非圆齿轮行星系植苗机构分析与设计方法研究

The "zero-speed" transplanting approach can not ensure the rate of standing seedlings, and the traditional transplanting mechanism can not satisfy the high-speed transplanting requirement of the pot seedlings on the dry land. Out of these problems, this project has proposed a new thread to increase the rate of standing seedlings and decrease the rate of damaged seedlings, that is to ensure the ideal kinematics characteristic of the transplanting rostrum and form ideal transplanting cave. Besides, guided by this thread, a novel non-circular planetary gears trains transplanting mechanism which is supposed to ensure the high rate of standing seedlings and low rate of damaged seedlings during the planting process, has been put forward..The main contents of this project are as bellow. Study the requirements of kinematics characteristic that the transplanting rostrum should satisfy and the shape of the transplanting cave during the planting process. Study the structural synthesis and kinematics characteristic of the non-circular planetary gears trains transplanting mechanism, furthermore, put forward the variable step size interval extension method to solve the boundary of mechanical parameters that can satisfy the ideal requirements rapidly. Establish the dynamic model and assessment criteria of this transplanting mechanism. Establish the optimization model and conduct parametric optimization by setting the assessment criteria and the boundary of mechanical parameters as the object and constraint condition respectively. Develop two or three kinds of optimal non-circular planetary gears trains transplanting mechanisms and carry out test study to verify and modify the former established models..This project will build a systematic study platform for the transplanting mechanism, which will provide the technological support for developing new-type high-speed pot seedling transplanters. Besides, the structural analysis and design method of the non-circular planetary gears trains that can meet specific requirements such as trajectory and gesture, will be proposed. And this will provide examples and thoughts for studying the non-circular planetary gears trains mechanisms for other uses.

针对"零速度"移栽无法保证立苗率和传统植苗机构不能满足钵苗旱地高速移栽要求的问题，本项目提出通过保证栽植嘴理想运动学特性和形成理想穴口来提高立苗率和降低损伤率的新思路，并在该思路指导下提出非圆齿轮行星系植苗机构以保证高速植苗过程的高立苗率、低损伤率。.内容包括：植苗过程栽植嘴运动学特性和形成穴口的理想要求研究；非圆齿轮行星系植苗机构的构型综合和运动学特性研究，并提出变步长区间扩展法以快速求解满足理想要求的机构参数范围；建立该机构的动力学模型及评价准则；以评价准则为目标、以满足理想要求的机构参数范围为约束建立优化模型并进行参数优化。研制最佳的2~3种不同非圆齿轮行星系植苗机构并进行试验研究，以验证或修正所建立的模型。.本项目将建立植苗机构的系统研究平台，为开发新型高速移栽机提供技术支撑；并提出满足轨迹和姿态等要求的非圆齿轮行星系机构分析和设计方法，为研究其他用途的非圆齿轮行星系机构提供思路。

针对“零速度”移栽无法保证立苗率和传统植苗机构不能满足钵苗旱地高速移栽要求的问题，本项目提出通过保证栽植嘴理想运动学特性和形成理想穴口来提高立苗率和降低损伤率的新思路，并在该思路指导下提出非圆齿轮行星系植苗机构以保证高速植苗过程的高立苗率、低损伤率。. 内容包括：植苗过程栽植嘴运动学特性和形成穴口的理想要求研究；非圆齿轮行星系植苗机构的构型综合和运动学特性研究，并提出变步长区间扩展法以快速求解满足理想要求的机构参数范围；建立该机构的动力学模型及评价准则；以评价准则为目标、以满足理想要求的机构参数范围为约束建立优化模型并进行参数优化。研制最佳的2种不同非圆齿轮行星系植苗机构并进行试验研究，以验证或修正所建立的模型。.本项目建立了植苗机构的系统研究平台，为开发新型高速移栽机提供技术支撑；并提出满足轨迹和姿态等要求的非圆齿轮行星系机构分析和设计方法，为研究其他用途的非圆齿轮行星系机构提供思路。. 本项目已发表论文11篇，其中EI期刊8篇，一级学报10篇，授权发明专利5件、实用新型专利2件、计算机软件著作登记权8项，培养毕业博士生2名、硕士生5名。