Thermal characteristic simulation and emulation prediction system and method of stratospheric airship load cabin electronic equipment

Abstract

The invention provides a thermal characteristic simulation and emulation prediction system and method of stratospheric airship load cabin electronic equipment. A low-temperature and low-pressure chamber is combined with a flight envelope environment simulation parameter control operator controller; dynamic change simulation of an external atmospheric environment during a whole flight phase of a stratospheric airship can be extremely conveniently realized according to input of a flight envelope; unknown parameters of a stratospheric airship load cabin thermal network model are divided into relatively fixed parameters and parameters changed along flight heights H, and two-stage type model parameter identification is carried out; identification convergence and identification precision of an identification result are improved; a relatively fixed parameter identification result is used as priori knowledge of the next identification process, so that the precision of the later stage of parameter identification is remarkably improved. An identification result of convective term parameters of the second stage of parameters is fitted into a function relation of the flight heights H so that the predication precision of equipment temperature under different flight profiles is effectively improved; aiming at the parameter identification with a single equation cycle, the identification convergence of the parameters and the parameter identification accuracy are greatly improved.

Description

technical field [0001] The invention relates to a system for simulating and simulating and predicting the thermal characteristics of electronic equipment in a load compartment of a stratospheric airship, which is suitable for the experimental simulation of the thermal characteristics of the electronic equipment compartment in the load compartment of this type of aircraft, the identification of model parameters, and the temperature response and analysis of the temperature of electronic equipment during the entire flight phase. Simulation predictions. Background technique [0002] The adjacent space has a large altitude range and a complex environment. The characteristics of air pressure, air temperature, wind flow, and even radiation are significantly different at different altitudes, and are also extremely complicated. The thermal environment analysis of near-space vehicles is closely related to the thermal control scheme, and occupies a pivotal position in the design and re...

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Problems solved by technology

Although this method can support fast dynamic thermal analysis, this method has extremely strong rigid characteristics and needs to know all physical parameters in advance. In practical applications, it is almost impossible to obtain all physical parameters, resulting in deviations between this method and the actual temperature node prediction. Large, not convenient for practical application

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