Analysis of the Significance of the Influence of Various Components of the Disturbance from a Temperature Shock on the Level of Microaccelerations in the Internal Environment of a Small Spacecraft

2021 ◽  
Vol 33 (2) ◽  
Author(s):  
A. V. Sedelnikov ◽  
D. I. Orlov
Keyword(s):  
Internal Environment ◽  
Temperature Shock ◽  
Small Spacecraft

Evaluation of the Effect of the Difference between the Real Attachment Unit and the Sealing in the Study of the Stress-Strain State of the Solar Panel of a Small Spacecraft as a Result of a Temperature Shock

2022 ◽  
Vol 904 ◽  
pp. 27-33
Author(s):  
A.V. Sedelnikov ◽  
V.V. Serdakova
Keyword(s):  
Strain State ◽  
Scientific Paper ◽  
Longitudinal Force ◽  
Solar Panel ◽  
Stress Strain ◽  
Temperature Shock ◽  
Small Spacecraft ◽  
Stress Strain State ◽  
Solar Radiation Flux ◽  
The Difference

The author of this scientific paper studies the stress-strain state of the solar panel of a small spacecraft after a temperature shock. The temperature shock is caused by the entry or exit of a small spacecraft into or out the Earth's shadow. In this work is considered a one-dimensional model of thermal conductivity. It is assumed that the solar radiation flux falls properly on the solar panel. Violation of normality due to deformations is neglected. A special feature of this work is to take into account the actual fixing of the solar panel. The boundary conditions in the form of a seal are preserved. However, the mobility of the smallest spacecraft is taken into account as a result of the occurrence of a longitudinal force in the solar panel during a temperature shock. The results are compared with the simulation data without taking into account the mobility of the small spacecraft. The results of this work can be used in the design of small spacecraft for technological purposes to meet the requirements for microaccelerations.

MODELING THE INFLUENCE OF A TEMPERATURE SHOCK ON THE MOTION OF A TECHNOLOGICAL SPACE VEHICLE

2020 ◽  
Author(s):  
Denis Orlov
Keyword(s):  
Space Vehicle ◽  
Technological Equipment ◽  
Temperature Shock ◽  
Small Spacecraft ◽  
Technological Processes ◽  
Technological Space

The article is devoted to solving the problem of assessing additional microaccelerations arising as a result of a temperature shock when a small spacecraft leaves the Earth's shadow and dives into it, in order to develop recommendations for controlling the level of microaccelerations in the area of technological equipment intended for the implementation of gravitationally sensitive technological processes on board. small spacecraft

Modeling the temperature shock of elastic elements using a one-dimensional model of thermal conductivity

2020 ◽  
pp. 2050060
Author(s):  
D. A. Belousova ◽  
V. V. Serdakova
Keyword(s):  
Thermal Conductivity ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Temperature Shock ◽  
One Dimensional ◽  
Small Spacecraft ◽  
Proposed Model ◽  
Direct Approximation ◽  
Elastic Elements

This paper considers the task of evaluating micro-accelerations arising due to the temperature shock of large elastic elements when a small spacecraft leaves the Earth’s shadow. In this case, a one-dimensional model of thermal conductivity is used. Its solution was obtained by the method of direct approximation with the construction of difference schemes. It is shown that the accuracy of estimating micro-accelerations is commensurate with the accuracy of solving by a three-dimensional model of thermal conductivity. The proposed model allows reducing the time to obtain estimates and significantly simplifies the task at hand. The results of the work can be used in the formation of the dynamic characteristics of a small spacecraft for technological purposes.

Daylight in Underground Spaces

2018 ◽  
pp. 156-161
Author(s):  
Alexei K. Solovyov
Keyword(s):  
Light Guide ◽  
Heat Losses ◽  
Internal Environment ◽  
Method Of Calculation ◽  
Natural Lighting ◽  
Different Depths ◽  
The Common ◽  
Different Diameters

Underground spaces in town centres present a big attraction for investors. However, they put special requirements to the internal environment. Those requirements can be fulfilled by means of daylighting. Examples of lighting of underground spaces are discussed. It is shown that the common systems of natural lighting are not always possible to use and cause big heat losses. Hollow light guide pipes allow avoid the shortcomings of common daylight systems. Method of calculation of daylight factors from hollow light guide pipes is shown. The results of calculation of daylight factors under the light guide pipes of different diameters in the different depths are presented.

Fractography, Fracture Toughness and Structural Turbulence Under Low-Temperature Shock Loading of a Nonequilibrium Titanium Alloy Ti–6Al–4V

2020 ◽  
Vol 55 (5) ◽  
pp. 633-642
Author(s):  
I. V. Vlasov ◽  
V. Ye. Yegorushkin ◽  
V. Ye. Panin ◽  
A. V. Panin ◽  
O. B. Perevalova
Keyword(s):  
Fracture Toughness ◽  
Titanium Alloy ◽  
Low Temperature ◽  
Shock Loading ◽  
Temperature Shock ◽  
Structural Turbulence

Features of sanitary and hygienic characteristics of silvinite complexes

2020 ◽  
pp. 57-62
Author(s):  
E. Ryazanova ◽  
V. Barannikov ◽  
V. Khokhryakova ◽  
L. Kirichenko ◽  
S. Selivanova
Keyword(s):  
Video Camera ◽  
Treatment Center ◽  
Internal Environment ◽  
Radiation Background ◽  
Medical Environment ◽  
Light Levels ◽  
Salt Complex ◽  
Radio Equipment ◽  
Environment Noise ◽  
Medical University

Currently, medical technologies based on natural factors are widely used in practical health care, including the effect of the medicinal properties of the mineral silvinite (natural potassium salts of the Verkhnekamsk Deposit) on the patient’s body. However, there is no regulatory framework for sanitary control of such devices. The aim of the study was to develop methodological approaches to the hygienic assessment of silvinite complexes. The analysis of the current regulations used in carrying out hygienic supervision and preventive measures in the salt structures that are part of the silvinite complexes is carried out. Based on long-term hygienic studies of silvinite structures by the salt treatment Center of Perm medical University. academician E. A. Wagner together with LLC NPK «Medical climate» (Tchaikovsky) developed and implemented sanitary and hygienic requirements for the created salt complexes. It is a complex of structural divisions, including the place of stay and treatment of patients, as well as the salt device. All units must meet the requirements of current sanitary rules and regulations. It is necessary to conduct a thorough survey of the location of the future salt complex. Optimal conditions of the internal environment in silvinite structures are determined by a special air preparation system consisting of air conditioning and cleaning of the external air using a filter-saturator. The special hygienic requirements of the sylvinite furniture in the room, the decoration of walls, ceilings and floors. The room must be equipped with radio equipment and a video camera for monitoring patients. Full expanded hygienic control of the parameters of the medical environment of silvinite premises should be carried out at least once a year according to the following indicators: microclimate parameters, content of multicomponent fine salt aerosol, aeroionic composition of the air environment, radiation background, microbial contamination of the internal environment, noise and light levels. Thus, increasing the use of salt therapy requires further research to improve the sanitary and hygienic control of silvinite complexes.

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