空天飞行器性能评估中的等效拟配方法研究

Research on Equivalent Matching Method in Aerospace Vehicle Performance Evaluation

针对空天飞行器的飞行品质评估问题,应用鸽群优化算法提出了一种等效拟配的方法。首先,构建空天飞行器(GHAME)的动力学模型,分析其模型特性;接着,依据飞行品质规范MILF-8785C和MIL-STD-1797A中等效系统准则,使用最小二乘法对频域系统进行等效拟配;最后,针对最小二乘法初值敏感问题,使用鸽群优化算法对等效系统的关键参数进行优化,确定了可行的低阶系统,进而基于失配包络线对两种拟配情况进行验证。结果表明,使用鸽群算法优化后的低阶系统与原高阶系统相比失配度更小,拟配误差满足要求。

Aiming at the flight quality evaluation problem of aerospace vehicles,an equivalent matching method is proposed by using pigeon inspired optimization.Firstly,the dynamics model of aerospace vehicle(GHAME)is constructed and its model characteristics are analyzed.Then,according to the equivalent system criteria in the flight quality specifications MIL-F-8785 C and MIL-STD-1797 A,the least squares method is used to carry out equivalent matching of the frequency domain system.Finally,for the sensitive problem of the initial value of the least squares method,the pigeon inspired optimization is used to optimize the key parameters of the equivalent system,and the feasible low-order system is determined and then the two matching situations are verified based on the mismatch envelope.The results show that the low-order system optimized by the pigeon inspired optimization has a smaller mismatch than the original high-order system,and the matching error meets the requirements.