基于全局敏度方程方法的飞机方案优化设计

 针对飞机方案分析模块之间存在耦合关系，从而使方案分析需要迭代求解这一特点，采用全局敏度方程方法计算参数之间的敏度，以克服差分方法所带来的高费用和不精确问题。该方法本身具有递归和并行特点，使得其与数值优化方法结合起来特别适合于像飞机这类复杂的内部耦合系统的优化。给出了该方法与约束变尺度法结合，用于某假想的喷气教练机方案优化的简单算例以及用于某4座公务机方案优化的实例。

AIRCRAFT SCHEME OPTIMIZATION DESIGN BASED ON GLOBAL SENSITIVITY EQUATION METHOD

Corresponding to the characters of coupling among comprising modules of aircraft scheme analysis model and iteratively solving of scheme analysis, the global sensitivity equation(GSE) method is adopted to compute sensitivity derivatives with respect to design variables, which can avoid the high cost and inaccuracy of finite differencing performed on the entire scheme analysis. The GSE method is inherently recursive and parallel, making its combining with numeric optimization methods specially suit for the optimization of complex, internally coupled systems like aircraft. A simple example of a hypothesized jet trainer scheme optimization and a practical example of a 4 seat commuter scheme optimization using the combination of the GSE method and the constrained variable metric method are given.