PLC在精密定位伺服系统中的应用参考.doc

编号： 毕业设计(论文) 题 目： PLC在精密定位 伺服系统中的应用 学院： 机电工程学院 专 业： 电气工程及其自动化 学生姓名： 学 号： 指导教师单位： 机电工程学院 姓 名： 职 称： 副 教 授 题目类型：?理论研究 ?实验研究 ?工程设计 ?工程技术研究 ?软件开发 —PLSY指令，它是驱动步进电机的特殊指令。控制过程中，控制输出脉冲频率就能控制步进电机的加速和减速。直线光栅尺的反馈信号是以脉冲形式输出，将其接入PLC的高数计数器，对脉冲进行计数，就知道工作台的位移。 PLC和触摸屏仿真软件的联机调试中，使用触摸屏输入数据后，PLC就能发出脉冲。刚开始脉冲频率由低到高的增加，此过程为步进电机的起步，然后进入工作时的频率，到达位移前，频率递减使步进电机停机，正好到达指定位移。 调试的结果可以证明，本系统的设计是可行的，并且达到了课题的设计要求。 关键词：PLC；触摸屏；步进电机；精密定位 Abstract PLC widely used in industrial control systems, precision positioning servo system is used can make the system more simple, reliable and stable. Mitsubishi FX2N PLC used to simultaneously control two stepper motors to achieve table in the X axis, Y axis linear motion of the plane. Using a touch screen display on the system configuration parameters and state of motion, it more convenient and practical. Through the PLC output signal control pulse signal and the direction of the drive, and then controlled by the stepper motor drive, using the subdivision of the stepper motor is more small step, the control accuracy of 0.001mm. Table displacement measurement with a linear grating and then passed to the PLC, to achieve a closed-loop control. PLC programming with a specific instruction-PLSY pulse output instruction; it is stepper motor driven special instructions. Control process, control the output pulse frequency can control the stepper motor acceleration and deceleration. Linear encoder feedback signals are output as pulse, its access to the high number of PLC counters, pulse count, to know the displacement table. PLC and touch screen emulation software, online debugging, use the touch screen input data, PLC will be able to send pulses. The beginning of the pulse frequency increased from low to high. This process started for the stepper motor, and then enters the frequency of work to reach the displacement of the forme