为了简化已有的高超声速飞行器纵向通道反步法控制,提出了一种基于预测模型的模糊控制器.针对高度子系统,通过对原模型进行转换得到四步预测模型.控制器设计仅需一个模糊系统对不确定部分进行估计补偿,可避免虚拟控制量的不断求取.稳定性分析证明了系统跟踪误差是一致终值有界的.与反步法相比,该策略大大简化控制器的设计复杂度.仿真验证了算法的有效性.
An adaptive fuzzy controller using prediction model was proposed to simplify the existed back-stepping design for the longitudinal dynamics of hypersonic flight vehicle.For the altitude subsystem,an explicit four-step ahead prediction model is derived from the original dynamics.Only one fuzzy logic system is needed to approximate the system uncertainty and in this w ay it avoids the repeated calculation of the virtual control.The system tracking error is guaranteed to be ultimately uniformly bounded via stability analysis.Compared w ith back-stepping scheme,the controller is considerably simpler.Simulation is presented to show the effectiveness of the proposed control approach.