Abstract The paper discusses issues involved in mission control of the International Space Station (ISS), in particular, specific aspects of monitoring and evaluating the status of Power Supply Systems (PSS) and solar arrays (SA) as their components. Power budget simulations use as their initial computational parameter the current SA performance, which is determined on the basis of a special performance evaluation mode. The obtained data make it possible to take into account the spaceflight factors resulting in performance degradation. Besides that, when using the SA performance evaluation mode as a method for periodically checking the SA status, the more accurate determination of the actual SA performance involves taking into account the shadowing of the photovoltaic cells, the effect of the light reflected off the Earth surface, and current generation resulting from illumination of both the front and the back surfaces of the SA. The paper presents the results of space experiment Albedo carried out onboard the Russian Segment (RS) of the ISS, which included development of techniques for taking into account the above factors when simulating the PSS power budget for the Service Module (SM) Zvezda. Developed as a result of carrying out the space experiment was a procedure for determining SA performance and simulating the power input from the ISS RS SM SA taking into account the Earth albedo; recommendations were made for the orbital spacecraft PSS control modes taking into account the possibility of power generation from the Earth outgoing light flux. Based on the results of testing the developed computational schemes for evaluating the SA performance and simulations of incoming power that take into account the Earth albedo, substantiated values were obtained for the proposed reference parameter for evaluating the ISS RS SM SA. The developed procedure provides the most accurate performance evaluation for both front and back surfaces of the SA. Computational schemes for predicting incoming power proposed within the framework of the procedure make it possible to give highly accurate predictions of incoming power using precise simulations of light flux coming from Earth, as well as to determine the contribution of variable components into the SA performance determined during a periodic SA performance estimate.
Highlights Solar arrays current as the sum of the front and back solar arrays sides components. Solar arrays current as the sum of Sun and emissions coming from Earth components. Prediction models of incoming electric power characterized by Earth albedo accounting features. Current generation coefficients are found by function minimizing by Newton-Gauss method.
Evolution of the performance monitoring techniques for solar arrays of the service module Zvezda within the ISS Russian segment over the course of its orbital flight
Acta Astronautica ; 198 ; 680-688
2022-06-28
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Solar arrays , Electric power input , Albedo , Mathematical modeling , International space station , BRF , bidirectional reflectance function , ERS , Earth Remote Sensing , ESO , equilibrium solar orientation , ISS , International Space Station , MID , mean integral deviation , OCS , Orbital Coordinate System , OCS-R , Rotated Orbital Coordinate System , PSS , Power Supply System , PVC , photovoltaic cell , RS , Russian Segment , SA , solar arrays , SB , storage batteries , SC , spacecraft , SEVIRI , Spinning Enhanced Visible and IR Imager , SM , Service Module , StD , std. deviation , TIM , Total Irradiance Monitor , TM , telemetry , TMI , telemetric information , US , United States , USOS , US orbital segment
Zvezda to follow Proton success
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