| The parameters of the blast wave generated by the warhead explosion are important bases for evaluating the damage power of weapons.At present,ICP sensor is often used in ground shock wave test and pen structure sensor is often used in free field shock wave test.When the shock wave front passes by,the posture of the tester and the pen structure free field sensor will change the shock wave flow field,thus affecting the accuracy of the shock wave test results.In this paper,the influence of the change of sensor attitude on the shock wave overpressure test is simulated and verified by experiments.The experimental attitude data were processed by an optimized kalman filter to improve the accuracy of the data.Respectively on the ground shock wave overpressure test and free field in the process of the shock wave overpressure test posture sensor characteristics were analyzed,and several typical form,the attitude of the sensor is studied emphatically by FLUENT fluid simulation software on the tester and the free field sensor modeling,shock wave,respectively,simulation of sensor changes pitching Angle and yaw Angle and vibration caused by sensors convex or concave on flow field,the influence of shock wave observation sensor installation structure around the distribution of flow field,combined with the factors which affect the position of the sensor suppression measures are put forward.The structure of the tester was modeled by MATLAB to realize the visualization of the attitude of the tester,and the changes of the attitude of the tester in the explosion process could be visually observed.Finally,the test results of ground shock wave test and free-field shock wave test with suppression measures are verified by the warhead field experiment,and the test results of artificial sensor Angle change are compared with the test results under normal conditions.The results show that the data comparison results are consistent with the simulation conclusion. |
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