制导炸弹半实物仿真系统误差对仿真结果的影响

Influence of Guided Bomb Hardware-in-loop Simulation Error on Results

In the process of guided bomb hardware-in-loop simulation test,the difference among pitch angle simulation results of the same bomb is larger,and the difference between pitch angle telemetering results and simulation results is also larger by one batch guided bomb,but the convergence of pitch angles is consistent,and the tested miss quantity and the simulated miss quantity are also consistent. Aiming at this problem,the error propagation theory of guided bomb hardware-in-loop simulation system was established based on the covariance analysis describing function technique(CADFT). The simulated attitude angle errors were calculated as well as the errors of attitude angle velocity. The influence caused by simulated attitude angle errors and attitude-velocity errors on simulation results was analyzed. The result shows that the aerodynamic force error and aerodynamic torque error are the main reasons causing the difference among pitch angle simulation results. The dynamic verification method by attitude angle isn’t suit for guided bomb simulation model,but the static verification method by miss quantity is suitable.