The solid sounding rocket is required to achieve the accuracy of the landing point in the kilometer level when carry-ing out the long-range delivery of certain kinds of loads.Because the rocket generally implements effective guidance and control in the active section of the atmosphere,its guidance time is short,and the aerodynamic influence cannot be ignored,so it is very diffi-cult to achieve the accuracy control of the landing point.To solve this problem,an iterative guidance method for solid sounding rocket in atmosphere was proposed.Through online calculation of the residual apparent velocity and apparent position increment,the itera-tive calculation of the solid sounding rocket landing point was carried out to form guidance and control commands.The guidance con-trol is only carried out in the activestage,and the pneumatic compensation is carried out in the reentry stage,which makes the solid rocket landing point control reach a higher precision.Mathematical simulation shows that the accuracy of this method is one order of magnitude higher than that of the traditional perturbation guidance method,which shows the superiority of the proposed iterative guidance method.
pneumatic resistanceapparent velocitydepending on the locationpneumatic compensationiterative guidanceperturbation guidance
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