摘要：The problem of fault-tolerant control is discussed for the longitudinal model of an airbreathing hypersonic vehicle （AHV） with actuator faults and external disturbances. Firstly, a fault-tolerant control strategy is presented for the longitudinal model of an AHV, which guarantees that velocity and altitude track their reference trajectories at an exponential convergence rate. However, this method needs to know the minimum value of the actuator efficiency factor and the upper bound of the external disturbances, which makes it not easy to implement. Then an improved adaptive fault-tolerant control scheme is proposed, where two adaptive laws are employed to estimate the upper bound of the external disturbances and the minimum value of the actuator efficiency factor, respectively. Secondly, the problem of designing a control scheme with control constraints is further considered, and a new adaptive fault-tolerant control strategy with input saturation is designed to guarantee that velocity and altitude track their reference trajectories. Finally, simulation results are given to show the effectiveness of the proposed methods.

摘要：导弹飞行过程中,子弹头的释放会造成母舱质心位置的改变,常规单弹头导弹的姿态动力学模型已不再适用。详细分析了释放子弹头对导弹母舱姿态运动的影响,基于质心突变对转动惯量矩阵及控制力矩的改变,构建多头分导式导弹母舱姿态动力学数学模型,通过非线性状态反馈实现解耦控制;基于解耦后的系统设计二自由度三变量内模控制器,优化了控制系统性能。理论分析与仿真结果均表明,该设计方法算法简单,易于实现,控制系统具有良好的输入跟踪性能和干扰抑制能力。

摘要：近空间高超声速飞行器的特点给其建模和控制带来了新的问题.本文首先分析高超声速飞行器的特点,进一步给出大包络飞行的统一模型.其次,总结了高超声速飞行器巡航控制、再入姿态控制研究的现状,强调了弹性、非最小相位、再入制导控制一体化设计等问题.最后,结合高超声速飞行器的发展,阐述了高超声速目标的拦截问题,提供未来可供研究的方向.

摘要：本文研究了有向图下具有非线性和干扰的无人机群的分布式合围控制问题.其中仅部分跟随者是领导者的邻居,对于每一个跟随者,至少存在一条从领导者到这个跟随者有向路径.文中假设无人机的空气动力学特性是非线性不确定的,并且领导者的输出是时变的.结合反推设计方法提出了仅利用邻居信息的分布式合围控制方法,使得跟随者的状态收敛于领导者状态所张成的凸包里.利用神经网络函数逼近技术补偿无人机系统中的非线性不确定项,通过李雅普诺夫稳定性理论证明了合围误差可以以任意收敛速度收敛到原点任意小的邻域.最后通过仿真结果验证了控制协议的有效性.