Research On Disturbance Detection System For Rocket Gun Launching Based On LabVIEW

Firing intensity is one of the most important performance of rocket launcher system.The main factors affecting projectile dispersion are initial disturbance,dynamic imbalance,thrust eccentricity,etc.The projectile dispersion is much larger in multi-tube continuous discharge than in multi-tube single-discharge,the main reason is that the velocity and acceleration of the projectile are very large,and the reason of its inertial action,causing the barrel to vibrate violently,the muzzle direction changes,the projectile will deviate from the predetermined position when flying out of the muzzle,and the vibration of the directional beam caused by the forward projectile increases the initial disturbance of the later projectile.Thus,the vibration of the gun becomes the main source of rocket initial disturbance.Aiming at the initial disturbance problem of rocket launcher,a set of rocket launcher launch disturbance detection system is designed in this paper to detect the initial disturbance quantity.The main work of the paper are as follows:(1)Aiming at the problem of firing intensity of rocket launcher weapon,a system for disturbance detection is designed to detect the disturbance quantity.(2)The error source of Micro-Electro-Mechanical System(MEMS)gyroscope is analyzed,and the temperature effect on gyroscope precision is analyzed.The temperature characteristics of the gyro zero point output offset are compensated to ensure the accuracy of data acquisiton and processing.(3)Aiming at the problem that low temperature environment may affect work state of components in the detection device.A temperature detection and heating module was designed based on STM32 single chip microcomputer,and the temperature value in the detection device collected by the temperature sensor is transmitted to the upper computer by wireless communication for the calculation of disturbance quantity.(4)The parameter setting of the data acquisition module in the test system was analyzed in detail,the significance of each parameter was introduced.The parameter values set in the experiment and the basis of parameter setting are also given.(5)The disturbance signal of rocket launcher is analyzed and processed in the software of upper computer based on LabVIEW.The specific functions include obtaining the temperature-gyro zero-point output voltage fitting curve,filtering and processing the disturbance signal and real-time display,and displaying the temperature change curve in the detection device,the waveform data are saved in Technical Data Management Streaming(TDMS)file,and the TDMS file at a specific time is selected for playback.The data processing in the playback process includes the analysis of the time domain and frequency domain of the disturbance signal,the calculation of angular velocity value and the acquisition of angular displacement under temperature compensation.(6)The whole debugging of the rocket launcher disturbance detection system is carried out.Through the analysis and processing of the system operation and collected data,the feasibility and accuracy of the rocket launcher disturbance detection system is verified,and the field test experiment can be completed,which has certain practical value.The innovation points of the paper are as follows:(1)This paper presents a scheme of compensating the zero-offset temperature characteristics of the gyroscope based on the temperature-gyro zero-output voltage fitting curve.(2)Aiming at the influence of low temperature environment on the work of components in the detection device,a temperature detection and heating module is designed,and the temperature data is transmitted by wireless communication to the upper computer for data processing.(3)Based on LabVIEW,a set of upper computer software for online detection and offline playback processing is designed,and the disturbance signal is analyzed and processed.