摘要
建立了农用轮式拖拉机三点悬挂杆件系统的数学模型,通过运动学与几何分析,得到了提升过程中农具处提升力的计算方法。介绍了准整型浮动随机实验法,相比于以往应用于悬挂机构几何参数优化的若干方法,浮动随机实验法使用方便,且更能适应多变量、多约束条件的特点。针对某型号拖拉机提升力不足的问题,以改善提升能力为优化目的,悬挂杆件各几何参数为优化变量,结合国家标准规定和拖拉机实际使用情况确定约束条件,对悬挂系统的几何参数进行了优化设计。优化后提升能力有很大改善,说明这种优化方法可行有效。应用到工程中,结合工况和设计需求能够给出相应的优化方案。
Mathematical model of a three-point hitch for agricultural wheeled tractors is established, through kinematics and geometric analysis, the method of calculating lifting force during upgrade process is obtained. Floating random test is introduced, comparing with other optimization, it could be used expediently and adapt to muhivariable, multi-constraint problem better. An example to overcome the lifting shortage of some kind of tractor is discussed. The geometrical parameters of a hitch are taken as optimization variables and constrains are defined by national standards and usage. After optimization, the objective function has been improved greatly, so this method is proved effective. Applying to engineering application, the optimization may be proposed with the need of design and operating conditions.
出处
《中国农机化学报》
北大核心
2014年第3期119-123,共5页
Journal of Chinese Agricultural Mechanization
基金
国家自然科学基金项目(10972105)
关键词
优化设计
拖拉机悬挂
浮动随机实验法
多变量
多约束
提升力
optimization
tractor hitch
floating random test
multi-variable
multi-constraint
lifting force
