关键词: 固体火箭发动机;参数识别;参数分析

Abstract: The identification techniques have been widely applied to the field of SRM. But the precise of identified parameter is affeced by many foctors. Among them are the errors of experimental data, the errors of mathematic model, and the errors of material properties in the governing equations, and the unsuitable skills of identification and the unsuitable estimation of initial value of identified parameters and so on.Thus, it is necessary to carry out the creditability analysis of identification results because these results are often inaccurate.The end burning grain in which the long metal wires are embedded is used as a calculation example in this paper. The results indicate that when the deposition and erosion at nozzle throat are not considered, or the characteristic velocity is inaccurate, or the unsuitable skill of identification and the unsuitable estimation of initial value of identification parameter are employed, the results of identification are all inaccurate.The parameters measured and informations obtained in experiment could be employed to check the creditability of identified parameters.

Key words: Solid rocket engine;Parameter recognition;Parameter analysis