Design And Implementation Of Information Processing Terminal For Shooting System Based On Embedded VxWorks

The projectile is disturbed by many factors during the launch,such as the initial deviation of the muzzle caused by the change of the drug temperature,the average wind speed in the high altitude and the error of the gun,resulting in a systematic deviation between the projectile drop point and the target points,which is difficult to achieve the initial hit or firepower coverage.Therefore,it is necessary to correct the shooting elements by the correction,eliminating the systematic error and improving the precision of the gun shooting.The traditional school-shooting method needs to send the personnel to the near-falling point for observation.The safety is low and the quick-response capability is poor.At present,based on the closed-loop calibration system of the satellite navigation system,the trajectory of the bullet trajectory is measured by the satellite receiver.The measurement data is transmitted to the ground in real time through the wireless communication.The ground information terminal synthesize ballistic measurement information and predict trajectory falling point,sending modified parameters to fire control system to complete calibration.This method has the advantages of good real-time performance,high precision and strong continuity,and so on.It has become one of the research hotspots at home and abroad.The ground information processing terminal is the core link of the closed-loop calibration system,which connects the information hub of the ground data receiver and the fire control system.In addtion,the terminal undertakes many tasks,such as data filtering,drop point prediction,data communication,multitasking,human-computer interaction,etc.According to the above requirements,this paper focuses on the design of the algorithm and software and hardware of the ground information processing terminal.Aiming at the problem of Beidou positioning data filtering and ballistic extrapolation,considering the influence of dynamic equilibrium angle of projectile rotation on the basis of particle trajectory model,the ballistic model of extended particle is established.The data filter adopts extended Kalman filter method to filter out the noise in ballistic parameters.In addition,the ballistic model is used to solve the prediction method of ballistic deviation.Real-time and precision meet the requirements.In order to improve the speed of the school injection,the ground information processing terminal needs to simultaneously shoot multiple projectiles.The Power architecture P1010 processor and Vx Works operating system are selected in order to ensure the reliability of multi-shot projectile.Based on priority task Division,the problem of multitasking information processing can be solved by using two kinds of task scheduling algorithms and simple task design process.The human-Computer information interaction system takes the embedded touch screen as the operating platform.Adopting the Modbus TCP/IP communication protocol,it realizes the ballistic metadata transmission and graphic display of multiple projectiles.Data delay and interface design meet the design requirements.The relevant experimental verification results meet the estimated indicators.