ANISOTROPIC MODEL OF THE SYSTEM FOR MONITORING AND CONTROLLING THE THERMAL PARAMETERS OF BOARD RADIO MODULES

Abstract

Background. In accordance with the modern doctrine of the development of the latest rocket and space technology, the control and management of systems of onboard radio-electronic equipment is extremely important. Increasing requirements for reliability and increasing the density of deployment of radio-electronic means for various purposes, especially on-board equipment, significantly limits the possibility of heat removal using ventilation and convection in multi-level radio-electronic modules. At the same time, the conductive method of heat removal involves the use of thermal maintenance systems, special heat-exchange materials for sealing elements of radioelectronic devices. In many cases, an unbalanced temperature regime leads to an increase in the error of the sensors, which leads to a violation of the stability of the entire complex of rocket and space technology. The aim of the study is to analyze and develop mathematical models of heat transfer processes in radio-electronic modules that have analytical solutions. Materials and methods. A mathematical model for the analysis and provision of the thermal regime in radioelectronic modules in the form of a quasi-homogeneous anisotropic parallelepiped with stationary volumetric or flat heat sources placed in a conditional environment with a stable temperature is proposed. Results and conclusions. This approach makes it possible to implement the following procedures: complex spatial arrangement replacement of heat sources with simpler ones; multicomponent subsystems with a heterogeneous structure are replaced by quasihomogeneous regions with effective values of heat transfer properties; spatial arrangement of quantities describing heat transfer processes at the edges of areas replaced their average values. The proposed approach makes it possible to significantly simplify the calculated value of the temperature and these models can be widely used to calculate, measure and analyze thermal regimes in radio-electronic modules with a high density of radio-electronic equipment and are a convenient tool for thermophysical design and ensuring stable operation of on-board radio equipment of rocketspace and special equipment.

Keywords

• anisotropic model
• board radio modules
• thermal management