Research On Terminal Guidance Under Complicated Detection Environment

With the advancement of technology, modern weapon performance continues to improve, so the future of the space will become increasingly complex operational environment. When using ballistic missile attack, in order to improve the hit probability of ballistic missile targets, will be used to release multiple warheads, decoys release interference, infrared stealth or stealth techniques to fool the enemy interceptors, and because the background at high altitude cause electromagnetic interference, etc., it will make the interceptor detecting environment is very complex.In a complex environment detection, interceptor seeker will receive more than the target point information. Since the end of the initial guidance moment interceptor and the target far away, so the goals will appear in the form of a point target seeker imaging surface. Target interception probe complex environment, traditional solution using the first target to discriminate between true and false target detection and, after identifying the true target again issued guidance commands to the interceptor, the interceptor mobility due to the limitation of the use of this kind of approach is likely to lead to the failure to intercept incoming targ ets. Therefore, the issue has been more in-depth study, the main contents include the following.Firstly, the background and significance of the subject, respectively, to detect complex environment, target recognition, detection of environmental objectives in complex processing method in complex environments homing probe guide policy research status were summarized. And proposed research in complex environments to detect the problem at this stage homing Problems.Next, define the desired coordinate system modeling and gives the mutual relationships of these coordinates. Then bombs were set up single objective- the missile target relative motion equations and multiple objectives- target relative motion equation, and the entire process of the late descriptio n guidance.Then, the paper introduces the concept of the value of the target of interest, so-called target interest value, says the real target is the probability of each target, and the interest calculation method of target values. With real warheads and decoys are different characteristics of the target position, infrared and radar characteristics in terms of characteristic features, first of all, be analyzed separately for each target attribute, select a reasonable degree of membership letter for each p roperty, giving the detected target the real target of quantitative indicators; then, based on the principle of maximizing deviation method, seek weighting of each target property interest in the target value calculation; ultimately, the membership value o f each property resulting weighted sum to give each target value targets of interest.And the calculation target interest value of study.Finally, the method of selecting the four virtual target point are: ignore the impact of the target interest value, the geometric center of gravity of all targets to be selected as the virtual target point; the second is only based on the infrared properties of the target, based on each methods target energy center to determine the virtual target; the target in the third virtual selection process, not only taking into account the geometric distribution of each target point, except that the probability of each target point is the real target will also serve as a virtual selection reference factors goals; four is to determine the objective value of each target point of interest in accordance with Chapter III approach, the interceptor has been making toward all targets of interest in the target value of the maximum target point guide. Finally, with the introduction of target simulation results prove the interest value will increase the probability of success of Interceptors...