主要從事飛行器軌迹優化、制導與控制，利用先進優化與控制算法實現（多）飛行器在複雜環境、複雜約束條件下充分發揮最優性能、在線實時計算進行自主飛行的能力，應用對象包括高超聲速飛行器、可重複使用火箭/運載火箭、火星探測器、旋翼/固定翼無人機等。研究領域主要包括：
1、飛行力學
2、飛行器軌迹優化、制導與控制
3、模型預測控制與優化算法開發
4、凸優化及其應用
[1] Runqiu Yang and Xinfu Liu, “Fuel-Optimal Powered Descent Guidance with Free Final-Time and Path Constraints,” Acta Astronautica, Vol. 172, pp. 70-81, 2020.
[2] Xinfu Liu, “Fuel-Optimal Rocket Landing with Aerodynamic Controls,” Journal of Guidance, Control, and Dynamics, Vol. 42, No. 1, pp. 65-77, 2019.
[3] Xinfu Liu, Ping Lu, Binfeng Pan, “Survey of Convex Optimization for Aerospace Applications,” Astrodynamics, Vol. 1, No. 1, pp. 23-40, 2017.
[4] Xinfu Liu, Zuojun Shen, and Ping Lu, “Closed-Loop Optimization of Guidance Gain for Constrained Impact,” Journal of Guidance, Control, and Dynamics, Vol. 40, No. 2, pp. 453-460, 2017.
[5] Xinfu Liu, Zuojun Shen, and Ping Lu, “Exact Convex Relaxation for Optimal Flight of Aerodynamically Controlled Missiles,” IEEE Transactions on Aerospace and Electronic System, Vol. 52, No. 4, pp. 1881-1892, 2016.
[6] Xinfu Liu, Zuojun Shen, and Ping Lu, “Entry Trajectory Optimization by Second-Order Cone Programming,” Journal of Guidance, Control, and Dynamics, Vol. 39, No. 2, pp. 227-241, 2016.
[7] Xinfu Liu and Zuojun Shen, “Rapid Smooth Trajectory Planning for High Lift/Drag Hypersonic Glide Vehicles,” Journal of Optimization Theory and Applications, Vol. 168, No. 3, pp. 917-943, 2016.
[8] Xinfu Liu, Zuojun Shen, and Ping Lu, “Solving the Maximum-Crossrange Problem via Successive Second-Order Cone Programming with a Line Search,” Aerospace Science and Technology, Vol. 47, pp. 10-20, 2015.
[9] Xinfu Liu and Ping Lu “Solving Nonconvex Optimal Control Problems by Convex Optimization,” Journal of Guidance, Control, and Dynamics, Vol. 37, No. 3, pp. 750-765, 2014.
[10] Ping Lu and Xinfu Liu, “Autonomous Trajectory Planning for Rendezvous and Proximity Operations by Conic Optimization,” Journal of Guidance, Control, and Dynamics, Vol. 36, No. 2, pp. 375-389, 2013.
會議論文：
[1] Runqiu Yang and Xinfu Liu, “Gravity-Turn-Based Precise Landing Guidance for Reusable Rockets,” 2020 International Conference on Guidance, Navigation and Control (ICGNC 2020), Tianjing, China, Aug. 2020.
[2] Guoxu Zhang, Hailiang Kuang, and Xinfu Liu, “Fast Trajectory Optimization for Quadrotor Landing on a Moving Platform,” The 2020 International Conference on Unmanned Aircraft Systems (ICUAS’20), Athens, Greece, Sept. 2020.
[3] Chenyang Xi and Xinfu Liu, “Unmanned Aerial Vehicle Trajectory Planning Via Staged Reinforcement Learning,” The 2020 International Conference on Unmanned Aircraft Systems (ICUAS’20), Athens, Greece, Sept. 2020.
[4] Huan Jiang and Xinfu Liu, “Fast Three-Dimensional Path Planning with Avoidance Zones Based on Convex Optimization,” AIAA Guidance, Navigation, and Control Conference, San Diego, Jan 2019.
[5] Runqiu Yang and Xinfu Liu, “Comparison of Convex Optimization-Based Approaches to Solve Nonconvex Optimal Control Problems,” AIAA Guidance, Navigation, and Control Conference, San Diego, Jan 2019.
[6] Xinfu Liu, “Fuel-Optimal Rocket Landing with Aerodynamic Controls,” AIAA Guidance, Navigation, and Control Conference, Grapevine, 2017.1.9-2017.1.13.
[7] Xinfu Liu and Ping Lu, “Robust Trajectory Optimization for Highly Constrained Rendezvous and Proximity Operations,” AIAA Guidance, Navigation, and Control Conference, Boston, 2013.8.19-2013.8.22.
[8] Xinfu Liu and Ping Lu, “Solving Non-Convex Optimal Control Problems by Convex Optimization,” AIAA Guidance, Navigation, and Control Conference, Boston, 2013.8.19-2013.8.22.
[9] Ping Lu and Xinfu Liu, “Autonomous Trajectory Planning for Rendezvous and Proximity Operations by Conic Optimization,” AIAA Guidance, Navigation, and Control Conference, Minneapolis, 2012.8.13-2012.8.16.
