Adaptive Algorithms for Evaluating the Effect of Microdynamics on Crystal Growth Parameters in the Information-Control Technological Module of SEMS in Microgravity

Problem statement: despite half a century of experience in growing semiconductor crystals in space, no one in the world has yet managed to obtain crystals superior to the best terrestrial analogues. The reason for this is the statistical uncertainty and limited observability of crystal growth processes carried out on board spacecraft. In this regard, the question arose about the creation of an on-board information-control technology module (OBICTM) SEMS for growing high-quality crystals in microgravity conditions, capable of also performing the function of an on-board expert. This approach will improve the quality of the materials obtained by carrying out thermophysical processes, such as crystal cultivation, taking into account the recommendations from the on-board expert, issued in real time. The absence of such systems inevitably leads to the accumulation of raw scientific information from the director of the experiment about the course of the process on board the spacecraft. However, their creation requires solving a number of important tasks, one of which is the ability of OBICTM SEMS to carry out an operational assessment of the impact of vibration on the parameters of crystal growth in real time. Purpose of research: to solve the problem of operational measurement of the frequencies of microdynamic influences that affect the crystal growing process on board the spacecraft during the formation of control commands in the OBICTM SEMS, it is necessary to develop a new method and appropriate algorithms. Results: to achieve this goal, an adaptive algorithm for evaluating the effect of vibration on crystal growth parameters in real time in relation to OBICTM SEMS has been developed, and numerical simulation results have been obtained. To verify the developed adaptive algorithm and simulate OBICTM SEMS, a stand was made that simulates the conditions of cosmic microdynamics during crystal growth. Practical significance: the developed adaptive algorithms for evaluating microdynamics can be used as part of OBICTM SEMS for grow high-quality crystals in microgravity and provide the opportunity to obtain the necessary information on the basic physical parameters of the thermophysical process. The processed information will make it possible to deepen fundamental knowledge in the field of space materials science and improve existing technological processes on this basis.