基 于 支 持 向 量 机 的 模 拟 月 壤 临 界 尺 度颗 粒 切 削 负 载 识 别

The critical fragments whose average diameter is slightly larger than or equal to the diameter of the bit coring hole will produce two migration modes：hole bottom output and hole wall input in the process of coring drilling，which will lead to the change of drilling load. By establishing the cutting model，it is obtained that the influence of cutting speed on cutting force is small and can be ignored in low-speed cutting. The cutting test is carried out on the critical scale particles with different particle sizes，and the variation curve of cutting load with time is obtained. The cutting load is identified by support vector machine（SVM）. The results show that the recognition rate of homogeneous simulated lunar soil cutting load is 100%，and the recognition rate of simulated lunar soil cutting load with critical scale particles is more than 95.5%. The research results can provide a reference for the on-line identification technology of lunar unmanned drilling sampling.