Gauss time grid parameterization reentry trajectory planning of hypersonic vehicle under heating rate constraint

被引：0
|
作者：
Liu P. [1 ]
Liu H. [1 ]
Qiu G.-Q. [1 ]
Liu X.-G. [2 ]
机构：
[1] College of Automation, Chongqing University of Posts and Telecommunications, Chongqing
[2] College of Control Science & Engineering, Zhejiang University, Zhejiang, Hangzhou
来源：
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | 2022年 / 39卷 / 12期
基金：
中国国家自然科学基金;
关键词：
control variable parameterization; flight path; heating rate constraint; hypersonic vehicle (HV); nonuniform discretization; trajectory optimization;
D O I：
10.7641/CTA.2022.10723
中图分类号：
学科分类号：
摘要：
An improved control variable parameterization (CVP) optimization method combining with the inequality path constraints smoothing handling and the nonuniform Gauss discrete time grid is proposed for the hypersonic vehicle (HV) reentry trajectory planning with heating rate constraint. Firstly, the HV reentry trajectory planning optimization problem is established by analyzing the HV dynamic equations and constraint limitations. Next, a smoothing function is employed to handle inequality path constraints and an extra state parameter is introduced to transform them into state equations. Accordingly, a non-uniform Gauss discrete time grid strategy is proposed under the CVP approach frame to improve the angle of attack control precision and the HV reentry downrange. Finally, the simulation tests are carried out on a common aero vehicle to verify the performance of the proposed method and then to analyze the impact of different heating rate constraints on maximal reentry downrange. Test results reveal that the maximal reentry downrange of the proposed method increases by 320.1 km (4.1% improvement) compared with the uniform time grid discretization CVP–S–P method, showing the effectiveness of the improvement. Meanwhile, numerical tests show that the influence of maximal heating rate reduction to downrange is limited, and the results reveal that when heating rate constraint decreases by 15%, maximal downrange only reduces 3.16%, indicating the theoretical value of the proposed method in HV thermal protection system design. © 2022 South China University of Technology. All rights reserved.
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页码：2283 / 2292
页数：9
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