基于模型参考自适应的水肥一体化控制系统设计  

Design of Water and Fertilizer Integration Control System Based on MRAS

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作  者:张艳丽[1] 石统宇 孟庆祥[1] 张征征 邢晨泰 鲁振宇 ZHANG Yan-li;SHI Tong-yu;MENG Qing-xiang;ZHANG Zheng-zheng;XING Chen-tai;LU Zhen-yu(College of Mechanical Engineering,Jiamusi University,Jiamusi 154007,Heilongjiang Province,China)

机构地区:[1]佳木斯大学机械工程学院,黑龙江佳木斯154007

出  处:《节水灌溉》2024年第10期34-40,共7页Water Saving Irrigation

基  金:黑龙江省教育厅科研业务费基础研究项目(2019-KYYWF-1379);黑龙江省大学生创新创业训练计划项目(S202310222006)。

摘  要:针对水肥混合过程中水肥EC值精准控制的问题,设计一个基于模型参考自适应的水肥一体化决策和控制系统。建立母液动态调控模型,并通过该模型设计模型参考自适应控制器。仿真试验结果显示,模型参考自适应控制相较于模糊PID控制,在跟踪试验中超调量降低1.2%,调整时间减少12.6 s,阶跃试验中超调量降低14.4%,调整时间减少超过2 s,抗干扰能力优于模糊PID控制。通过3种方式进行田间试验,对比模糊PID控制和人工灌溉方式,采用模型参考自适应控制能够使番茄株高分别提高15.7%和35.6%,茎粗分别增长11.1%和18.6%,产量分别提升23.3%和48.1%,结果表明,模型参考自适应控制优于模糊PID控制和人工灌溉方式,从而验证模型参考自适应控制的有效性,为精准施肥灌溉提供技术支持。Aiming at the problem of precise control of water and fertilizer EC values during water and fertilizer mixing process,the paper presents a decision-making and control system for water and fertilizer integration based on model reference adaptive control.The mother liquor dynamic control model is established and the model reference adaptive controller is designed by it.The simulation test results show that compared to fuzzy PID control,the model reference adaptive control reduces overshoot by 1.2%and adjustment time by 12.6 seconds in the tracking test.In the step tests,the model reference adaptive control reduces the overshoot by 14.4%and the adjustment time by more than 2 seconds.In addition,the interference capability is better than fuzzy PID control.The field experiments are done in three ways.Compared to fuzzy PID control and manual irrigation and fertilization methods,the utilization of model reference adaptive control resulted in a 15.7%and 35.6%increase in tomato plant height,an 11.1%and 18.6%increase in stem thickness,and a 23.3%and 48.1%increase in production,respectively.The results show that model reference adaptive control is better than fuzzy PID control and manual irrigation methods,thus the paper proves the effectiveness of model reference adaptive control and provids technical support for precise fertilization and irrigation.

关 键 词:水肥一体化 模型参考自适应 控制系统 水肥混合动态模型 超调量 调整时间 

分 类 号:S275.6[农业科学—农业水土工程]

 

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