scholarly journals Modeling of onboard systems operation of small satellites based on general logical-probabilistic method

2021 ◽  
Vol 1745 (1) ◽  
pp. 012086
Author(s):  
V V Salmin ◽  
I S Tkachenko ◽  
S S Volgin ◽  
M A Ivanushkin
Keyword(s):  
Probabilistic Method ◽  
Small Satellites

Software tool for evaluation of reliability and survivability of complex technical system based on logical-probabilistic methodology

Doklady BGUIR ◽  
2022 ◽  
Vol 19 (8) ◽  
pp. 72-80
Author(s):  
V. Yu. Skobtsov ◽  
N. V. Lapitskaya
Keyword(s):  
Complex System ◽  
Probabilistic Method ◽  
Probabilistic Approach ◽  
Software Tool ◽  
Technical System ◽  
Computational Experiments ◽  
Software Complex ◽  
Small Satellites ◽  
Complex Technical System ◽  
Onboard Equipment

The paper presents solutions for estimation and analysis of complex system (CS) reliability and survivability indicators based on the logical-probabilistic approach. Modified logical-probabilistic method and software tool for evaluating the reliability and survivability of onboard equipment (OE) of small satellites were developed (SS). The correctness of the suggested method and software tool was shown by computational experiments on some systems of CS SS similar to Belarusian SS, and later compared with the “Arbitr” software complex results.

Small Satellites: Past, Present, and Future

2009 ◽  
Author(s):  
H. Helvajian ◽  
S. Janson
Keyword(s):  
Small Satellites

ROCKOT - The proven, competitive launch system for small satellites

2000 ◽  
Author(s):  
P. Freeborn ◽  
G. Stamerjohanns ◽  
M. Kinnersley
Keyword(s):  
Small Satellites

DEFINITION OF TIME SPENT ON REPAIR OF BUS TRANSMISSION UNITS TAKING INTO ACCOUNT TECHNOLOGICAL EQUIPMENT RELIABILITY

2020 ◽  
Vol 2020 (9) ◽  
pp. 29-33
Author(s):  
Sergey Bulatov
Keyword(s):  
Negative Impact ◽  
Probabilistic Method ◽  
Technological Equipment ◽  
Quality And Safety ◽  
Transmission Unit ◽  
Equipment Reliability ◽  
Hours Of Work ◽  
Definition Of ◽  
Time Decrease

The paper purpose is the effectiveness estimation in the technological equipment use, taking into account its reliability and productivity for defective transmission units of buses. The problem consists in the determination of time to be spent on repair of bus transmission units taking into account technological equipment reliability. In the paper there is used a probabilistic method for the prediction bus transmission units, and also a method of the dynamics of averages which allow ensuring minimum of costs for units downtime during repair and equipment cost. The need for repair of transmission units (gear box) arises on an average after 650 hours, the average productivity of the bench makes 4.2 bus / hour. The bench fails on the average after 4600 hours of work, the average time of the bench makes 2 hours. In such a way the solution of the problem specified allows analyzing the necessity of time decrease for transmission unit repair to avoid long downtimes of buses in repair areas without negative impact upon high repair quality and safety during the further operation.

Additive bases via Fourier analysis

2021 ◽  
pp. 1-12
Author(s):  
Bodan Arsovski
Keyword(s):  
Abelian Group ◽  
Fourier Analysis ◽  
Vector Space ◽  
Abelian Groups ◽  
Finite Abelian Group ◽  
Probabilistic Method ◽  
Additive Basis ◽  
Generating Sets

Abstract Extending a result by Alon, Linial, and Meshulam to abelian groups, we prove that if G is a finite abelian group of exponent m and S is a sequence of elements of G such that any subsequence of S consisting of at least $$|S| - m\ln |G|$$ elements generates G, then S is an additive basis of G . We also prove that the additive span of any l generating sets of G contains a coset of a subgroup of size at least $$|G{|^{1 - c{ \in ^l}}}$$ for certain c=c(m) and $$ \in = \in (m) < 1$$ ; we use the probabilistic method to give sharper values of c(m) and $$ \in (m)$$ in the case when G is a vector space; and we give new proofs of related known results.

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