| With the changing situation of modern battlefield,the ability of ballistic identification is becoming more and more important in solving the problem of external ballistic safety and dealing with complex and changeable battlefield environment.It is also an important link to achieve effective connecting and reasonable match between trajectory safety and operational mission planning.With the development of ballistic identification technology,the realization scheme based on the strapdown inertial measurement combination has become an important technical approach.But in the high dynamic missile borne flight environment,because of the characteristics of high impact overload and high speed in the process of projectile bore,the inertial components such as gyroscope cannot meet the need.Geomagnetic sensor has many advantages,such as small volume,simple structure,low power consumption,high overload resistance and no accumulation error.It has been applied in trajectory recognition technology research in recent years.On the basis of full investigation,this paper has completed the research of ballistic identification technology based on geomagnetic information.The design of six degree of freedom rigid body trajectory simulation,missile attitude solution development,the position of the trajectory real-time sensing algorithm development,missilestorage test system design,magnetoresistive sensor error calibration and flight test are developed around this technology.This paper firstly introduces the research background and significance of this research and research status at home and abroad in the technical issues related to the research,then determines to adopt the magnetoresistive sensor for measuring geomagnetic component to develop technology of trajectory identification algorithm combined with the acceleration sensor data.According to the problem of verifying the feasibility of the trajectory identification algorithmreal before the flight test,based on the theory of ballistic flight dynamics,six degree of freedom rigid body trajectory simulation technology is developed in this paper,then we complete the ideal signal simulation of missile magnetoresistive sensor and accelerometer.After the completion of the work,this paper proposed trajectory identification technology with magnetoresistive sensor and accelerometer,then develope algorithm of trajectory identification technology in Matlab,including the attitude solution algorithm of real-time sensing algorithm and the identification algorithm of position of the trajectory,and then use the data of six degree of freedom trajectory model to complete the preliminary verification of the algorithm.In order to acquire data output of sensors in real trajectory environment,missile borne storage test system is designed and missile borne flight test is carried out,then sensor data collection and storage in field environment are completed.After the experiment is completed,the experimental data are processed and analyzed,and the algorithm verification is completed.The experimental results show that the range error between the simulated trajectory and the actual ballistic trajectory is less than 1%,and the trajectory identification error of the ballistic identification algorithm and the actual ballistic trajectory is less than 5%,which achieves a certain accuracy and has certain engineering application value. |
