Modern Defence Technology 

Abstract: In order to solve the problem that infrared-guided seeker is restricted by side window vision scope,the restriction arithmetic between side window vision scope and attitude was put forward.And according to the demand of missile attitude control with side window detection,the control of attitude angle using variable structure controller was carried out and the vibration problem was solved.In the process of selecting variable structure control parameter,adaptive parameter selecting program was added.The simulation result shows that the system can track expectable attitude angle rapidly with high accuracy.

Abstract: Aiming at health condition assessment problem of equipment,the basic concept of health condition of equipment is expatiated and the grading of health condition of equipment is classified into five types: excellent,good,middle,poor and faultTo the unqualified equipment,the health condition is directly judged to be faultAnd to the qualified equipment,on condition that the health condition of equipment parameters are evaluated,the health condition assessment model based on improved evidence theory is established and the health condition degradation grading of equipment could be got by synthesizing the health condition of all analog monitoring parametersFinally,the experiment result validates the rationality of the assessment model

Abstract: This paper presents a method of establishing the model of radar detection probability.Based on the data of radar flight for test,the method applies radar equation to estimate the detection probability of gridding center.

Abstract: The development of U.S.midcourse antimissile radars in introduced and the new development direction of maneuver deployment of antimissile equipments is pointed out.And then,the distributed aperture coherence-synthesizing radar(DACR) technology is presented.Its some basic concepts are also given including the overseas developing state,battle mode,working principle,technological advantages,etc.Meanwhile,the line-fed and space-fed test system for DACR and the test method are specially designed.The understanding of DACR is deepened by analyzing the result of space-fed test,while the coherence-synthesizing principle and the synthesizing algorithm are verified based on the line-fed tests under the high and the low signal noise ratio(SNR) conditions.