固体运载器主动段气动参数辨识方法

Parameter Identification Method of Aerodynamic Data for Solid Launch Vehicle in Boost Phase

对于主发动机工作段的固体运载器来说,由于气动力相对主发动机推力是个极小的量,因此无论从测量精度还是从力学解耦上说气动参数辨识都是一个难题。采用基于飞行试验数据的主发动机工作段气动特性辨识技术,提出了测量数据处理方法和辨识公式,采用了误差补偿、平滑滤波、数据转化等技术,某运载器的应用结果验证了方法的有效性。

The aerodynamic parameter identification is a difficult problem for solid launch vehicle in boost phase,because the aerodynamic force is much smaller than the thrust of solid rocket motor.A parameter identification method of aerodynamic data for solid launch vehicle in boost phase based on the data of flight test is presented in this paper.The data processing method and identification formula are proposed and some technologies,such as error compensation,smoothing filtering and data transforming,are applied in this paper.The application for a launch vehicle flight illustrates the efficiency of our method.