摘要
构建了以电动调节阀为变流器件的变量喷雾系统,并采用试验方法得出了系统的阶跃响应特性,试验结果表明:在阶跃幅值ΔQ分别为0.4、1.4、3.4、3.9、4.4 L/min条件下,系统上升时间的最大值为1s,表明系统响应速度与现有的调压变量喷雾系统相当;系统上升时间、峰值时间和超调量都有幅值相关性,说明系统是非线性系统。因此对此类调流变量喷雾系统,其控制设计必须考虑非线性问题。
In order to develop a new type of precision spraying equipment,a set of variable-rate spray system based on electric control valve device as a converter was developed,and the step response characteristics of the system were studied by using experimental methods.The result shows that the maximum rise time is 1 s in the condition of step amplitude ΔQ=0.4,1.4,3.4,3.9,4.4 L/min,which is comparable with variable-rate spray system controlled by changing flow press; the rise time,peak time and overshoot show correlation with the amplitude,which indicates that the system belongs to nonlinear system.So the control design of this type of variable-rate continuous spray system must take nonlinear problems into account.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2010年第9期32-35,79,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家"863"高技术研究发展计划资助项目(2008AA100905
2006AA10A305-3
2008AA100901)
国家自然科学基金资助项目(30571240)
关键词
喷雾
变量技术
响应特性
非线性
试验
Spray
Variable-rate technology
Response characteristics
Nonlinear
Experiment
