Modeling and ipid method of a hypersonic vehicle aerodynamic thermal ground simulation system

Abstract

The invention discloses a hypersonic vehicle aerothermal ground simulation system modeling and iPID method, including, according to the law of energy conservation, establishing an input and output energy conservation equation of the hypersonic vehicle aerothermal ground simulation system; based on an AC voltage regulating circuit, establishing a high The input electric energy expression of the aerothermal ground simulation system of a supersonic vehicle; using thermodynamics and heat transfer, the establishment of the output electric thermal energy expression of the hypersonic vehicle aerothermal ground simulation system; combining the input electric energy expression and the output electric thermal energy expression , establishing a control model of the input electric energy and output temperature of the hypersonic vehicle aerothermal ground simulation system; reducing the order of the control model to obtain the iPID controller of the hypersonic vehicle aerodynamic thermal ground simulation system to complete target tracking. The control algorithm of the invention is clearer, the control precision is more precise, and all disturbances can be observed by a time-delay observer.

Description

technical field [0001] The invention relates to the technical field of aerospace automation, in particular to a hypersonic vehicle aerodynamic thermal ground simulation system modeling and an iPID method. Background technique [0002] When the flight speed of the aircraft reaches hypersonic speed (Mach number is greater than 5), the surface of the aircraft will have severe friction with the airflow, and a large amount of heat energy will be generated, causing the wall temperature of the aircraft to rise sharply. This is the so-called aerodynamic heating process. The high surface temperature of the aircraft will not only affect the normal operation of the aircraft, but also pose a certain threat to the safety of the fuselage structure and the stability of the internal electronic equipment. failure under certain conditions; in consideration of economical and aircraft speed reasons, the same material cannot be used on the surface of the aircraft, and it is necessary to accurate...

AI Technical Summary

Problems solved by technology

[0003] Ground thermal environment tests mainly include wind tunnel tests and non-contact radiant heat tests. The design of wind tunnels with too high Mach number is difficult, the accuracy of simulation and measurement is not high, the cost is high, and there is interference. In non-contact radiant heat tests, quartz As a radiant heat element, the lamp has the characteristics of small thermal inertia, long life, high temperature, and safe use; nowadays, most of the radiant heat tests with quartz lamps as heating elements are based on the design of controllers without system mathematical models, which are completely based on empirical formulas. Systematic analysis, there is a contradiction between improving control accuracy and decision-making speed, and real-time control cannot be achieved. There are common problems such as low control accuracy and poor anti-interference ability, and it is impossible to ensure that the system can stably track the desired temperature.

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