可重复使用运载器再入轨迹与制导控制方法综述

可重复使用运载器（RLV）是未来实现快速、可靠及廉价进出空间的必然趋势，也是当前航空航天领域的研究热点。对RLV再入段的轨迹优化、制导及控制方法进行了综述。在RLV再入轨迹优化方法上，分别从间接法、直接法以及伪谱法等方面进行了综述，在深入分析每类方法特点的基础上，对其未来发展趋势进行了展望；在RLV再入制导方法上，分别从离线标称轨迹制导、在线轨迹重构制导、预测校正制导等方面进行了综述，对每类再入制导方法进行了优缺点分析，并对未来发展方向进行了总结；在RLV再入姿态控制方法上，分别从线性控制方法、非线性控制方法、智能控制方法等方面对其进行了综述，并对其特点和未来发展趋势进行了分析。最后，对RLV再入制导控制一体化方法进行了综述，指出了未来RLV制导控制一体化研究中亟需解决的关键问题。

Reentry trajectory optimization,guidance and control methods for reusable launch vehicles:Review

Reusable Launch Vehicle (RLV) represent an inevitable trend to achieve fast, reliable and cheap access to space in the future, and also a research hotspot in the field of aerospace. The reentry trajectory optimization, guidance and control methods of RLVs are reviewed in this paper. The trajectory optimization methods are reviewed from the aspects of the indirect method, the direct method and the pseudospectral method. The future development trend of each method is prospected based on the depth analysis of their characteristics. The reentry guidance of RLVs is reviewed from the aspects of offline nominal trajectory guidance, online trajectory reconstruction guidance, and predictor-corrector guidance. The advantages and disadvantages of each type of reentry guidance method are analyzed, and their future development direction summarized. In terms of control methods, the reentry attitude control problems of RLVs are reviewed from the linear control methods, non-linear control methods, and intelligent control methods. Moreover, the research hotspots of future control methods are discussed. Finally, the RLV reentry integrated guidance and control method is reviewed, and the key issues that need to be resolved in the future research of integrated guidance and control are pointed out.