Online aerodynamic coefficient identification method for remote guidance rocket

The invention discloses a remote guidance rocket online aerodynamic coefficient identification method, which comprises the following steps: firstly, according to a three-degree-of-freedom guidance rocket mass point dynamics model, taking aerodynamic acceleration as a new state variable, and establishing a guidance rocket expansion state dynamics model; secondly, designing an extended state observer based on the established extended state dynamical model, and identifying the real-time aerodynamic acceleration; then, aiming at the problem of measurement noise, designing a nonlinear differential tracker, and carrying out smoothing processing on an identification result; and finally, establishing a real-time aerodynamic coefficient identification formula based on a standard atmospheric model. The method is universal in structure and high in engineering practice ability. 本发明公开了一种远程制导火箭在线气动系数辨识方法，首先根据三自由度制导火箭质点动力学模型，将气动加速度视为新的状态变量，建立制导火箭扩张状态动力学模型；其次，基于已建立的扩张状态动力学模型，设计扩张状态观测器，对实时气动加速度进行辨识；然后，针对测量噪声问题，设计了一种非线性微分跟踪器，对