Open channel sluice model prediction control method based on Saint-Venant equation set

The invention discloses an open channel sluice model prediction control method based on a Saint-Venant equation set, and the method comprises the steps: S1, describing a mathematical model of an open channel hydrodynamic process based on the Saint-Venant equation set, and obtaining a continuous difference equation set based on the Saint-Venant equation set; s3, describing gate flow under different flow states based on a bulkhead gate equation set and a Taylor expansion; s4, constructing an open channel system optimization control objective function and constraint conditions, describing an open channel system optimization problem, and solving an objective function equation; s5, solving the derivative of the open channel system optimization control objective function and the derivative of the equality constraint; and S5, on the basis of the objective function equations, the objective function derivatives and the equality constraint derivatives in the steps S4 and S5, providing a control strategy of the gate in