【摘要】 针对桥式吊车(桥式起重机)的常规使用场所,设计了通用性较强的自动定位程序控制系统。通过光电开关检测吊车位置并对吊车大厅分区,以可编程控制器(PLC)和变频器作控制器件,采用定时运行的方式实现吊车的自动定位控制。定位误差小于2.1 cm,吊运物摆幅小于5.7 cm,吊车运行的平均速度大于额定速度的90%。本文重点介绍吊车的位置、运行方向、运行速度及定时起点的确定和编程控制,并对自动定位的性能指标进行了定量分析。更多还原

【Abstract】 This automatic positioning system is designed for the crane which is in common use. The crane hall is cut into several parts, the position is detected by the photoelectric switches, and the PLC and inverter are used for the control devices. The automatic positioning control of the crane is completed by means of the timing movement. The positioning error is less than 2.1cm, the swing range when lifting object is less than 5.7cm, and the average speed of the crane is more than 90% of the rated speed. This paper gives further description in the positioning control, direction control, speed control and the identification of the starting point. Finally it gives an analysis of the automatic positioning performance.更多还原