利用会聚区隐蔽解算目标运动要素的方法

在浅海,当被动声纳探测到目标后,由于舰艇间不断的运动,测得的目标方位随时间的不同而不断地发生变化,利用目标方位的变化,通过纯方位法和滤波估计等方法可解算出目标的运动要素.当声纳利用深海会聚区的声学效应在远距离上探测到目标时,因舰艇被动声纳在隐蔽条件下往往只能测得目标的方位,此时的目标方位随着时间的不同变化很小,难以利用浅海的解算方法求出目标的运动要素.为解决这一问题,基于对深海会聚区声学效应的分析,提出了利用会聚区宽度等特点,采用本舰艇合理机动的方式,来求解目标的运动要素的方法.通过对本舰艇各种可能机动方式的建模和计算机仿真计算的结果可见,该方法可行,且在第一、第二会聚区效果明显.

Method of Calculating Hiddenly Target Motion Factors by Using Convergence Zone

When the passive sonar detects the objects in the shallow sea,the direction of arrival will vary with the time because of the warship's continual movement.If we take advantage of this variety,the motion factor of the objects can be made out through the bearing-only method or the method of filtering estimation.When the sonar detects the objects in a far distance by using the acoustical effect in the convergence zone of the deep sea,it's difficult to get the objects' motion factor by the calculation way which is used in the shallow sea because the warship's passive sonar only can obtain the objects' bearing in an hidden position,and the objects' bearing vary very little with the time simultaneously.In order to solve this problem,we put forward a method to calculate the objects' motion factor,which adopts own-ships' reasonable movement modes and is based on the analysis of the deep convergence zone's acoustical effect and the consideration of the width features of convergence zone.Through the modeling of own-ships' all possible mobile modes,and the results of computer simulation,we can see that this method is reasible,and it has evident effect in the No.1 and the No.2 convergence zones.