Numerical study of three-dimensional unsteady thermal fields of aerospace high-precision sensors and system

The application of the method of thermal balances to the modeling of three-dimensional non-stationary temperature fields of precision sensors and devices are considered. The algorithms constructed using the thermal balances method make it possible to calculate the temperature fields of the device considering the specific features of its design and operating conditions - high-frequency vibrations, shock loads, vacuum, zero gravity. Such modeling allows solving some critical problems at the design stage, for example, the problem in providing comfortable conditions for the functioning of precision aerospace devices from the thermal point of view. The mathematical model of the thermal balances method for high precision sensors and system and algorithm for calculating temperature fields are given in the article. The application of the thermal balances method to the study of temperature fields in precision sensors and systems was considered using the example of the angular velocity measuring unit with fiber optic gyroscopes and the electronic board of the nanosatellite payload module.