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Space-based reentry hypersonic research aircraft guidance method

Author: LiaoHaiJun
Tutor: GuanYingZi
School: Harbin Institute of Technology
Course: Aircraft design
Keywords: Space-based hypersonic vehicle Standard rail -guided method LQR tracking control Heading angle error corridor
CLC: V448.235
Type: Master's thesis
Year: 2010
Downloads: 315
Quote: 0
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Abstract


In this paper, space-based reentry Reentry Guidance Hypersonic study the issue , has completed the following studies : the establishment of a space-based reentry vehicle kinematic model . Analysis of the reentry process may encounter problems. Complete re- design of the corridor and analyzes the influencing factors. To meet a variety of reentry constraints ( peak heat flow constraints , overload constraints , dynamic pressure constraints ) and terminal constraints under the premise of studying a real-time on-orbit vertical trajectory generation algorithm will strongly constrained nonlinear programming problem into a single track parametric search problems. Designed to track the longitudinal section and approximate equilibrium initial descent glide segments. The initial drop Trajectory designed to be a constant inclination angle again . Transition points by searching satisfy the conditions of constant inclination angle to complete the initial decline in the initial segment design. Intermediate point by searching tilt angle value, approximate equilibrium glide phase to simplify the design of the longitudinal component of the reference trajectory segment linear function . Mathematical simulation showed that: the algorithm can generate in orbit more quickly airworthiness longitudinal reference trajectory . The space-based hypersonic reentry vehicle guidance problem is divided into longitudinal and lateral control two aspects of guidance . By LQR trajectory tracking controller track to achieve the vertical longitudinal reference trajectory guidance ; through the heading angle error corridor constraints to achieve lateral trajectory control . Set heading angle error to change the tilt angle of the boundary value symbols , thus ensuring the heading angle error in a smaller range. Mathematical simulation showed that: tracking controller can complete the reference trajectory tracking ; trajectory lateral movement was well controlled.

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CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Space instrument,spacecraft devices,spacecraft guidance and control > Guidance and Control > Spacecraft guidance and control > Guidance > Entry Guidance
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