二次不等幅摆动特性的旋转式取苗机构机理分析与优化设计研究

项目名称： 二次不等幅摆动特性的旋转式取苗机构机理分析与优化设计研究

项目编号： No.51205361

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 赵雄

作者单位： 浙江理工大学

项目金额： 25万元

中文摘要： 目前旱地移栽机人工喂苗效率低，日本自动取苗机构结构复杂、效率不高，申请者分析现有取苗机构工作原理发现旋转式取苗机构形成"鹰嘴形"取苗轨迹是周期二次不等幅摆动规律，本项目拟针对取苗机构轨迹、姿态及力学性能要求，开展二次不等幅摆动特性的两级非圆齿轮行星系旋转式取苗机构优化设计研究。建立机构的传动比求解模型，探索传动比函数设计准则，研究输出轨迹约束下姿态控制方法。针对二次不等幅摆动特性的旋转式取苗机构复杂的多目标多参数优化问题，研究参数导引优化方法，实现最佳取苗轨迹和姿态。在机构动态仿真分析与虚拟试验基础上设计取苗机构，最后通过台架试验分析取苗效果与测试相关参数，完善结构设计，并修正理论模型。 本项目的成功实施，将为我国高效的旱地自动移栽机的研发提供技术支撑，针对具有复杂输出规律的非圆齿轮行星系传动的设计方法和多目标优化问题的参数导引优化方法对于具有较高运动要求的机构设计具有借鉴意义。

中文关键词： 钵苗移栽机；取苗机构；非圆齿轮；优化设计；行星轮系

英文摘要： Manpower seedling-feeding transplanter of unirrigated farmland is low efficiency at present, while Japan's automatic seedling pick up mechanism is characterized by complex structure as well as low efficiency. The working principle of existing seedling pick-up mechanism is analyzed, and it's found out that Olecranon-shaped trajectory formed by rotary seedling pick up mechanism possesses periodic quadratic unequal amplitude swinging characteristics. The project is intended to take the requirements of the trajectory, posture and mechanical properties of seedling pick-up mechanism into consideration. Seedling pick-up mechanism is constructed by two-level non-circular gear planetary system. Then optimize design of rotary seedling pick-up mechanism with quadratic unequal amplitude swinging characteristics is launched. Solving model of mechanism transmission ratio is established to explore the design criteria of the transmission ratio function and to research into posture control method constrained by output trajectory. Considering that rotary seedling pick-up mechanism with periodic quadratic unequal amplitude swinging characteristics has the optimization problem of multi-target and multi-parameter, parameters guided optimization methods are studied to achieve optimal seedling pick-up trajectory and posture. Seedling

英文关键词： Seedling Transplanter；Seedling Pick-up Mechanism；Non-circular Gears；Optimal Design；Planetary Gear Train