Modeling of Thermal Processes in Multichannel Radars in Heat-Stressed Operation Modes

During the functioning of modern radars in heat-stressed modes, there are risks of periodic automatic shutdowns of power amplification units. This fact is associated with overheating of the units. In order to prevent overheating and predict failures of the units, it is necessary to build a thermal model. This paper presents an original model for describing thermal processes in a radar with a dense arrangement of power amplification units. The dense arrangement of units leads to an uneven temperature distribution inside the electronic equipment, nonlinear dynamic interactions between the elements of the electronic equipment, and also to the anisotropy of the medium with respect to heat transfer processes. It is shown that the model allows to implement the mode of proactive control of the functional characteristics of a radar due to the low speed of operation. The main stages of the algorithm are proposed, which makes it possible to predict with high accuracy on a given horizon the temperature values of power amplification units and its failures due to overheating. Based on the results of modeling thermal processes, estimates of the potential capabilities of the radar during operation in heat-stressed modes are given.