基于时变非线性特征和状态变量的农田灌溉节水控制方法

常规的农田灌溉节水控制，主要采用影响因子分析模拟农田灌溉精度得出农田灌溉节水控制方案，忽略了实际农田土壤的液限和塑限变量对控制方案造成的影响，导致节水控制结果的节水系数较低。提出了基于时变非线性特征和状态变量的农田灌溉节水控制方法。该方法计算农田土壤的基础参数分析时变非线性特征，根据分析所得的特征计算约束条件，建立目标约束函数，构建出农田灌溉的节水控制模型，计算农田土壤液限和塑限的状态变量重新演化模型的目标约束条件，得出最终的农田灌溉节水控制方案。试验结果表明，所提方法应用后得出的节水控制结果，表现出节水系数较高，均值达到0.477，节水效果较好，满足农田灌溉的现实应用需求。

Water-saving control method for farmland irrigation based on time-varying nonlinear characteristics and state variables

Conventional water-saving control for farmland irrigation mainly uses impact factor analysis to simulate the accuracy of farmland irrigation to obtain a water-saving control plan for farmland irrigation, ignoring the impact of the actual liquid limit and plastic limit variables of farmland soil on the control plan, resulting in a low water-saving coefficient of the water-saving control results. Therefore, a water-saving control method for farmland irrigation based on time-varying nonlinear characteristics and state variables is proposed. Calculate the time-varying nonlinear characteristics of the basic parameters of farmland soil, calculate the constraint conditions based on the analyzed characteristics, establish a target constraint function, and construct a water-saving control model for farmland irrigation. Calculate the target constraint conditions of the state variables of farmland soil liquid limit and plastic limit to re evolve the model, and obtain the final water-saving control plan for farmland irrigation. The experimental results show that the water-saving control results obtained after the application of the proposed method exhibit a high water-saving coefficient, with an average of 0.477. The water-saving effect is good and meets the practical application needs of farmland irrigation.