The reliable operation of high-speed wire rod finishing mills is crucial in the steel production enterprise.As complex system-level equipment,it is difficult for high-speed wire rod finishing mills to realize fault lo...The reliable operation of high-speed wire rod finishing mills is crucial in the steel production enterprise.As complex system-level equipment,it is difficult for high-speed wire rod finishing mills to realize fault location and real-time monitoring.To solve the above problems,an expert experience and data-driven-based hybrid fault diagnosis method for high-speed wire rod finishing mills is proposed in this paper.First,based on its mechanical structure,time and frequency domain analysis are improved in fault feature extraction.The approach of combining virtual value,peak value with kurtosis value index,is adopted in time domain analysis.Speed adjustment and side frequency analysis are proposed in frequency domain analysis to obtain accurate component characteristic frequency and its corresponding sideband.Then,according to time and frequency domain characteristics,fault location based on expert experience is proposed to get an accurate fault result.Finally,the proposed method is implemented in the equipment intelligent diagnosis system.By taking an equipment fault on site,for example,the effectiveness of the proposed method is illustrated in the system.展开更多
The high-speed wire rod finishing mill production line consisting of more than 10 key items of equipment such as a heating furnace,major rolling mill, secondary rolling mill,preliminary refining mill, finishing mill, ...The high-speed wire rod finishing mill production line consisting of more than 10 key items of equipment such as a heating furnace,major rolling mill, secondary rolling mill,preliminary refining mill, finishing mill, carrier roller, wire-drive machine, coiler, and packing machine, is a technology-intensive product combining modern rolling technology with the high-technology of machinery, electronics,hydromatic drive and instrumentation, which only a few countries in the world can produce.展开更多
为了解决500 k V紧凑型耐张杆塔塔头结构复杂,传统绕击跳闸率计算方式无法准确计算此类杆塔绕击跳闸率的问题,通过建立500 k V紧凑型耐张杆塔精细化模型,提出了基于全档距绕击耐雷性能分析方法的紧凑型耐张杆塔绕击跳闸率分析方法,并研...为了解决500 k V紧凑型耐张杆塔塔头结构复杂,传统绕击跳闸率计算方式无法准确计算此类杆塔绕击跳闸率的问题,通过建立500 k V紧凑型耐张杆塔精细化模型,提出了基于全档距绕击耐雷性能分析方法的紧凑型耐张杆塔绕击跳闸率分析方法,并研究了此类型杆塔在拆除分支地线前后绕击跳闸率的变化。分析结果表明,拆除分支地线后,杆塔的绕击跳闸率提高约16.3%,针对这种情况考虑加装塔头侧针来改善线路防绕击性能。研究结果表明,安装塔头侧针可以显著降低杆塔绕击跳闸率,当3个跳线横担均加装塔头侧针时,可使杆塔的绕击跳闸率降低约59.25%。研究成果对指导我国500k V紧凑型耐张杆塔防雷改造提供了重要的参考依据。展开更多
基金the National Key Research and Development Program of China under Grant 2021YFB3301300the National Natural Science Foundation of China under Grant 62203213+1 种基金the Natural Science Foundation of Jiangsu Province under Grant BK20220332the Open Project Program of Fujian Provincial Key Laboratory of Intelligent Identification and Control of Complex Dynamic System under Grant 2022A0004.
文摘The reliable operation of high-speed wire rod finishing mills is crucial in the steel production enterprise.As complex system-level equipment,it is difficult for high-speed wire rod finishing mills to realize fault location and real-time monitoring.To solve the above problems,an expert experience and data-driven-based hybrid fault diagnosis method for high-speed wire rod finishing mills is proposed in this paper.First,based on its mechanical structure,time and frequency domain analysis are improved in fault feature extraction.The approach of combining virtual value,peak value with kurtosis value index,is adopted in time domain analysis.Speed adjustment and side frequency analysis are proposed in frequency domain analysis to obtain accurate component characteristic frequency and its corresponding sideband.Then,according to time and frequency domain characteristics,fault location based on expert experience is proposed to get an accurate fault result.Finally,the proposed method is implemented in the equipment intelligent diagnosis system.By taking an equipment fault on site,for example,the effectiveness of the proposed method is illustrated in the system.
文摘The high-speed wire rod finishing mill production line consisting of more than 10 key items of equipment such as a heating furnace,major rolling mill, secondary rolling mill,preliminary refining mill, finishing mill, carrier roller, wire-drive machine, coiler, and packing machine, is a technology-intensive product combining modern rolling technology with the high-technology of machinery, electronics,hydromatic drive and instrumentation, which only a few countries in the world can produce.
文摘为了解决500 k V紧凑型耐张杆塔塔头结构复杂,传统绕击跳闸率计算方式无法准确计算此类杆塔绕击跳闸率的问题,通过建立500 k V紧凑型耐张杆塔精细化模型,提出了基于全档距绕击耐雷性能分析方法的紧凑型耐张杆塔绕击跳闸率分析方法,并研究了此类型杆塔在拆除分支地线前后绕击跳闸率的变化。分析结果表明,拆除分支地线后,杆塔的绕击跳闸率提高约16.3%,针对这种情况考虑加装塔头侧针来改善线路防绕击性能。研究结果表明,安装塔头侧针可以显著降低杆塔绕击跳闸率,当3个跳线横担均加装塔头侧针时,可使杆塔的绕击跳闸率降低约59.25%。研究成果对指导我国500k V紧凑型耐张杆塔防雷改造提供了重要的参考依据。
