潜孔钻机推进回转自适应系统模糊控制研究

【作者】 郭艳；

【导师】 赵宏强；

【作者基本信息】 中南大学 ， 机械电子工程， 2011， 硕士

【摘要】 推进回转自适应模糊控制系统的设计能有效提高潜孔钻机钻孔效率,起到节能作用。国内现有潜孔钻机的推进回转液压系统几乎没有根据负载的变化情况进行自动调控。本文针对潜孔钻机的工况需求,提出潜孔钻机钻孔作业时推进回转系统自适应方案,建立仿真模型并进行实验验证。本文首先阐述了国内外潜孔钻机的发展状况。其次分析了潜孔钻机液压系统原理并提出推进回转系统自适应方案,即将回转马达进口处的压力信号通过控制器实时调控推进回路上电液比例减压阀出口压力从而控制推进力的大小。接着针对新方案的提出,使用功率键合图法建立了潜孔钻机推进回转液压系统模型并在simulink中进行仿真分析。最后利用电液比例技术和模糊控制理论,通过实验验证钻孔作业时推进回转系统自适应方案的正确性与可行性。本文建立的潜孔钻机推进回转液压系统,能根据负载自动调节推进力的大小,改善了因推进力过小造成钻孔效率降低和因推进力过大加剧钻头磨损的不足,对潜孔钻机的系统改进和性能提高具有现实重要的意义。更多还原

【Abstract】 Feeding and rotating self-adaptive system is designed to improve drilling efficiency and save energy. Feeding and rotating system of down-the-hole drill existing in China haven’t no changes on the feeding force with the load variances. According to working condition requirements of down-the-hole drill, this paper proposes down-the-hole drill feeding and rotating system self-adaptive plan during drilling, establishes a simulation model and do an experiment verification.Firstly, this paper describes developments of down-the-hole drill home and abroad. Then hydraulic systems of down-the-hole drill are analyzed, and feeding and rotating system self-adaptive plan is presented. This plan is that pressure signal of rotating motor’s inlet controls pressure of electro-hydraulic proportional reducing valve’s outlet by controller. According to the new proposed plan, the model of feeding and rotating hydraulic system is established and simulated. Finally, based on the electro-hydraulic proportional technology and fuzzy controlling theory, the feeding and rotating system self-adaptive plan is verified accurate and feasible by experiment.In this paper, feeding and rotating hydraulic system is analyzed by power bond graph, and the simulation is finished in simulink. The experiment is finished by appropriate modification on Sunward’s down-the-hole drill and simulating external load with clamping device. That variance trend of the test curve is consistent with the simulation results furter validates feasibility of the plan. Thus, this paper has an important significance of improving drilling performance of down-the-hole drill.更多还原