协同控制。

       

      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.

       

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