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Modeling and Simulation for the Hybrid Dynamics of Satellite Network Systems

Author: LiuDong
Tutor: ShiXiaoPing
School: Harbin Institute of Technology
Course: Control Science and Engineering
Keywords: Hybrid System Satellite Network Modeling Simulation GUI
CLC: V412.4
Type: Master's thesis
Year: 2012
Downloads: 34
Quote: 0
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Abstract


The satellite network system is a free-flight separation of the modularsystem. Free-flight separation of the modular system is composed of several pieces ofmicro-satellites network in orbit in a compact formation run. Satellite network withmultiple power satellites, satellite system used wireless energy transmission poweredsystem for conveying energy to other modules. In order to optimize the energy transferproperties for the satellite network, first you must figure out the complex dynamicrelationship between the satellite modules, for this purpose a detailed study as thefollowing: make the energy state in the satellite dynamics and flying as a continuousdynamic behavior for Joint modeling; make the energy management and distributionsystem as a discrete event-driven for system modeling; layered satellite networkreasonably, combined the continuous characteristics and discrete features to the hybridsystem theory, established the entire satellite systems; simulated of the above model oncomputer.First, study for the works of the satellite battery array and the energy change ofstate of the satellite battery array. According to the continuity of the energy state in thetotal energy of the satellite network system and the continuity characteristics in flightcharacteristics of satellites in space, established the satellite energy state model ofpower satellites and the functional satellites. The relationship on energy transferbetween the power satellites and the functional satellites, and the energy modelswitching in different states of the satellite network were analyzed; the continuousfeatures of continuous energy characteristics and the discrete features of event-triggeredswitching model was combined, and hybrid system theory as the research base toestablish a hybrid dynamic model of the overall state of the satellite network systemwas used.Secondly, simulate the energy state of the satellites in the satellite network systemunder the situations of the light areas shaded areas tasks and idle. Petri net methodswere used to analysis of the operating mechanism of the satellite network system. Theapplication of Petri net related knowledge, describe the different working conditions ofthe satellite network for Place conversion conditions are described forTransition. Combination of the satellite network operating mode, draw the Petri net of the energy status of the satellite network.Thirdly, based on Petri nets established, select the trajectory of the satellite networkrepresentative of the operational status of the orbital period. Petri net library accordingto the Transitions in sequence, these Places are the running states. Then, the energystates of the satellite network system in these operating conditions were simulated.Finally, use the MATLAB GUI build up a satellite network hybrid dynamics modelsimulation interface. According to the requirements of the energy state of the simulationof satellite networks, satellite energy initial value, task interval and failure interval canbe set in the simulation interface. The establishment of the simulation interface issignificance for analysis of the energy state of the satellite network and design ofsatellite network system.

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CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Basic theory and experiments > Flight Mechanics > Spacecraft flight mechanics
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