摘要
可重复使用运载火箭是典型的复杂非线性、强不确定性系统,其着陆飞行过程中存在的未知环境干扰和未建模动态将严重影响火箭姿态系统的稳定性。针对此情况,设计了火箭垂直着陆段飞行的姿态自适应控制系统,以解决上述不确定性所带来的不利影响;同时,引入误差转换技术,使得控制器能同时保证系统预设的瞬态性能和稳态性能。仿真结果表明,设计的控制算法能满足飞行姿态控制性能要求,且对外部干扰和模型不确定性具有较强的鲁棒性。
The reusable launch vehicle(RLV)is a typical class of systems with strong nonlinearity and uncertainty,where unknown environmental perturbations and unmodeled dynamics can severely affect flight stability in the landing phase.To deal with this situation,this paper proposed an adaptive attitude control strategy for the vertical recovery of the RLV,which can eliminate the influence induced from the aforementioned uncertainties.Also,we introduce a new error transformation technique,to guarantee both the prescribed transient and steady control performance.Additionally,simulation studies have been conducted to verify the feasibility and strong robustness of the proposed algorithm,in the presence of external disturbances and model uncertainties.
作者
李璟澜
杨秦敏
LI Jinglan;YANG Qinmin(College of Control Science and Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《宇航总体技术》
2020年第5期1-7,共7页
Astronautical Systems Engineering Technology
基金
自然科学基金项目(61673347,U1609214,61751205)
广东省重点研发计划项目(2018B010107002)
