Transparent, Flexible, and Stable Polyethersulfone/Copper-Nanowires/Polyethylene Terephthalate Sandwich-Structured Films for High-Performance Electromagnetic Interference Shielding

Machine learning-based surrogate modeling approaches for fixed-wing store separation

Analysis of aircraft-store compatibility for internal weapons separation

Longitudinal aerodynamic modeling and verification for air-launch-to-orbit system during stage separation

The invention relates to a wind tunnel test parameter determination method based on release and separation type wind tunnel free flight test similarity laws, and the release type wind tunnel free flight test similarity law is deduced according to dynamics and kinematics. According to different initial separation speeds, two types of simplified equations are obtained through reasonable simplification, so that the defect that the quality and the separation speed of the conventional similarity law wind tunnel model are completely limited is overcome, a relational expression between the model quality and the separation speed is obtained, and the machinability of the test model is guaranteed on the premise of guaranteeing that the separation characteristic is not changed. Meanwhile, the same test model can be applicable to different wind tunnel test states, the universality of the test model is improved, the trouble of machining different test models for the respective test states is avoided, meanwhile, the machining cost of the wind tunnel test model is reduced, and the preparation period of the wind tunnel test is shortened.

Wind tunnel test parameter determination method based on release and separation type wind tunnel free flight test similarity laws

Influence of control device on store separation from an open cavity

A method and system to predict an aircraft separation trajectory for high-speed wind tunnel delivery model test are provided. By introducing a formula correction process, vertical acceleration insufficiency inherent to a delivered object model in high-speed wind tunnel delivery model test that employs a lightweight model process is compensated; the problem is avoided that vertical displacement ofa delivered object model is differed from that of a real object due to deviation of a model delivery trajectory to a real object trajectory, wherein the deviation is caused by disproportion of vertical displacement to horizontal displacement of the model during falling , and the disproportion is caused by insufficiency of vertical acceleration of the delivered object model due to the use of the lightweight model process; therefore, accurate prediction is provided for multi-body separation safety and separation trajectory of high-speed aircrafts. The method and system have the advantages that vertical acceleration can be compensated with no need for additional test mechanisms, the method and system feature simplicity, feasibility and low test cost, and high compensation precision is achieved since the problems related to error and precision of a compensation test mechanism and the like are avoided.

Zenghui Jiang

Papers

Influence of control device on store separation from an open cavity

Method and system to predict aircraft separation trajectory for high-speed wind tunnel delivery model test