Wind tunnel main injection pressure subsection control method and system

The invention relates to the technical field of aerospace craft ground simulation tests, and discloses a wind tunnel main injection pressure subsection control method and system.The method comprises the steps that firstly, a main pressure regulating control model is built based on pressure regulating valve pressure characteristics and historical data of test control parameters; carrying out segmented control on the main lead in the test process; wherein the subsection control comprises main injection open-loop control, main injection closed-loop regulation and disturbance compensation control, the main injection open-loop control is carried out, and the disturbance compensation control quantity is obtained through calculation of a main regulation pressure control model and represents the main injection pressure. The problems that in the prior art, due to the fact that main adjustment initial preset parameters excessively depend on post personnel experience, steady-state deviation is large, adjustment time is