Journal of Terramechanics最新文献_第7页

A terramechanics model for high slip angle and skid with prediction of wheel-soil interaction geometry 基于轮-土相互作用几何预测的大滑移角和滑移的地球力学模型

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-09-13 DOI: 10.1016/j.jterra.2023.08.004

Catherine Pavlov, Aaron M. Johnson

引用次数: 0

An analytical model for stress estimation at the soil-tire interface using the dynamic contact length 用动态接触长度估算土-轮胎界面应力的解析模型

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-09-09 DOI: 10.1016/j.jterra.2023.08.006

Behzad Golanbari, Aref Mardani

{"title":"An analytical model for stress estimation at the soil-tire interface using the dynamic contact length","authors":"Behzad Golanbari, Aref Mardani","doi":"10.1016/j.jterra.2023.08.006","DOIUrl":"https://doi.org/10.1016/j.jterra.2023.08.006","url":null,"abstract":"<div><p>The interaction between soil and tire is a complex phenomenon influenced by various factors, such as soil properties, vertical load on the wheel, and tire characteristics. However, estimating stress at the tire-soil interface is a challenging task due to the unpredictable nature of soil. Existing models for investigating the wheel-soil interaction are based on soil mechanical parameters, which are highly variable and require significant time and resources to measure accurately. In contrast, the amount of wheel sinkage into the soil can be measured in real-time and is derived from the mechanical properties of the soil. Therefore, there is a need to establish a relationship between stress and wheel characteristics such as dynamic contact length and tire sinkage in soil. To address this issue, this study introduces an analytical method to estimate the dynamic contact surface between the tire and soil. A mathematical model is then proposed to estimate stress, assuming the contact surface and variable pressure at the interface between the soil and tire. The stress model is validated through experimental tests conducted at three different vertical load levels and four different wheel traffic levels in the soil bin, repeated three times.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49876191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and experimental identification of spring-damping properties of the off-road vehicle rubber tracks, rubber belts, and rubber-bushed tracks subjected to flexural vibrations 越野车橡胶履带、橡胶带和橡胶衬套履带在弯曲振动下弹簧阻尼特性的建模和实验鉴定

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-09-04 DOI: 10.1016/j.jterra.2023.08.007

Jakub Chołodowski

{"title":"Modelling and experimental identification of spring-damping properties of the off-road vehicle rubber tracks, rubber belts, and rubber-bushed tracks subjected to flexural vibrations","authors":"Jakub Chołodowski","doi":"10.1016/j.jterra.2023.08.007","DOIUrl":"10.1016/j.jterra.2023.08.007","url":null,"abstract":"<div><p>In the article, a model for predicting the energy losses caused by the flexural vibrations of rubber tracks, rubber belts, and rubber-bushed metal link-tracks for off-road vehicles is proposed, and a test stand and an experimental procedure are developed to identify the mechanical parameters of this model. The track or belt is represented by a chain of discrete rigid links connected by revolute joints, and a discrete spring-element is placed in parallel with multiple Maxwell-elements in each joint to capture the flexural rigidity and damping of the real track or belt. The mechanical parameters of the joint are found by testing real tracks or belts under cyclic bending. The models consisting of three, four, or five Maxwell-elements per joint are the most successful in predicting the response of a sample rubber track to cyclic bending. The spring-damping properties of tracks and belts identified with the method discussed herein can be applied in simulation studies on the interaction of tracked vehicles and soil. Furthermore, vehicle elements such as rubber bushings for suspension systems, rubber torsion springs, and oil-filled and rubber torsion dampers can be tested with this method to find their spring-damping properties required by vehicle dynamics simulations.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44494243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on drag reduction performance of sliding plate of rice direct seeding machine based on non-smooth structure of loach surface 基于泥鳅表面非光滑结构的水稻直播机滑板减阻性能研究

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-09-02 DOI: 10.1016/j.jterra.2023.08.008

Hongchang Wang , Kaiquan Ding , Guozhong Zhang , Zhen Jiang , Abouelnadar El. Salem , Yuan Gao

{"title":"Research on drag reduction performance of sliding plate of rice direct seeding machine based on non-smooth structure of loach surface","authors":"Hongchang Wang , Kaiquan Ding , Guozhong Zhang , Zhen Jiang , Abouelnadar El. Salem , Yuan Gao","doi":"10.1016/j.jterra.2023.08.008","DOIUrl":"10.1016/j.jterra.2023.08.008","url":null,"abstract":"<div><p>Sliding plate has the problems of large sliding resistance and serious soil adhesion. Loach moves freely and flexibly in mud, has highly efficient lubrication and drag reduction effects. The sliding plate of rice direct seeding machine was selected as the research object and loach as the bionic prototype. The macroscopic and microscopic structure characteristics of loach were observed, the body surface of loach was covered by scales, which had a ridged non-smooth structure. The simulation analysis of the drag reduction performance of the non-smooth structure was carried out, the maximum drag reduction rate was 2.55% at the speed of 1 m/s. A bionic sliding plate of rice direct-seeding machine was constructed based on the non-smooth structure of loach body surface, and its working performance was simulated and analyzed. The results of orthogonal test show that the order of primary and secondary factors of bionic structure parameters affecting drag reduction rate was ribbed spacing > ribbed width > ribbed height. The optimal parameter combination was ribbing height 4 mm, ribbing width 4.5 mm, ribbing spacing, and the optimal drag reduction rate was 4.21%. The results of this study can provide theoretical support for bionic design of soil-engaging components in wet and soft paddy field.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46054258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Push-pull locomotion: Increasing travel velocity in loose regolith via induced wheel slip 推拉运动：通过诱导车轮打滑增加松散风化层中的行驶速度

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-09-02 DOI: 10.1016/j.jterra.2023.08.005

Cyndia Cao , Deaho Moon , Colin Creager , Dennis K. Lieu , Hannah S. Stuart

{"title":"Push-pull locomotion: Increasing travel velocity in loose regolith via induced wheel slip","authors":"Cyndia Cao , Deaho Moon , Colin Creager , Dennis K. Lieu , Hannah S. Stuart","doi":"10.1016/j.jterra.2023.08.005","DOIUrl":"10.1016/j.jterra.2023.08.005","url":null,"abstract":"<div><p>Push–pull locomotion is an effective mobility mode for traversing loose lunar regolith and climbing sandy slopes. A rover with an active suspension can generate thrust from a set of anchored wheels by adjusting its wheelbase while driving the remaining wheels. This paper explores the relationship between the velocities of the rotational and translational suspension elements. Using a kinematic slip greater than 30%–40%, inchworming surpasses both the travel velocity and power efficiency of normal driving on slopes between 10°–20°. On a 20°slope, inchworming improves travel reduction from 98% to 85% and reduces normalized power consumption by a factor of eight. Experiments with NASA’s upcoming Volatiles Investigating Polar Exploration Rover show that increasing kinematic slip increases its travel velocity in a sink tank by 35%. Models using granular resistive force theory indicate that wheels driving at higher slip can generate greater tractive force and thus reduce the load on the anchored wheels. Otherwise, at lower driving slip, the load capacity of anchored wheels may be exceeded and result in oscillatory overall travel. These experiments suggest that there is further room to improve wheeled locomotion by intentionally inducing wheel slip, especially in articulated suspensions.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41475001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Literature review on Archimedean screw propulsion for off-road vehicles 非公路车辆阿基米德螺旋推进的文献综述

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-08-01 DOI: 10.1016/j.jterra.2023.05.001

Jorge Villacrés, Martin Barczyk, Michael Lipsett

引用次数: 2

Terrain classification using mars raw images based on deep learning algorithms with application to wheeled planetary rovers 基于深度学习算法的火星原始图像地形分类及其在轮式行星探测器上的应用

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-08-01 DOI: 10.1016/j.jterra.2023.04.002

Junlong Guo, Xingyang Zhang, Yunpeng Dong, Zhao Xue, Bo Huang

{"title":"Terrain classification using mars raw images based on deep learning algorithms with application to wheeled planetary rovers","authors":"Junlong Guo, Xingyang Zhang, Yunpeng Dong, Zhao Xue, Bo Huang","doi":"10.1016/j.jterra.2023.04.002","DOIUrl":"https://doi.org/10.1016/j.jterra.2023.04.002","url":null,"abstract":"<div><p>Scene information plays a crucial role in motion control, attitude perception, and path planning for wheeled planetary rovers (WPRs). Terrain recognition is the fundamental component of scene recognition. Due to the rich information, visual sensors are usually used in terrain classification. However, teleoperation delay prevents WPRs from using visual information efficiently. End-to-end learning method of deep learning (DL) that does not need complex image preprocessing was proposed to deal with this issue. This paper first built a terrain dataset (consists of loose sand, bedrock, small rock, large rock, and outcrop) using real Mars images to directly support You Only Look Once (YOLOv5) to test its performance on terrain classification. Because the capability of end-to-end training scheme is positively correlated with dataset, the performance of YOLOv5 can be significantly improved by exploiting orders of magnitude more data. The best combination of hyperparameters and models was achieved by slightly tuning YOLOv5, and data augmentation was also applied to optimize its accuracy. Furthermore, its performance was compared with two other end-to-end network architectures. Deep learning algorithms can be used in the future planetary exploration missions, such as WPRs autonomy improvement, traversability analysis, and avoiding getting trapped.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49865924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional DEM tillage simulation: Validation of a suitable contact model for a sweep tool operating in cohesion and adhesion soil 三维DEM耕作模拟:在黏性和附着力土壤中操作的扫描工具的合适接触模型的验证

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-08-01 DOI: 10.1016/j.jterra.2023.05.003

Chunling Zhang , Jin Xu , Zihao Zheng , Weiwei Wang , Lichao Liu , Liqing Chen

{"title":"Three-dimensional DEM tillage simulation: Validation of a suitable contact model for a sweep tool operating in cohesion and adhesion soil","authors":"Chunling Zhang , Jin Xu , Zihao Zheng , Weiwei Wang , Lichao Liu , Liqing Chen","doi":"10.1016/j.jterra.2023.05.003","DOIUrl":"10.1016/j.jterra.2023.05.003","url":null,"abstract":"<div><p>Discrete element modelling (DEM) is widely used to estimate soil-tool interaction and tillage forces. To run an accurate simulation, it is essential to determine the appropriate DEM contact model and parameters. Although previous work has been introduced to determine the DEM contact model and parameters, the accuracy of numerical simulation is not high because of the soil differences when tillage tools operate in cohesion and adhesion soil in the middle and lower reaches of the Yangtze River in China. In this paper a Hertz-Mindlin with JKR Cohesion contact model and Linear Cohesion contact model were used to predict soil disturbance area and draft forces. The DEM parameters were determined using cone penetration, and uniaxial unconfined compression as an assisted test. The field experiment using sweep tool was used to validate the simulation results. A good agreement has been showed between simulation results and experiment results. Using verified model, the relative error for the predicted soil disturbance area at speeds of 0.50, 0.75 and 1.00 m/s were 5.3, 3.6 and 7.1 %, respectively. The maximum and average relative errors between simulated and measured draft forces were 6.98 and 3.91%, respectively. The effect of tillage depth and speed at soil disturbance area and draft forces were found which can provide some guidance for the selection of parameters during actual operation.</p></div>","PeriodicalId":50023,"journal":{"name":"Journal of Terramechanics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47984064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlations between moisture content and color spectrum of sandy soils 砂质土壤水分含量与光谱的相关性研究

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-08-01 DOI: 10.1016/j.jterra.2023.05.002

György Pillinger , Ahmed Elawad Eltayeb Ahmed , Kornél Bessenyei , Péter Kiss

引用次数: 0

Load bearing capacity of finite half space agricultural homogeneous soil 有限半空间农业均匀土的承载能力

IF 2.4 3区工程技术

Journal of Terramechanics Pub Date : 2023-06-01 DOI: 10.1016/j.jterra.2023.03.001

Nihal D. Salman , György Pillinger , György Sitkei , Péter Kiss

引用次数: 0