基于扩张状态观测器设计了导弹纵向通道控制系统。首先将弹体弹性、模型参数的不确定性和测量元件的动态特性视为复合干扰,并将其作为系统的一个扩张状态;然后利用扩张状态观测器对扩维后的系统状态进行估计,将估计值用于状态反馈和设计控制补偿项;最后给出了控制算法的稳定性证明。仿真结果表明,所设计的控制算法具有较好的指令跟踪性能和强鲁棒性。 Based on the extended state observer, a missile longitudinal channel control system is designed. First, the elasticity of the projectile, the uncertainty of the model parameters and the dynamic characteristics of the measuring element are regarded as the complex interferences, which are regarded as an expansion state of the system. Then, the expanded state observer is used to estimate the state of the expanded system. The estimated value is used for the state feedback and the design control compensation term. Finally, the stability of the control algorithm is proved. Simulation results show that the proposed control algorithm has better instruction tracking performance and robustness.