Presentation on theme: "Space Research Institute"— Presentation transcript:
1Space Research Institute Space whether affects on power systems: prediction, risk analysis and modelingVitaliy YatsenkoPanos PardalosNikita BoikoSteffen RebbenackSpace Research InstituteNASU & NSAUUniversity of FloridaІКД
2ProblemModeling natural space ionizing radiation effects on devices and materialsSpace whether predictionRisk analysisspace nuclear power systemselectrons damage satellitesnano-engineered super-capacitorsmicro-solar power systemsoptical devices and lasers2
3What is space weather?Space weather describes the physical processes induced by solar activity that have impact on our terrestrial and space environment, on ground based and space technological systems, and on human activities and health.
6Space weather affects on electrical power system Space weather storm can cause electricity to flow in Earth’s atmosphereSpace weather storm mess up the flow of electricity to homesTransformers work fine with AC (alternating current) electricity, but can damage if too much DC (direct current) electricity flows into them.
7Electrons damage satellites In January 1994, three geostationary satellites suffered total failures of their momentum wheel control circuitry. Services were affected for hours, and one satellite never fully recovered. At the time it was well known that satellites could suffer damage when high energy particles were emitted from the sun during an explosive Solar Particle Event (SPE). Protons and electrons travelling at relativistic speeds (a significant fraction of the speed of light such as 0.3c) could impact with orbiting satellites causing damage in a number of different ways. In this case, however, no SPE had been observed.7
8Main goals of space weather establishing the scientific basis to understand physical phenomena and processes in near space;developing operational tools to predict and forecast them.Space weather measurementsSpace weather on the Earth is measured by geomagnetic indices. There are lots of them, but the most widely used are 3: storm-time disturbance Dst, planetary index Kp and auroral index AE.
9Number of traumas due to traffic accidents in Kyiv correlates with solar activity
10IntroductionThe most straightforward approach in understanding the dynamics of the magnetosphere is to study the whole complex chain of physical processes involved in its dynamics and to conjugate them in a global model of the evolution of the magnetosphere under the influence of the solar wind.
11Problem Problem Problem Problem Space radiation comes in many forms and affects electronic components in diverse ways.Aerospace investigations of how energetic particles interact with integrated circuits and other electronics have been helping spacecraft designers and mission planners minimize the risk of component failure or performance degradation.11
12Problem Problem Problem Problem Explosions on the Sun create storms of radiation, fluctuating magnetic fields, and swarms of energetic particles.These phenomena travel outward through the Solar System with the solar wind.Upon arrival at Earth, they interact in complex ways with Earth's magnetic field, creating Earth's radiation belts and the Aurora.Some space weather storms can damage satellites, disable electric power grids, and disrupt cell phone communications systems.12
13Solar wind parameters solar wind speed density positive ions protons magnetic fieldelectric field13
14Problem y(k+1) y(k+m) u(k) z=f(v,u) μ(v)=Ef(v,u) v(k) Black Box PredictionDeviceRisk AnalysisBlack BoxPredictionDeviceRisk Analysisu(k)Solar windparametersz=f(v,u)μ(v)=Ef(v,u)v(k)Fig. 1 Prediction and Risk Analysis14
15ProblemBEVBurton, R. K., R. L. McPherron, and C. T. Russell, The terrestrial magnetosphere: A half-wave rectifier of the interplanetary electric field, Science, 189, 717, 1975.Burton, R. K., R. L. McPherron, and C. T. Russell, An empirical relationship between interplanetary conditions and Dst, J. Geophys. Res., 80, , 1975.Kan, J. R., and L. C. Lee, Energy coupling function and solar wind-magnetosphere dynamo, Geophys. Res. Lett, 6, , 1979.Boyle, C. B., P. H. Reiff, and M. R. Hairston, Empirical polar cap potentials, J. Geophys. Res., 102, , 1997.
16Experimental dataThe SPDF hosts the S3C Active Archive, which consists of web-based services for survey and high resolution data, trajectories, and modeling software. The Facility delivers value-added services and leads in the definition, development, operation, and promotion of collaborative projects.
17Dynamic-information forecasting of Dst index Magnetosphere is considered as a nonlinear complex dynamical systemDst indexDst is sought for as an output of a nonlinear dynamical “black-box”Solar wind parametersData are from OMNI2 database:and Kyoto WDC for Geomagnetism:
18“Black-box model” approach Discrete recursive (nonlinear autoregressive moving average model with exogenous inputs) models are considered. This is a so-called ‘black box’ or ‘input-output’ model, which seeks only to reproduce the behaviour of the system’s output in response to changes in its setpoint or inputs.One of the most important features of models is that model terms are physically interpretable. For example, discrete and continuous time models of the evolution of Dst can be derived using NARMAX methodology.
19Dynamical-information approach Dynamical-information approach is based on the “black-box” model and Lyapunov exponents to describe magnetospheric dynamics.Reconstruction of the dynamical model is based upon the application of multiobjective learning algorithms to identification of model’s structure and parameters.A forecasting algorithm based on Lyapunov exponents is also proposed.
20Dynamical-information approach Time domain techniques are used to identify a dynamical model for the evolution of the Dst index under the influence of the solar wind.Frequency domain analysis of this model is used to study spectral properties of the Dst index dynamics.
21Nonlinear AutoRegressive Moving Average model with eXogenous input. F[.]
28Identification of linear perturbations Local maxima correspond to magnetospheric eigenmodes(Cheremnykh & Yatsenko, 2007)(Balikhin et al., 2001)phasemagnitudeFrequency, h-1
29Neural network prediction of interplanetary shocks Neural network prediction method based on the data from 5 data channels of ACE spacecraft (EPAM)Preliminary experimental research showing promising capabilities of the method
30Risk Analysis of Laser Elements for Complex Characterization of Damages by Space Radiation Dynamic probabilistic risk analysis of optical elements for complex characterization of damages using physical model of solid state lasers and predictable level of ionizing radiation and space weather.The following models and software have been studied:solid-state laser modelmathematical models for dynamic probabilistic risk assessmentsoftware for modeling and prediction of ionizing radiation
31Risk Analysis of Laser Elements for Complex Characterization of Damages by Space Radiation Probabilistic risk assessment is a comprehensive, structured, and logical analysis method aimed at identifying and assessing risks in solid-state lasers for the purpose of cost-effectively improving their safety and performance.This method based on the Conditional Value-at-Risk measure (CVaR) and the expected loss exceeding Value-at-Risk (VaR).We propose to use a new dynamical-information approach for radiation damage risk assessment of laser elements by cosmic radiation.
32Optimization problem with constraints on risk Let z=f(v,u) be a loss function of a device depending upon the control vector v and a random vector u. The control vector v belongs to a feasible set V, satisfying imposed requirements. We assume that the random vector u has a probability density p(u). We can define a functionOptimization model
33PapersO. Cheremnykh, V. Yatsenko, O. Semeniv, Iu. Shatokhina. Nonlinear dynamical model for space weather prediction. Ukr. Phys. J , N 5. - PP. Pardalos, V. Yatsenko. Optimization approach to the estimation and control of Lyapunov exponents. Optimization Theory and its Applications, 2006, 128(1).-P
34ConclusionThe following models have been proposed: (a) solar wind influences on devices; (b) forecasting of ionizing radiation; and (c) risk assessment in safety analysis.An application of the multicriterion optimization method to the prediction of the Dst index was proposed.Two novel algorithms of the identification of discrete input-output models have been developed.The simulation results shown that the proposed technique provides an efficient method to get the optimum difference equation model of the Dst index.