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A tracking guidance scheme based on nonlinear model predictive control is proposed for low-thrust transfer trajectory. According to the optimal nominal transfer trajectory, the NMPC is used to design the predictive model of perturbed orbit. Performance index of receding optimization is established, which can indicate the difference between the nominal trajectory and prediction trajectory. Taking the...
EFP has already been used broadly in long distance anti-armor weaponry systems, and we try to use it to deal with the unexploded aero-ammunitions under the ground, and the design of EFP is the sticking point. We analyze the factors that affect jetting projectile formation of the shaped charge through numerical simulation. Grey relative degree of each factor is obtained through grey relational theory...
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