针对被动方式下鱼雷—目标的制导参量不能精确已知而引起的制导精度差的问题 ,本文研究了一种应用于被动式鱼雷上的自适应变结构制导律 ,并对其进行了理论推导和仿真验证。研究结果表明 :该制导律对干扰和参数摄动具有很强的鲁棒性 ,即使目标机动 ,仍然具有很高的命中精度。该算法实现简单 ,便于工程应用。 Aiming at the problem of poor guidance accuracy caused by the fact that the guidance parameter of the torpedo-target in the passive mode can not be precisely known, an adaptive variable structure guidance law applied to the passive torpedo is studied and the theoretical derivation and simulation are carried out verification. The results show that the guidance law has strong robustness to disturbance and parameter perturbation, and still has a high accuracy even if the target is maneuvered. The algorithm is simple and easy to use in engineering.