直流力矩电机控制死区的在线检测与补偿  

On-Line Dead-Zone Detection and Compensation For DC Torque Motor Control Systems

作　　者：文彩虹[1] 蒋东方[1] 晁敏[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《测控技术》2010年第4期35-38,42,共5页Measurement & Control Technology

摘　　要：针对直流力矩电机控制系统存在控制信号死区的问题,提出了一种基于软件方式实现该信号死区在线检测和补偿的方法。该方法以增量式光电编码器作为电机转速检测传感器,采用软件手段设计出与硬件一样可靠的编码器旋转速度和方向判读功能,使其能够完成在0值附近对电机低转速的准确检测,再通过逐次增大控制信号的方法试探,检测出直流力矩电机在正、反两个转速方向开始转动时的最小控制信号。这两个阈值之间的控制信号范围就是系统的控制死区。确定性的控制死区可以被数字控制系统有效补偿,并给出了详细的补偿方法。To solve the dead-zone problem existing in DC torque motor control system,an on-line software method to detect and compensate the zone is proposed.An incremental photo-electric encoder is adopted as the sensor to detect the motor rotate speed.A software method is introduced to build the encoder interface as reliable as a hardware encoder interface and to readout the near 0 low value rotate speed accurately.By trying to increase or decrease control signal step by step and monitoring the motor rotate speed at the meantime,two values of control signal corresponded to the threshold can be measured when the motor starts to rotate,from which the control system＇s dead-zone is deduced.A definite dead-zone can be precisely compensated by a digital control system,which is also discussed in detail.

关 键 词：电机控制 死区补偿 转速测量 直流力矩电机 光电编码器 

分 类 号：TM359.6[电气工程—电机] TP212[自动化与计算机技术—检测技术与自动化装置]