吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (7): 2143-2151.doi: 10.13229/j.cnki.jdxbgxb.20211002

• 农业工程·仿生工程 • 上一篇    

基于支持向量机的模拟月壤临界尺度颗粒切削负载识别

田野1(),李楠楠1,刘君巍2,姜生元2(),王储3,张伟伟2   

  1. 1.哈尔滨商业大学 轻工学院,哈尔滨 150028
    2.哈尔滨工业大学 宇航空间机构及控制研究中心,哈尔滨 150001
    3.北京空间飞行器总体设计部 中国空间技术研究院,北京 100094
  • 收稿日期:2021-10-03 出版日期:2023-07-01 发布日期:2023-07-20
  • 通讯作者: 姜生元 E-mail:tian8154@126.com;jiangshy@hit.edu.cn
  • 作者简介:田野(1981-),男,教授,博士.研究方向:极端坏境装备的地面模拟技术,月球水冰模拟样本制备工艺及其装置研制.E-mail: tian8154@126.com
  • 基金资助:
    国家自然科学基金项目(41772387);黑龙江省自然科学基金项目(LH2020E027);哈尔滨商业大学青年创新人才项目(2019CX04)

Identification of critical fragments cutting load of simulated lunar soil based on support vector machine

Ye TIAN1(),Nan-nan LI1,Jun-wei LIU2,Sheng-yuan JIANG2(),Chu WANG3,Wei-wei ZHANG2   

  1. 1.College of Light Industry,Harbin University of Commerce,Harbin 150028,China
    2.Aerospace Mechanism and Control Research Center,Harbin Institute of Technology,Harbin 150001,China
    3.Beijing Aerospace Vehicle Overall Design Department,China Academy of Space Technology,Beijing 100094,China
  • Received:2021-10-03 Online:2023-07-01 Published:2023-07-20
  • Contact: Sheng-yuan JIANG E-mail:tian8154@126.com;jiangshy@hit.edu.cn

摘要:

针对平均直径略大于或者等于钻头取芯孔直径的临界尺度颗粒,在取芯钻进过程中会产生孔底置出及孔壁置入两种运移方式而导致钻进负载发生变化的问题。通过建立切削模型,得到在低速切削时,切削速度对切削力影响较小可以忽略,并进行了试验验证;对含有不同粒径的临界尺度颗粒进行切削试验,得到切削负载随时间变化曲线,利用支持向量机(SVM)方法对切削负载进行识别,结果显示对均质模拟月壤切削负载的识别率为100%,对含有临界尺度颗粒的模拟月壤切削负载识别率均在95.5%以上。研究结果可为月面无人钻取采样在线识别技术提供参考。

关键词: 地面力学, 模拟月壤, 支持向量机, 切削速度, 切削力

Abstract:

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.

Key words: terramechanics, simulated lunar soil, support vector machine, cutting speed, cutting force

中图分类号: 

  • TU41

图1

探测器月面采样图"

图2

临界尺度颗粒运移特性图"

图3

临界尺度颗粒孔底运移方式"

图4

切削刃受力分析图"

图5

模拟月壤样本"

表1

真实月壤与模拟月壤物理力学参数"

机械参数月壤模拟月壤
密度/(g·cm-31.3~2.292.1
内摩擦角/(°)25~5034.96
内聚力/kPa0.26~1.80.35

图6

切削测试系统原理图"

表2

旋转速度换算为直线速度"

旋转速度ω/(r·min-180100120
切削速度v/(m·s-10.06120.07870.0942

图7

切削均质模拟月壤"

图8

平均切削阻力变化曲线"

图9

切削参数时域图像"

图10

测试集的实际分类和预测分类图"

图11

切削力时域曲线"

图12

临界尺度颗粒的孔底置出运移特性"

图13

临界尺度颗粒的孔底置入运移特性"

图14

识别率"

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