Mr. Jiaye Chen Profile

Jiaye Chen

at Harbin Institute of Technology

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Proceedings Article | 5 March 2018 Paper

Reusable launch vehicle model uncertainties impact analysis

Jiaye Chen, Rongjun Mu, Xin Zhang, Yanpeng Deng

Proceedings Volume 10710, 107101M (2018) https://doi.org/10.1117/12.2317531

KEYWORDS: Aerodynamics, Control systems design, Systems modeling, Astronomical engineering, Control systems, Analytical research, Mathematical modeling, Data modeling, Uncertainty analysis, Process modeling

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Reusable launch vehicle(RLV) has the typical characteristics of complex aerodynamic shape and propulsion system coupling, and the flight environment is highly complicated and intensely changeable. So its model has large uncertainty, which makes the nominal system quite different from the real system. Therefore, studying the influences caused by the uncertainties on the stability of the control system is of great significance for the controller design. In order to improve the performance of RLV, this paper proposes the approach of analyzing the influence of the model uncertainties. According to the typical RLV, the coupling dynamic and kinematics models are built. Then different factors that cause uncertainties during building the model are analyzed and summed up. After that, the model uncertainties are expressed according to the additive uncertainty model. Choosing the uncertainties matrix’s maximum singular values as the boundary model, and selecting the uncertainties matrix’s norm to show t how much the uncertainty factors influence is on the stability of the control system . The simulation results illustrate that the inertial factors have the largest influence on the stability of the system, and it is necessary and important to take the model uncertainties into consideration before the designing the controller of this kind of aircraft( like RLV, etc).

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