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本文从简化六自由度弹道计算模型出发,直接以各气动系数作为拟合参数,对靶板试验数据进行处理,可以辨识出那些对角运动贡献较大的气动系数。文中介绍了一种带一次梯度收敛保护的拟Newton—Raphson迭代方法,提出了辨识灵敏度的概念。被拟合系数组合灵活,可充分利用靶板试验所提供的信息。与SRC的同类产品相比,本文完成的软件NYC收敛精度高,而且应用上有更多的优越性。由于靶板试验所需代价低廉,本文的工作具有较大的应用价值。
Based on simplifying the six-degree-of-freedom trajectory calculation model, the aerodynamic coefficients are directly used as the fitting parameters to process the target plate test data, and the aerodynamic coefficients contributing to the diagonal motion can be identified. In this paper, we propose a quasi-Newton-Raphson iterative method with first-order gradient convergence protection and propose the concept of identification sensitivity. The fitted coefficient combination is flexible and can take full advantage of the information provided by the target test. Compared with the similar products of SRC, the software NYC of this paper has high convergence precision and has more advantages in application. Due to the low cost of the target plate test, the work of this paper has greater application value.