Comparative analysis of methods for regulating the frequency characteristics of simulators of electrical characteristics of spacecraft power supply systems

One of the main systems of a spacecraft (SC) is the power supply system (PSS). The basis of PDS are secondary power sources (SPS), which use various methods of controlling and converting electricity, which leads to significant differences in their dynamic properties. From the side of on-board consumers, the dynamics of the power transmission system is determined by the total internal resistance (impedance) of the VIP. When conducting ground electrical tests of spacecraft ETS, due to the complexity of using power supply systems, test complexes are used, the basis of which is simulators of electrical characteristics of electric power transmission systems (EPTS). Modern ISPS use a modular configuration principle, which makes it possible to produce EPTS of different powers, but energy modules have fixed or adjustable impedance frequency characteristics over a narrow frequency range, which leads to a limitation of the types of simulated PSPS. Equipping the EPTS with the property of regulating frequency characteristics in a wide frequency range expands the functionality of the EPTS, as it allows you to simulate the dynamic properties of the PSEP containing different types of VIPs. The purpose of the work is to study and comparative analysis of three methods for regulating the impedance frequency characteristics (IFC) of the EPTS module. Methods for regulating the frequency response of an EPTS are considered on the basis of its generalized functional diagram containing mathematical models: amplifier-adder (AS), serial correction device (CU), power amplifier (PA), voltage divider (DN) and load (L). The article analyzes options for regulating the impedance frequency characteristics of EPTS, and considers three methods for regulating the IFC: two with a passive correction device and one with an active CU. The paper presents a simulation model in the MicroCap package of the electrical circuit of the EPTS module, and computational experiments have been carried out on each method of regulating the IFC of the EPTS. Based on the results of the study, a method for correcting and regulating the IFC of the EPTS is recommended, which makes it possible to separately regulate the low-frequency and mid-frequency regions of the IFC, which makes it possible to significantly simplify the configuration and provision of the IFC of the EPTS in accordance with the specified requirements.