弹道学报2025，Vol.37Issue(4)：85-93,9.DOI:10.12115/ddxb.2025.07002
推力故障下运载火箭剩余能力可达域评估方法
Assessment Method for Reachable Domain of Residual Capability of Launch Vehicle under Thrust Fault
李可枢 1马英 1程兴 1张志国1
作者信息
- 1. 北京宇航系统工程研究所,北京 100076
- 折叠
摘要
Abstract
Mission re-planning is a critical technology for enhancing the fault tolerance of liquid-propellant launch vehicle,thus improving the reliability and safety.Its objective is to generate feasible trajectories align with the vehicle's residual capabilities following a propulsion system fault.Accurate assessment of residual capability forms the foundation for optimal re-planning decisions.To quantify the residual capability,the reachable domain concept,which is conventionally applied to orbital spacecraft and reentry vehicles,was extended to launch vehicles.Utilizing unique characteristics of space launch operations,a hierarchical dimension-reduction framework for high-dimensional reachable domain characterization was proposed.The numerical solution can be obtained by decomposing complex high-dimensional reachable domain into several trajectory optimization subproblems.The auxiliary coasting phases and the scalar-state dynamic equations were developed to achieve lossless convexification of the strongly nonlinear and non-convex orbit injection constraints in trajectory optimization,establishing the theoretical foundation for efficient reachable domain computation via convex optimization.Taking a low Earth orbit mission as a case study,various thrust drop fault scenarios during the upper-stage flight phase were simulated,and their corresponding reachable domains were computed.Results demonstrate that the proposed method effectively characterizes both the orbital plane and in-plane reachable domains,enabling comprehensive quantitative assessment of residual capabilities to support optimal re-planning decisions.关键词
运载火箭/任务重规划/可达域/推力故障/凸优化Key words
launch vehicle/mission re-planning/reachable domain/thrust fault/convex optimization分类
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李可枢,马英,程兴,张志国..推力故障下运载火箭剩余能力可达域评估方法[J].弹道学报,2025,37(4):85-93,9.
