Measurement Of Stable Scanning Parameters Of Terminal-sensitive Projectile Based On MIMU

Terminal-sensitive projectile is shorter form of terminal sensitive ammunition,which is used for attacking top-armor of armored vehicles. It is urgent to solved in research of terminal-sensitive projectile that how to getthe parameters of terminal-sensitive projectile in the stable scanning stage. In this thesis the measurement of the parameters of terminal-sensitiveprojectile in the stable scanning stage is based on MIMU.According to the motion characteristics of Terminal-sensitive projectile we raise a approximation solve method based on the traditional integrate solution method.The main work of this thesis as follow:（1）The approximation solve method and the integrate solution method is proposed.The traditional integrate solution method gets the parameters from the solved result of the triaxial gyro data. But the error of the method,which accumulates rapidly during the integration, is very large. The characteristics of terminal-sensitive projectile include the 4~6r/s scanning angle speed, little autorotation of projectile axis and very small change of the scanning angle. According to this, we deduce the the approximation solvemethod by approximating the equation of the integrate solution method.（2）The error calibration of MIMU is proposed in this part. For the MIMU with large range gyroscope, a simplified error model is established. Bythe rate experiment and the position experiment, we get the coefficients ofthe error model and analyze the error.（3）The hardware design and the software design is proposed in this part. On the basis of storage measurement technology, we design a small size,low-power circuit and programme the upper-computer software by LabVIEW. In the experiment the MIMU is placed in the projectile. The acquired data will be read to the upper-computer after the experiment.（4）The actual bomb-dropping experiment of terminal-sensitive projectile is proposed in this part. We get the data of MIMU during the experiment.The data is solved by the approximation solve method and the integrate solution method separately. Then results of the two method is compared.Finally，it is proved that the approximation solve method is better thanthe integrate solution method in precision by comparing the results. The approximation solve method can meet the requirement of measurement of stablescanning parameters of terminal-sensitive projectile.