Carry out tests on aviation/aerospace onboard products, such as flight control systems, aircraft fuel systems, electrical systems, satellite communication systems, and other parts and components, as well as single machine and component tests, subsystem tests, and full system tests. Gradually transitioning from simple low-level experiments to complex high-level experiments During the design process, simulation experiments are conducted using both analog and digital computers (sometimes combined with partial physical objects) to assist in the selection of optimal parameters and solutions for various subsystems and the entire system of the aircraft