Load Spectrum Research of Roadheader Cutting Header based on Rain Flow Method

Because underground load spectra measured work is seldom researched, a large capacity data recorder, also called as “black box”, that can be used underground for a long time and storage machine working condition data has been invented and used. Combined the actual measured data with cutting motor current and voltage and other roadheader parameters, the value of torque that cutting head suffered can be calculated and, the one-dimensional load spectrum in time domain can be drawn. By analyzing, it is found that there may be a static component. Moreover, two-dimension load spectrum based on rain flow count method can be drawn and then it is used to conclude the value of the static load and the range of dynamic load.