Classification of inverse problem of solid launch vehicle flight dynamics

To decrease the analytical difficulty and the solving complexity of the inverse problems in the development of the solid launch vehicle flight dynamics, the classification of inverse problems was investigated. By studying the characteristics of the solutions the inverse problems were divided into three classes which were described clearly by formulations. Further, two basic solving methods were proposed, which were analytical method and optimization method. Analytical method is used to solving inverse problem quickly and the precision of the solution is usually low. Optimization method is used for high precision of the solution and the calculation is usually a long time. The typical engineering problems corresponding to three classes were analyzed. The three typical problems are the required thrust design of the main engine, external force identification and error separation. The analysis and the results of the problems indicate that the classification is reasonable.