具有碰撞角约束的三维圆轨迹制导律

Abstract

Abstract: A novel three-dimensional (3D) guidance law is proposed for a reentry vehicle with impact angle constraints. To make the circular guidance more applicable, two deviation variables are defined. Then a closed-loop modification method is presented for the mission. Furthermore, a 3D closed-loop circular guidance law (3CCGL) for varying velocities is derived by solving the dynamical equations of the reentry vehicle. The simulation results demonstrate that the 3CCGL can assure the reentry vehicle to impact the target accurately from a specified direction. Compared with another law from the literature, the proposed guidance law is shown to perform favorably with shorter path length, larger terminal velocity and great improvement in the terminal maneuverability of the reentry vehicle in a large-angle turning engagement scenario.

Key words: reentry, guidance law, 3D space, circular navigation, impact angle constraints, closed-loop modification

CLC Number:

V448

HU Xijing, HUANG Xuemei. Three-dimensional Circular Guidance Law with Impact Angle Constraints[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, (3): 508.

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Three-dimensional Circular Guidance Law with Impact Angle Constraints

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