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建立靶弹典型动力学模型结构,靶弹六自由度动力学数学模型简化为纵向和侧向两个三自由度的动力学模型。选择了辨识输入数据,将传统的模型辨识方法与现代计算机技术相结合,对气动力辨识输入参数进行了分析,采用迭代算法得出辨识参数,并对辨识精度进行了分析,认为观测量测量误差、物理几何参数误差影响辨识精度,选用靶弹现有试验测量数据作为输入量,进行气动参数辨识,得出辨识结果,将辨识得到的气动参数带入弹道仿真程序进行了仿真,验证了辨识结果满足设计要求。
The model of target kinetic model is established. The kinematic model of six degrees of freedom of target projectile is simplified to two three-degree-of-freedom dynamic models in longitudinal and lateral directions. Choose to recognize the input data, combine the traditional model identification method with modern computer technology, analyze the input parameters of aerodynamic identification, use the iterative algorithm to derive the identification parameters, and analyze the identification accuracy, and consider the error of the measurement of the observation , The errors of physical geometry parameters affect the identification accuracy. The existing experimental measurement data of the target bombs are selected as the input variables, and the aerodynamic parameters are identified to obtain the identification results. The identified aerodynamic parameters are brought into the ballistic simulation program to simulate and verify the identification results Meet the design requirements.