【摘要】 二维的制导律组合,无法实现三维的大着地角要求。基于二维大着地角次最优制导律的制导原理,采用矢量计算的方法,对二维次最优制导律进行了拓展,给出了考虑着地角、脱靶量和控制能量等多约束条件的三维次最优制导律。利用设计所得三维制导律,进行了制导炮弹六自由度全弹道仿真。在初始方位角偏差较大的情况下,将计算结果与另外两种制导律模式进行了比较:纵向横向都使用比例导引律时,所得弹道已经不能满足制导炮弹的要求;纵向使用次最优制导律横向使用比例导引律时,由于ZY面上的弹道倾角要求无法体现,着地角会明显减小,制导精度将受到影响;而使用设计所得三维制导律时,在一定范围内,弹道末段可以在三维空间保持大的着地角,一方面能够满足制导的精度要求,另一方面可以降低需用过载以满足控制要求,提高了制导炮弹的打击效果。更多还原

【Abstract】 The combination of two-dimensional(2D) guidance law can not lead to the large landing angle in 3D space.Based on the guidance principle of 2D suboptimal guidance law with large landing angle,a vector computations method is used to extend the 2D guidance law,thus obtaining the 3D suboptimal guidance law meet constraint conditions such as landing angle,miss distance and control energy,etc.A whole ballistic simulation of six degree-of-freedom is made using the proposed 3D guidance law.The results are compared with that of other two kinds of guidance modes in the case of large windage of original azimuth angle.If the proportional guidance law is used in both horizontal plane and vertical plane,the obtained trajectory can not meet constraints.If the 2D suboptimal guidance law is used in the vertical plane and the proportional navigation is used in the horizontal plane,the landing angle will obviously decrease because the combination mode can not affect the trajectory inclination angle in the ZY plane.But using the proposed 3D guidance law,the large landing angle can be realized in 3D space it can not only meet the guidance accuracy requirement but also the required overload can be decreased to meet the control requirement.Therefore,the hitting effect can be significantly increased.更多还原