An Extended Robust ∞ H Filter Design for Sdins in - Flight Alignment
نویسندگان
چکیده
Abstract: In this paper, a robust filter for an in-flight alignment (IFA) is presented to effectively eliminate system errors in the case where a strapdown inertial navigation system (SDINS) has large initial attitude errors. First, an extended robust ∞ H filter is proposed for a general nonlinear uncertain system. We also analyze the characteristics of the proposed filter, such as an ∞ H performance criterion, using the Lyapunov function method. Analysis results show that the proposed filter has robustness against disturbances, such as process and measurement noises, and against parameter uncertainties. Then the IFA for the SDINS is designed using the presented filter. Simulation results demonstrate that the proposed filter effectively improve the performance. Copyright © 2002 IFAC
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