摘要
升阻比(LDR)是临近空间高超声速飞行器试飞试验时重点考核的指标之一,高精度雷达外测数据是升阻比估计的主要信息源,雷达测量误差到升阻比估计误差之间的传递分析是靶场测控装备论证和试验事后处理需要解决的重点问题。根据高超声速飞行器三自由度运动方程,详细推导了雷达观测到升阻比的变换公式,针对变换高度非线性的问题,采用Unscented变换(UT)实现了对升阻比估计量统计特性的分析,得到了雷达跟踪精度与升阻比精度的误差传递关系。仿真实验表明,文中方法可以实现对临近空间高超声速飞行器升阻比估计误差的分析。
Lift-to-drag ratio（LDR） is one of the most significant indices in the flight-test of vehicles.The main resources of LDR estimation are the high precision radar measurement data.The key problem to be tackled in flight-tests and after-tests disposal is to analyze the error propagation of radar measurement error to the LDR estimation error.This paper derivates the transformation from radar measurements to LDR based on the three-degree-of-freedom（3DOF） hypersonic vehicle dynamic model.To solve the problem of high nonlinear transformation,Unscented Transform（UT） is utilized to estimate the statistics of LDR.Eventually the error propagation from radar tracking data to LDR is obtained.Experiment results illustrate that the method can be applied to the analysis of LDR error estimation for the near space hypersonic vehicle.
出处
《雷达科学与技术》
2012年第2期174-179,186,共7页
Radar Science and Technology
