水培阳台蔬菜机营养液电导率自适应控制  

Electrical Conductivity Adaptive Control of Nutrient Solution of Hydroponic Veranda Vegetable Machine

加关注

作  者:李颀[1] 高一星 王俊 杨柳 赵洁 LI Qi;GAO Yixing;WANG Jun;YANG Liu;ZHAO Jie(School of Electrical and Information Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区:[1]陕西科技大学电气与信息工程学院,陕西西安710021

出  处:《河南农业科学》2019年第1期153-159,共7页Journal of Henan Agricultural Sciences

基  金:陕西省农业科技创新工程项目(201806117YF05NC13(1));陕西省科技厅农业科技攻关项目(2015NY028).

摘  要:针对当前水培阳台蔬菜机营养液电导率(Electrical conductivity,EC)控制系统易受外界温度、湿度、光照强度和混合营养液中pH等因素干扰的问题,设计了营养液EC的模型参考自适应控制系统。基于物料守恒关系建立营养液EC控制系统数学模型,同时依据被控对象模型、响应时间和控制性能等指标选取参考模型,并采用李雅普诺夫稳定性原理设计系统的自适应律和控制律。仿真试验表明,系统可在40s左右进入稳定状态,同时在外界温度、湿度、光照强度、混合营养液pH等的扰动下,依旧具有较好的鲁棒性(控制绝对误差<0.1mS/cm)。The electrical conductivity(EC)control system of the hydroponic veranda vegetable machine nutrient solution is easily interfered by external temperature,humidity,light intensity and the pH of mixed solution,so the model reference adaptive control system of nutrient solution EC was designed.The mathematical model of EC regulation system of nutrient solution was established by the relationship of conservation of materials.Meanwhile,the reference model was selected by these indicators of the controlled object model,response time and control performance etc,and the adaptive law and control law of the system were designed by Lyapunov stability principle.The system simulation test showed that the system can enter the stable state of EC about 40 seconds under the disturbance of external temperature,humidity,light intensity and pH of the mixed solution.The system had a good robustness(absolute error was less than 0.1 mS/cm).

关 键 词:水培阳台蔬菜机 营养液 电导率 模型参考自适应 

分 类 号:S24[农业科学—农业电气化与自动化;农业科学—农业工程] S63

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象