Research on Total Error of Anti-Radiation Missile against Target Radiation Source Shutdown

2011 ◽  
Vol 63-64 ◽  
pp. 47-50
Author(s):  
Long Jie Zhang ◽  
Xiao Fang Xie ◽  
Jie Liang ◽  
De Dong Li ◽  
Jian Cao

This paper established the total error model of Anti-Radiation Missile under condition of target radiation source shutdown, which includes three dimensional passive location error model using information of azimuth and elevation angle as well as their changing rates, and gyroscope drift error model of Strap-down Inertial Navigation System. By analyzing the three dimensional passive location method to moving emitter using single stationary observer, the paper had a research to the hit probability of Anti-Radiation Missile under various flying conditions. If higher hit probability is required, the missile should increase its azimuth and elevation angle as much as possible while not to overstep its attack angle. Simulation result showed that the shutdown occasion of radiation source did much influence to the hit probability of Anti-Radiation Missile, which has great meaning to improve he bat efficiency of Anti-Radiation Missile.

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Xixiang Liu ◽  
Xiaosu Xu ◽  
Yiting Liu ◽  
Lihui Wang

In the initial alignment process of strapdown inertial navigation system (SINS), large initial misalignment angles always bring nonlinear problem, which causes alignment failure when the classical linear error model and standard Kalman filter are used. In this paper, the problem of large misalignment angles in SINS initial alignment is investigated, and the key reason for alignment failure is given as the state covariance from Kalman filter cannot represent the true one during the steady filtering process. According to the analysis, an alignment method for SINS based on multiresetting the state covariance matrix of Kalman filter is designed to deal with large initial misalignment angles, in which classical linear error model and standard Kalman filter are used, but the state covariance matrix should be multireset before the steady process until large misalignment angles are decreased to small ones. The performance of the proposed method is evaluated by simulation and car test, and the results indicate that the proposed method can fulfill initial alignment with large misalignment angles effectively and the alignment accuracy of the proposed method is as precise as that of alignment with small misalignment angles.


Author(s):  
S. V. Andreyev ◽  
V. V. Ilinykh ◽  
O. A. Ilinykh ◽  
M. S. Chertkov ◽  
A. V. Klyuchnikov

The study describes a mathematical error model of a platformless inertial navigation system and focuses on using Allan variance as a method for estimating such instrumental errors of sensors, such as zero signal bias instability, angle random walk and rate random walk. The paper shows the results of the work of the mathematical error model, the model being constructed using the estimated instrumental errors of a sample of sensor assembly which consists of three ring laser gyroscopes and a three-axis accelerometer unit.


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