【摘要】 基于变结构控制理论 ,提出了一种迎面拦截目标的变结构导引律 ,用于水下防御。该导引律在引入理想的视线角基础上 ,在理论上不仅能保证脱靶量为零 ,而且能同时达到迎面拦截目标的目的。应用研究表明 ,该导引律不仅具有很好的鲁棒性 ,而且具有脱靶量小、拦截时间短的优点更多还原

【Abstract】 In sea battles, it is increasingly imperative for naval ships to intercept torpedoes very quickly and minimize the “miss” distance. We present eq.(5) as a head on impact variable structure guidance law that can do this job better than previous guidance laws. Eq.(5) can ensure that both “ ” and “ q-q d ” in eq.(4) approach zero in very short time, thus ensuring theoretically that “miss” distance is zero and interception is head on impact respectively. “ q d ” is the desired line of sight (LOS) angle needed to achieve head on interception and its value is determined by eq.(3). In order to evaluate the performance of eq.(5) in underwater defense, we took a numerical example whose principal figures are assumed to be: error of relative distance=10%, error of Doppler velocity=10%, error of bearing of target=1°, sampling interval=0.1s. We employed Monte Carlo simulations to obtain Table 1 and Fig.2, which show preliminally that eq.(5), the guidance law presented, possesses superior performance.更多还原