排灌机械工程学报2012，Vol.30Issue(4)：473-478,6.DOI:10.3969/j.issn.1674-8530.2012.04.019
变雨强人工模拟降雨自动控制系统设计与试验
Design and test of automatic control system of artificially simulating rainfall with variable intensity
摘要
Abstract
For artificially simulating rainfall with variable intensity in laboratory, a linear relation between the simulated rainfall intensity and the frequency of flow rate, and that between the frequency and the regulating voltage of electric actuator were established through analyzing the performance parameters of the actuator; subsequently, an automatic control system for such a simulation was designed based on the flow rate regulation of water supply. An automatic control algorithm with variable time-step was proposed based on the LabVIEW language and then applied into gradation control on the water supply in the artificial rainfall system by analyzing the performance parameters of signal acquisition equipment and the voltage-mechanical sensitivity of electric actuator. The voltage-mechanical sensitivity of electric actuator was 0.2 mm/V, and the minimum control accuracies of frequency of water supply flow rate and rainfall intensity were 7 Hz and 0.053 mm/min, respectively. The experimental results indicated that the relative error between the rainfall intensity achieved and the designed one is less than 4% ; the fidelity and the stability of simulated rainfall intensity is above 0. 98; the spatial homogeneity coefficient of rainfall intensity is above 0.97; the linear correlation coefficient of rainfall intensity is above 0.75.关键词
人工模拟降雨/渐变降雨模拟/电动执行器/涡轮流量计Key words
artificial rainfall simulation/variational rainfall simulation/electric actuator/ turbine flowmeter分类
农业科技引用本文复制引用
周奇,岑国平,张亮,陈太红..变雨强人工模拟降雨自动控制系统设计与试验[J].排灌机械工程学报,2012,30(4):473-478,6.基金项目
军队科研基金资助项目(KH0706045) （KH0706045）
