摘要
针对一类具有大包线飞行和快时变特性的高超声速飞行器,采用多个线性时变(LTV)多胞模型近似地描述高超声速飞行器的纵向非线性模型.对于各LTV多胞模型,离线设计局部双模预测控制器来显式地处理控制输入和状态的约束问题,并获得相应的稳定域.然后,构造各局部控制器间稳定的切换策略.仿真结果表明,所提方法在控制输入和状态满足给定的约束范围情况下,不仅能更快地跟踪较大范围的速度和高度的指令信号,而且大幅减少了在线计算时间.
For a hypersonic vehicle with wide flight envelopes and fast time-varying processes, a set of linear time varying（LTV） polytopic models is employed to describe the nonlinear longitudinal model of a hypersonic vehicle. For each LTV polytopic model, a local dual mode predictive controller is offline designed to obtain the stable region and explicitly handle the state and control constraints. Then the stability of the scheduled controller is guaranteed by designing the switching strategy in the set of local dual mode predictive controllers. Simulation results show that the proposed control strategy not only obtains faster tracking of velocity and altitude commands in a relatively large range without the violation of the state and control constraints, but also reduces the online computation.
出处
《控制与决策》
EI
CSCD
北大核心
2017年第11期2063-2070,共8页
Control and Decision
基金
宇航动力学国家重点实验室开放基金项目(2011ADL-JD0202)
国家自然科学基金项目(61202128
61463029)
