采煤机无人自适应变速截割控制方法

摘要

为了实现采煤机的无人自动化采煤,并使采煤机在截煤时的块煤率及截割比能耗等截割性能参数综合较优,通过分析现有采煤机的工作原理及特性并建立采煤机变速截割仿真模型,得到煤层截割阻抗与截割电机定子电流的关系.在此基础上,提出一种适用于滚筒采煤机的自适应变速截割控制方法,通过划分煤层截割阻抗范围,对采煤机的牵引速度和滚筒转速进行分级优化调节,根据采煤机截割电机定子电流及时间信号,结合所制定的控制策略实现采煤机对煤层截割阻抗的自动识别及自适应调速控制,最后进行仿真分析及试验进行验证.研究结果表明:该控制方法可取得较好效果并具有可行性,为实现采煤机自适应变速截割及无人化自动采矿提供参考.%In order to achieve shearer's unmanned cutting and obtain the integrated optimal cutting performance parameters such as lump coal rate and energy consumption rate,the relationship between coal seam cutting impedance and cutting motor stator current was acquired by analyzing current shearer's working theory and building the simulation model.Furthermore,an adaptive control method of shearer with variable speed cutting was presented.The coal seam cutting impedance was divided into different ranges,and each range corresponds to the optimized hauling speed and drum rotation speed.The ranges were identified by using fuzzy control technology based on the cutting motor stator current and the duration time,coal seam cutting impedance identification and adaptive speeds control were implemented with specific strategy.At last,the simulation and experiment were conducted.The results show that this method is favorable and feasible,which provides theoretical reference to the implement of shearer high efficiency cutting and unmanned mining.