Accommodating the plasma brake experiment on-board the Aalto-1 satellite

Khurshid, Osama; Tikka, Tuomas; Praks, Jaan; Hallikainen, M.

doi:10.3176/proc.2014.2s.07

Cited by 36 publications

(29 citation statements)

References 18 publications

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“…Table 1 + ε 20 A real-world application is added to the experiment to test real-world applicability of the algorithm. The application is a braking system for satellites (Kestil et al 2013, Khurshid et al 2014 called AaltoBrake. This simulator has a 5-dimensional input vector containing, among others, the mass of the braking system.…”

Section: Methodsmentioning

confidence: 99%

Sensitivity analysis of expensive black-box systems using metamodeling

Steenkiste

Herten

Couckuyt

et al. 2016

2016 Winter Simulation Conference (WSC)

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Simulations are becoming ever more common as a tool for designing complex products. Sensitivity analysis techniques can be applied to these simulations to gain insight, or to reduce the complexity of the problem at hand. However, these simulators are often expensive to evaluate and sensitivity analysis typically requires a large amount of evaluations. Metamodeling has been successfully applied in the past to reduce the amount of required evaluations for design tasks such as optimization and design space exploration. In this paper, we propose a novel sensitivity analysis algorithm for variance and derivative based indices using sequential sampling and metamodeling. Several stopping criteria are proposed and investigated to keep the total number of evaluations minimal. The results show that both variance and derivative based techniques can be accurately computed with a minimal amount of evaluations using fast metamodels and FLOLA-Voronoi or density sequential sampling algorithms.

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Section: Methodsmentioning

confidence: 99%

Sensitivity analysis of expensive black-box systems using metamodeling

Steenkiste

Herten

Couckuyt

et al. 2016

2016 Winter Simulation Conference (WSC)

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“…When the charged tether interacts with the ionospheric plasma the orbital velocity of the satellite will decrease. This application is called the plasma brake [20][21][22]. After the validation of the E-sail effect the satellite will perform the plasma brake experiment by keeping the tether charged for a long period of time.…”

Section: Mission Analysismentioning

confidence: 99%

ESTCube-1 nanosatellite for electric solar wind sail in-orbit technology demonstration

Lätt¹,

Slavinskis

Ilbis

et al. 2014

Proc. Estonian Acad. Sci.

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This paper presents the mission analysis, requirements, system design, system level test results, as well as mass and power budgets of a 1-unit CubeSat ESTCube-1 built to perform the first in-orbit demonstration of electric solar wind sail (E-sail) technology. The E-sail is a propellantless propulsion system concept that uses thin charged electrostatic tethers for turning the momentum flux of a natural plasma stream, such as the solar wind, into spacecraft propulsion. ESTCube-1 will deploy and charge a 10 m long tether and measure changes in the satellite spin rate. These changes result from the Coulomb drag interaction with the ionospheric plasma that is moving with respect to the satellite due to the orbital motion of the satellite. The following subsystems have been developed to perform and to support the E-sail experiment: a tether deployment subsystem based on a piezoelectric motor; an attitude determination and control subsystem to provide the centrifugal force for tether deployment, which uses electromagnetic coils to spin up the satellite to one revolution per second with controlled spin axis alignment; an imaging subsystem to verify tether deployment, which is based on a 640 × 480 pixel resolution digital image sensor; an electron gun to keep the tether at a high positive potential; a high voltage source to charge the tether; a command and data handling subsystem; and an electrical power subsystem with high levels of redundancy and fault tolerance to mitigate the risk of mission failure.

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“…The first engineering application is the simulation of a satellite braking system [41,42]. The system has a five-dimensional input which contains, among others, the mass of the braking system.…”

Section: Name Equation Inputsmentioning

confidence: 99%

Sequential sensitivity analysis of expensive black-box simulators with metamodelling

Steenkiste

Herten

Couckuyt

et al. 2018

Applied Mathematical Modelling

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Simulators are an essential tool in the design and analysis of complex systems. For many tasks in engineering, highly accurate simulators are used instead of expensive real-life experiments. As accuracy increases, these simulators are becoming computationally more expensive to evaluate. Sensitivity analysis provides information on the importance of the inputs with regard to the outputs. This does not only provide critical information about the workings of the system but also allows to discard inputs with low impact on the outputs. However, sensitivity analysis is an expensive process in terms of number of evaluations. Hence, metamodelling techniques are used to reduce the computational burden. In this paper we present, discuss and evaluate a novel algorithm for sequential variance-based and derivative-based sensitivity analysis of expensive blackbox simulators using metamodelling. Two new stopping criteria are proposed on top of the traditional model error based stopping criteria. Extensive testing on benchmark problems and engineering use cases shows the sensitivity indices can be efficiently and accurately computed with a limited number of simulator evaluations.

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Accommodating the plasma brake experiment on-board the Aalto-1 satellite

Cited by 36 publications

References 18 publications

Sensitivity analysis of expensive black-box systems using metamodeling

Sensitivity analysis of expensive black-box systems using metamodeling

ESTCube-1 nanosatellite for electric solar wind sail in-orbit technology demonstration

Sequential sensitivity analysis of expensive black-box simulators with metamodelling

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