STRUCTURAL AND FUNCTIONAL DIAGRAM OF THE DIGITAL TWIN OF THE TEST COMPLEX OF THE SPACECRAFT POWER SUPPLY SYSTEM BASED ON A MULTI-LEVEL COMPUTER MODEL

Relevance Space exploration with the help of automatic spacecraft — satellites for various purposes, deep space exploration devices, has been going on for decades. Despite this, even with the current level of reliability, spacecraft fail without having exhausted the entire period of active existence. The basic part, the so-called platform of the spacecraft, as a rule, consists of its life-supporting systems: a temperature control system, an orientation system, a propulsion system, an on-board computer control system. A failure in the operation of each of them leads to an emergency situation on board, but it is enough for any part of the power supply system to fail so that the device eventually turns out to be completely inoperable. In this regard, the power supply system of the spacecraft must be subjected to high-quality ground testing, undergo several stages of testing, from autonomous to complex as part of the spacecraft. In order to confirm the predicted reliability and operability of the spacecraft power supply system, the nominal and limit modes of its operation should be simulated in ground conditions. But, for obvious reasons, the use of on-board solar and battery batteries in ground conditions, as well as the entire complex of service and useful electrical loads, is difficult and ineffective. Therefore, in order to carry out a full-fledged ground experimental testing, a special class of control and verification equipment is used – hardware and software complexes that simulate the operating modes of the power supply system, consisting of simulators of solar, rechargeable batteries and onboard electrical load, automated connection control systems. Aim of research To bring the structure of the digital twin of the spacecraft power supply system and implement a computer model of the digital twin to automate the tasks of designing, developing and ground testing of the power supply system. Research methods The method of component circuits, methods of system analysis. Results The structure of the digital twin of the spacecraft power supply system is given. A computer model of a digital double has been implemented in the domestic environment of multilevel computer modeling of MARS. The digital twin was integrated into the test bench of the power supply system by interacting with real databases and a control computer Keywords: spacecraft power supply system, ground tests, control and verification equipment, battery simulator, solar battery simulator, electric load simulator, automation of the test process, digital twin