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描述了一种阀控马达驱动的水平连铸机微机控制系统.该系统采用速度闭环控制的双拉辊结构,通过试验分别调整两拉辊控制回路的参数,使它们的特性尽可能一致,解决了测速电机本身非线性误差大而又要求同步精度高的技术难题,同步精度达1％.动态特性测试结果表明:系统的频带为7Hz;在水平连铸机工作范围内,其幅相特性完全重合,幅值保持0 dB衰减;相位滞后不超过37°.另外,选用性能优良的位总线(BITBUS)微机,实现了拉坯曲线的产生,拉坯工艺参数的显示、打印、存储,事故处理与报警等功能.文中的定点不定间隔计算拉坯曲线、固定窗内数据比较判断三重点温度随机变化、人工键盘调整拉坯曲线参数以及按时间分时操作多任务等方法简单实用.实际运行证明系统性能稳定可靠。
A valve controlled motor driven horizontal continuous casting machine microcomputer control system is described in this paper.The speed and closed loop control double pull roller structure is adopted.The parameters of the control circuit of the two pull rollers are respectively adjusted through experiments to make their characteristics as same as possible The technical problem that the speed error motor itself has large non-linear errors and requires high synchronization precision is achieved with the synchronization accuracy of 1%. The dynamic characteristics test results show that the frequency band of the system is 7Hz. The amplitude and phase characteristics of the continuous casting machine are completely Coincidence, the amplitude remains 0 dB attenuation; phase lag does not exceed 37 °. In addition, the use of good performance bit bus (BITBUS) microcomputer, to achieve the drawing curve, casting process parameters display, printing, storage, accident handling Alarm and other functions.In this paper, the fixed-point intervals between the calculation of drawing curve, the fixed window data to determine the triple point temperature random changes, manual adjustment of the keyboard draw curve parameters and time-sharing multi-task method is simple and practical proof of the actual operation System performance is stable and reliable