卡尔曼平滑在动态推力测量中的应用

THE APPLICATION OF KALMAN SMOOTHING TO THE MEASUREMENT FOR DYNAMIC THRUST

本文首次将卡尔曼平滑应用于固体火箭发动机地面热试车时的动态推力测量,提供了一个便于工程应用且有较高精度的动态推力测量新的数据处理方法。首先,根据固体火箭发动机理论推导出了推力的动态模型;研究了噪声方差和初始条件的确定方法及估计的稳定性、敛散性。继而进行了数字仿真试验,并对实际发动机推力采样数据进行了处理。分析与处理结果表明:卡尔曼平滑应用于动态推力测量是行之有效的。

In this papsr, the kalman smoothing is, for the first time, employed to the measurement of dynamic thrust for solid rocket motor (SR.M). An entirly new method of data processing which is practical and high accurate is presented for the measurements. First, the dynamic model about thrust is achieved according to SRM theory, a survey is also made for adaptive estimation of noise variances, determination of initial parameters and estimator performance. Then, computer simulation and actual application are conducted. The results from them are satisfactory and indicate that the application of Kalman smoothing to the measurement for dynamic thrust is successful.