To solve the problem of weeding under Y-trellis pear orchards,a unilateral obstacle-avoiding mower(UOAM)was developed in this study.The mower is composed of an obstacle-avoiding disc mechanism,a hydraulic profiling me...To solve the problem of weeding under Y-trellis pear orchards,a unilateral obstacle-avoiding mower(UOAM)was developed in this study.The mower is composed of an obstacle-avoiding disc mechanism,a hydraulic profiling mechanism,and a cutting disc mechanism.The diameter of the obstacle-avoiding disc was 0.7 m,which could swing around the trunk or ground pile actuated by the spring mechanism.The piston movement of the hydraulic cylinder controls the working position of the obstacle-avoiding disc.The maximum extension distance of the hydraulic profiling arm was 1 m.Based on the national standards and actual situation of orchards,the optimum parameters were determined with a combination of advancing speed of 0.44 m/s,rotation speed of the cutting disc at 2000 r/min,blade number of 2,and cutting edge length of 0.2 m.Finally,the design parameters were verified by the mathematical model of the blade cutting edge trajectory and multi-body dynamics simulation.Taking stubble cutting stability,leakage rate,working efficiency and costs as the test indexes,field performance comparison tests were carried out on the three operation modes of UOAM mowing,shoulder carrying mower(SCM)mowing and manual weeding.Test results showed that the coefficient variation of stubble cutting height of UOAM was the smallest,showing that the working stability of UOAM was better than the other two treatments.The leakage rate of UOAM was 2.42%,and its coefficient variation was lower than that of SCM.The working efficiency of UOAM was much higher than that of SCM and manual weeding,which was 4.44 times of SCM and 20 times of manual weeding.The profitable area of UOAM was 7.02 hm^(2),showing that it was suitable for large-scale mechanized Y-trellis pear orchards.展开更多
为研究割草除根松土一体式刀片结构参数对其作业性能的影响,基于离散元法(discrete element method,EDEM)软件建立三维离散元仿真模型,模拟刀片在刨土作业过程中的破土效果。通过单因素试验分析前进速度、旋转速度及刀片倾角对破土率的...为研究割草除根松土一体式刀片结构参数对其作业性能的影响,基于离散元法(discrete element method,EDEM)软件建立三维离散元仿真模型,模拟刀片在刨土作业过程中的破土效果。通过单因素试验分析前进速度、旋转速度及刀片倾角对破土率的影响规律,进一步采用Box-Behnken正交试验结合响应面分析法建立破土率预测模型并进行参数优化。正交试验结果表明,刀片倾角是影响破土率的主要因素,其次为旋转速度,三因素交互作用亦具有显著性。在最优参数组合下,前进速度1.39 m/s、旋转速度107 rad/s、刀片倾角4.7°,破土率达到78.3%。研究结果为山地割草除根松土装置的结构设计与参数配置提供理论依据和实践指导。展开更多
With the increasing demand for garden landscaping,the development and application of small smart lawn mowers have become particularly important.This paper presents a series of innovative design concepts and maintenanc...With the increasing demand for garden landscaping,the development and application of small smart lawn mowers have become particularly important.This paper presents a series of innovative design concepts and maintenance strategies through an in-depth study of the modular design and intelligent maintenance systems of small smart lawn mowers.The article first outlines the basic concepts of modular design and,combined with the actual needs of smart lawn mowers,details the specific implementation of the design.Next,the article discusses the construction methods of the intelligent maintenance system,emphasizing technical applications in fault diagnosis and remote monitoring.Through theoretical analysis and empirical research,this paper aims to provide more efficient and reliable smart mowing solutions for modern garden landscaping.展开更多
基金the China Agriculture Research System of MOF and MARA(Grant No.CARS-28-21)Jiangsu Agricultural Science and Technology Innovation Fund(Grant No.CX(21)2025)Jiangsu Modern Agricultural Machinery Equipment and Technology Demonstration Extension Fund(Grant No.NJ2019-28).
文摘To solve the problem of weeding under Y-trellis pear orchards,a unilateral obstacle-avoiding mower(UOAM)was developed in this study.The mower is composed of an obstacle-avoiding disc mechanism,a hydraulic profiling mechanism,and a cutting disc mechanism.The diameter of the obstacle-avoiding disc was 0.7 m,which could swing around the trunk or ground pile actuated by the spring mechanism.The piston movement of the hydraulic cylinder controls the working position of the obstacle-avoiding disc.The maximum extension distance of the hydraulic profiling arm was 1 m.Based on the national standards and actual situation of orchards,the optimum parameters were determined with a combination of advancing speed of 0.44 m/s,rotation speed of the cutting disc at 2000 r/min,blade number of 2,and cutting edge length of 0.2 m.Finally,the design parameters were verified by the mathematical model of the blade cutting edge trajectory and multi-body dynamics simulation.Taking stubble cutting stability,leakage rate,working efficiency and costs as the test indexes,field performance comparison tests were carried out on the three operation modes of UOAM mowing,shoulder carrying mower(SCM)mowing and manual weeding.Test results showed that the coefficient variation of stubble cutting height of UOAM was the smallest,showing that the working stability of UOAM was better than the other two treatments.The leakage rate of UOAM was 2.42%,and its coefficient variation was lower than that of SCM.The working efficiency of UOAM was much higher than that of SCM and manual weeding,which was 4.44 times of SCM and 20 times of manual weeding.The profitable area of UOAM was 7.02 hm^(2),showing that it was suitable for large-scale mechanized Y-trellis pear orchards.
文摘为研究割草除根松土一体式刀片结构参数对其作业性能的影响,基于离散元法(discrete element method,EDEM)软件建立三维离散元仿真模型,模拟刀片在刨土作业过程中的破土效果。通过单因素试验分析前进速度、旋转速度及刀片倾角对破土率的影响规律,进一步采用Box-Behnken正交试验结合响应面分析法建立破土率预测模型并进行参数优化。正交试验结果表明,刀片倾角是影响破土率的主要因素,其次为旋转速度,三因素交互作用亦具有显著性。在最优参数组合下,前进速度1.39 m/s、旋转速度107 rad/s、刀片倾角4.7°,破土率达到78.3%。研究结果为山地割草除根松土装置的结构设计与参数配置提供理论依据和实践指导。
文摘With the increasing demand for garden landscaping,the development and application of small smart lawn mowers have become particularly important.This paper presents a series of innovative design concepts and maintenance strategies through an in-depth study of the modular design and intelligent maintenance systems of small smart lawn mowers.The article first outlines the basic concepts of modular design and,combined with the actual needs of smart lawn mowers,details the specific implementation of the design.Next,the article discusses the construction methods of the intelligent maintenance system,emphasizing technical applications in fault diagnosis and remote monitoring.Through theoretical analysis and empirical research,this paper aims to provide more efficient and reliable smart mowing solutions for modern garden landscaping.
