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1.桂林理工大学 先进制造与自动化技术重点实验室,桂林 541006
2.广西广汇低温设备有限公司技术部,桂林 541100
3.安徽农业大学 工学院,合肥 230036
刘姣娣,女,1975年生,湖南武冈人,博士,教授,硕士生导师;主要研究方向为智能农业机械;467803707@qq.com。
收稿日期:2025-05-03,
修回日期:2025-06-16,
网络出版日期:2025-08-21,
移动端阅览
刘姣娣,姚之杰,钟春燕,等.基于复杂运动轨迹轮系的除草机构的设计与优化[J].机械传动,XXXX,XX(XX):1-11.
LIU Jiaodi,YAO Zhijie,ZHONG Chunyan,et al.Design and optimization of weed control mechanism with complex motion trajectory gear system[J].Journal of Mechanical Transmission,XXXX,XX(XX):1-11.
目的
2
针对目前始终存在的由于花生除草机构难以完成有效的株间除草运动轨迹从而导致伤根或者不可避免地出现除草盲区等问题,提出一种将除草杆件与2阶复杂齿轮系结构相结合的方法。利用由2阶椭圆齿轮大幅传动比的变化引起的末端连杆不等速的传动特性,实现末端连杆周期性的株间除草运动。
方法
2
将2阶非圆齿轮摆杆式除草机构简化为开链2R机构并建立正向运动学模型,通过Matlab软件中的图形用户界面Graphical User Interface(GUI)开发简化的开链2R除草机构辅助分析优化软件,探索关键结构参数与运动参数对除草动轨迹的影响;采用响应面法研究多因素对轨迹的交互作用,结合农艺要求确定对应的机构参数边界条件;最终通过遗传算法对该轮系摆杆机构的各项参数进行精确优化,以实现满足农艺除草要求的优化目标。
结果
2
Adams软件仿真结果表明,复杂运动轨迹与理论模型基本一致,验证了该轮系摆杆机构设计的可行性。
Objective
2
To address the current challenges in achieving effective inter-plant weeding trajectories with peanut weeding mechanisms
which often result in root injury or unavoidable weeding blind zones
a method that combines the weeding rod with a second-order complex gear train structure was proposed. The unequal-speed transmission characteristics of the end linkage
caused by large-scale transmission ratio changes of the second-order elliptical gear
were utilized to achieve a periodic inter-plant weeding motion.
Methods
2
The second-order non-circular gear pendulum weeding mechanism was simplified to an open-chain 2R mechanism
and its forward kinematics model was established. The Graphical User Interface (GUI) in Matlab software was used to develop auxiliary analysis and optimization software for the simplified open-chain 2R weeding mechanism to explore the effects of key structural and kinematic parameters on the weeding trajectory. Response surface methodology was applied to analyze the interaction of multiple factors on the trajectory. The boundary conditions of the mechanism parameters were determined based on agronomic requirements. Finally
the parameters of the gear train pendulum mechanism were optimized using a genetic algorithm to meet the agronomic weeding requirements.
Results
2
Adams simulation shows that the complex trajectory aligns with the theoretical model
verifying the feasibility of the gear train pendulum mechanism design.
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