摘要
针对果园常见的单株生长的较粗难切割的杂草,设计割草机的专用喂草导向装置。联合CREO和ADAMS建立喂草导向装置与杂草的刚柔耦合模型,并对杂草在喂草导向装置喂草口角度和前进速度不同的情况下的运动规律进行分析。根据杂草顶端点在空间坐标系中X、Y、Z轴方向上的位移变化相关关系获得杂草的偏移夹角、割草机的理论最大割幅和割茬偏移等3个重要指标,来表征喂草导向装置的工作效果。使用Design-Expert10.0进行试验设计,试验结果表明,最优的方案为:喂草口角度为80°、机器前进速度为1330mm/s,此条件下喂草导向装置的工作效果良好,割茬平整,最大偏移量为27.02mm。
A special grass-feeding guide device for the disc lawn mower was designed for the coarse and difficult-to-cut weeds that are commonly grown in the orchard. Combined with CREO and ADAMS,the rigid-flexible coupling model of grass-feeding guides and weeds was established,and the movement laws of weeds in the case of grass-feeding guide device with different angles and advance speeds were analyzed. According to the relationship between the displacement of the weed tip point in the X , Y and Z directions of the space coordinate system,three important indicators including the offset angle of the weed,the theoretical maximum cutting width of the mower and the cutting offset were calculated to characterize the working effect of the grass-feeding guide device. Using Design-Expert 10.0 software,a comprehensive test was designed,and the response surface effects of the three indicators were analyzed,and the experiments were verified and compared. The results showed that the optimal angle of the grass-feeding port was 80°,with the machine forward speed of 1 330 mm/s. At this time,the grass-feeding guide device worked well with flat cutting and the maximum offset of 27.02 mm.
作者
张雯
张衍林
李善军
孟亮
常钧翔
王凤武
ZHANG Wen;ZHANG Yanlin;LI Shanjun;MENG Liang;CHANG Junxiang;WANG Fengwu(College of Engineering,Huazhong Agricultural University/Key Laboratory of Agricultural Equipment in Mid-Lower Yangtze River,Ministry of Agriculture and Rural Affairs,Wuhan 430070,China)
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2019年第4期134-142,共9页
Journal of Huazhong Agricultural University
基金
现代农业(柑橘)产业技术体系建设专项(CARS-27)
关键词
圆盘式割草机
导向装置
运动学仿真
参数优化
disc lawn mower
grass-feeding guide device
dynamic simulation
parameter optimization
