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本文简要地叙述了飞行试验方法,包括地面试验,操纵输入、数据采集系统、数据处理方法——最大似然估计算法,给出了参数估计中所使用的数学模型,包括纵向机体模型和纵向等效机体模型.给出了11个机动飞行的气动参数和模态参数的估计结果,并作了简要的对比分析.试验结果证明,飞行控制系统改善了飞机短周期模态特性;并证明,利用等效机体模型估计带有控制系统飞机的等效气动参数和模态参数是可行的.
This paper briefly describes the flight test methods, including ground test, manipulated input, data acquisition system, data processing method - maximum likelihood estimation algorithm, and gives the mathematical models used in parameter estimation, including longitudinal body model and longitudinal The results show that the flight control system improves the short-period modal characteristics of the aircraft and proves that the use of the Equivalent body model estimation Equivalent aerodynamic parameters and modal parameters with control system aircraft are feasible.