电动舵机双极性控制电流截止负反馈技术

Current Cut-Off Negative Feedback Using in Electromechanical Actuator with Dual Polarity Control

针对电动舵机系统响应速度快、过渡过程中电流冲击大、控制器体积有限的特点,设计了一种基于采样电阻的,用于双极性控制的电流检测电路,给出了采样电阻的选择算法及使用范围。根据直流电动机的双极性控制特点,设计了微控制器的电流采样及软件电流截止负反馈算法。实验表明,该方法能够有效抑制电动舵机过渡过程中的电流冲击,节省硬件电路体积。

According to the characteristics of electromechanical actuator（EMA）system,such as fast response speed,big current shock in transition process,and the limited controller volume,a kind of current testing circuit suit was designed for dual polarity control by using the sampling resistance,and the choice algorithm and using range of sampling resistance were given.Based on the characteristics of dual polarity control of DC motor,the current sampling and software current cut-off negative feedback algorithm for the micro controller were designed.Experiments show that the proposed method can effectively restrain the current shock in transition process and minimize the hardware circuit volume.