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Hybrid Reentry Guidance Based on the Online Trajectory Planning.
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- Author(s): WANG Jun-bo1; QU Xin1; REN Zhang1
- Source:
Journal of Astronautics / Yuhang Xuebao. Sep2012, Vol. 33 Issue 9, p1217-1224. 8p.- Subject Terms:
- Source:
- Additional Information
- Abstract: A hybrid reentry guidance algorithm is developed for a reentry vehicle. The online piecewise trajectory planning based on waypoints and trajectory tracking guidance algorithm are incorporated. The dimensionless kinematic equations of the reentry vehicle and the longitude-latitude expressions are established in guidance coordinate frame (GCF). The reentry constraints are described and incorporated in the proposed guidance algorithm. The way points based on the initial reference trajectory are designed to piecewise implement trajectory planning. The linear quadratic regulator (LQR) controller is designed to implement longitudinal guidance, and the lateral error boundary is given to determine the sign of the bank angle. Simulation and experimental results indicate that the average calculating time of each trajectory planning is less than 0.2 seconds and the guidance accuracy requirements are satisfied as well. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Journal of Astronautics / Yuhang Xuebao is the property of China International Book Trading Corp. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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