Calculation of specific impulse of solid rocket motor based on visual acceleration

Based on telemetry visual acceleration,the calculation models of thrust and specific impulse were established,and the effect of the additional mass on the thrust was taken into account.The thrust and specific impulse of solid rocket motor during flight process were calculated by using the model.The calculated results were compared with re-predicted results by standard internal ballistic program.Two kinds of calculation results are consistent.The calculation examples show that the model is available and practicable,and the method can be used for correctly reconstructing real-time thrust and specific impulse,which is applicable for rapid analysis and assessment of solid rocket motor flight test results.