نتایج جستجو برای: midcourse
تعداد نتایج: 129 فیلتر نتایج به سال:
Adaptive preferential employment of interceptors in midcourse ballistic missile defense is considered. The defense discriminates decoys, with such discrimination characterized by a K-factor, and determines optimal intercepts and salvo structure in shoot-look-shoot scenarios. The attacker's strategy to determine proper allocation of warheads to targets of varying value in the presence of a defen...
Estimating midcourse threats and deriving optimal numbers of decoys produces an integrated picture of the trades between boost-phase attrition, midcourse defenses, and discrimination. Boost and midcourse interceptors can be effective, but are sensitive to light decoys. If discrimination is not available at the outset of deployment, enough interceptors must be purchased to meet both the RVs and ...
As part of the continuing evaluation of the health of Americans, a midcourse review of the Healthy People 2000 objectives (1) added several new objectives and identified changes to some of the objectives released in 1990 (2). The midcourse review also documented numerous previous revisions to Healthy People 2000 baselines (3) and the setting of new targets for some objectives. The purpose of th...
A new missile midcourse guidance algorithm is proposed in this paper. It is a combination of sampling based path planning, Dubins’ curves and classical guidance laws. Moreover, a realistic interceptor missile model is used. It allows to anticipate the future changes of flight conditions along the trajectory, especially the loss of maneuverability at high altitude. Simulation results are present...
In this paper, an optimal guidance law with terminal angle constraint considering the seeker’s lock-on condition, in which the target is located within the field-of-view (FOV) and detection range limits at the end of the midcourse phase, is proposed. The optimal solution is obtained by solving an optimal control problem minimizing the energy cost function weighted by a power of range-to-go subj...
Radar echo of ballistic midcourse target contains unique motion information of the target, which can provide important evidence for target recognition. A wideband radar echo simulation model for midcourse precessional target is developed, where the micro-motion model, electromagnetic scattering calculation and linear frequency modulated (LFM) radar signal model are integrated. Firstly, the posi...
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