滚筒截割负载扰动对采煤机调高的影响

Influences of Drum Cutting Load Disturbances on Shearer Height Adjustments

针对采煤机调高过程中滚筒截割负载扰动对调高机构动态响应特性的影响进行了研究。根据非对称阀控缸模型,建立了调高机构控制传递函数模型。根据采煤机工况分析了滚筒截割负载等效到调高机构的负载模型。使用常规PID和模糊PID控制器对不同滚筒截割载荷和牵引速度情况下的调高机构进行了控制仿真。研究结果表明:使用模糊PID控制器对调高机构进行控制,具有更好的跟踪性能,控制效果受截割阻抗和牵引速度的变化影响更小。

Influences of drum cutting load disturbances on dynamic response characteristics of high mechanism during height adjustments of shearers were studied.According to the model of asymmetrical valve controlled cylinder,a transfer function model of height adjustment mechanisms was established.According to the working conditions of shearer,a load model of drum cutting load equivalent to height adjustment mechanism was analyzed.Conventional PID and fuzzy PID controller were used to control the mechanisms of different drum cutting loads and traction speeds.The results show that,fuzzy PID controller has better tracking performance,and the control effectiveness is less affected by cutting impedances and traction speeds.