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由地球自转引起的瞄准线漂移是坦克火控面临的棘手问题。提出了一种基于惯性姿态信息的瞄准线漂移抑制方法,借助车载惯导系统,获得瞄准镜的地理坐标和姿态信息,计算出地球自转角速率在瞄准镜坐标系上的分量。伺服系统依此向两个方向的控制通道增加补偿值,由此抵消地球自转的影响,乘员就会感到瞄准线始终对准目标,而不会产生偏离,因而省去了频繁调整的工作。该方法既可用于坦克作战训练,也可用于机载或舰载稳瞄装置的调试。
Line-of-sight drift caused by the Earth’s rotation is a thorny issue for tank fire control. A method of line of sight wander suppression based on inertial attitude information is proposed. With the help of vehicle inertial navigation system, the geodetic coordinates and attitude information of the sight are obtained, and the component of the rotation angular velocity of the earth in the sight coordinate system is calculated. The servo thus adds compensation to the control channels in both directions, thereby counteracting the effects of the Earth’s rotation, allowing occupants to feel their aiming line always aligned with their target without deviating, eliminating the need for frequent adjustments. The method can be used for tank combat training as well as for debugging of airborne or shipborne stationary sighting devices.