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CONTROL OF MARS GUIDED ENTRY (PART II): ROBUST nonlinear dynamics inversion

IFAC Proceedings Volumes 2007年第7期40卷 581-586页

作者： Aymeric Kron Jean de Lafontaine NGC Aerospace Ltd 1650 rue King Ouest Bureau 202 Sherbrooke QC J1J 2C3 Canada

This paper addresses the 6 degrees-of-freedom control of a Mars Lander Module during its aerodynamic entry phase. It focuses on Robust nonlinear dynamics inversion (RDI) technique. On one hand, RDI is shown to be efficient for translation controller synthesis. On the other hand, this technique is shown to be inappropriate for attitude control except for the gyroscopic torque cancellation which could be coupled with a robust static controller. Monte-Carlo simulations are performed to demonstrate the robust performance of the 6 DOF control software. The nonlinear simulator includes a realistic model of the atmosphere (European Mars Climate Database) and Mars gravity (J2).

关键词： Mars Entry Robust Control nonlinear dynamics inversion

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nonlinear MPPT control of wind turbine: an NDI and MRAC based approach 27

Nonlinear MPPT control of wind turbine: an NDI and MRAC base...

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27th Iranian Conference on Electrical Engineering (ICEE)

作者： Bustan, Danyal Quchan Univ Technol Elect Engn Quchan Iran

ISBN: (纸本)9781728115085

In this paper, the nonlinear control problem of wind turbine for maximum power extraction is addressed. In the proposed method, based on nonlinear dynamic inversion (NDI) and model reference adaptive control (MRAC), a two stages adaptive controller is designed to track the desired rotor speed. At the first stage, using NDI, nonlinear dynamics of the system is transferred to a linear relation and in the second stage, using MRAC, desire reference is tracked. In this approach, in addition to tracking of the desired reference in steady state, using three parameters, the transient response of the overall system can be controlled too. Simulations show the effectiveness of the proposed method compared to standalone NDI controller.

关键词： nonlinear dynamics inversion Model reference adaptive control Maximum peak power tracking Wind turbine

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nonlinear MPPT control of wind turbine: an NDI and MRAC based approach

Nonlinear MPPT control of wind turbine: an NDI and MRAC base...

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Iranian Conference on Electrical Engineering

作者： Danyal Bustan Electrical Engineering Quchan University of Technology Quchan Iran

关键词： nonlinear dynamics inversion Model reference adaptive control Maximum peak power tracking Wind turbine

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