基于CATIA与ADAMS的精密播种机联合仿真

A Study on a Small-sized Precision Planter

精密播种技术依赖于精密播种机械。安徽省多丘陵山区地带,农作物种类多,对精密播种机械需求更为迫切。为此,对一种典型的手推式单行株距可调精密播种机的结构和运动特性进行研究。首先基于CATIA软件建立了整机三维模型,分析了其窝眼式排种器、双链联合传动、两种播种株距的调节方式,然后通过Parasolid格式将其导入到ADAMS软件中进行多体动力学分析。通过对排种器等动力学仿真表明:所建模型准确,运行可靠;搭建的联合仿真平台可进一步分析土壤和播种机结构等因素对播种效率的影响,从而优化结构以提高播种机适应性,为研究小型精密播种技术奠定了基础。

Precision sowing technology plays a significant role in farming for these areas of hills and multiple seeds, especially for Anhui province where the requirement for the precision seeder is more urgent. This paper studies the structure and dynamic performance of a typical hand-push precision seeder whose row spacing is adjustable. Firstly, the 3-D model was built in CATIA, and the metering device of nest-eye wheel, the double-chain transmission mode, and the two adjustment methods of row spacing were analyzed respectively. Then, the model was imported into ADAMS in parasolid format in order to analyze its multi-body dynamics performance. The dynamics simulation in ADAMS indicated the accuracy and reliable of the simulation model. The co-simulation platform provides an effective means to study the influence factors on sowing efficiency, such as soil, seeder structure, and to optimized design to improve the seeder＇ s adaptability. This study laid the foundation for research on small-scale precise seeding technique.