论文部分内容阅读
传统的平台导引头可以通过物理跟踪回路直接提取导弹制导所需的视线角速度信息,采用全捷联结构后,导引头失去了直接测量视线角速度的能力,视线角速度需要通过数字计算的方法来提取。针对全捷联导引头精确制导技术工程应用中的问题,首先给出了视线角速度提取方案,推导得到视线角速度估计模型,鉴于估计模型的强非线性,采用强跟踪容积卡尔曼滤波算法对视线角速度进行估计。结合小型空面导弹的典型使用条件,通过弹道仿真对视线角速度估计算法的有效性进行了验证。仿真试验表明:导引头在末制导段捕获目标后,能迅速消除滤波初始误差,准确跟踪真实的弹目视线角和视线角速度变化。为验证将滤波输出作为制导信息的可行性,考虑激光半主动全捷联导引头的典型干扰,用蒙特卡洛打靶方法对导弹制导精度进行了考核,1 000次打靶结果显示,对静止目标的制导精度为0.58 m(CEP),对运动目标的制导精度为0.84 m(CEP),满足精确制导武器的制导精度要求。
The traditional platform seeker can directly extract the line of sight angular velocity information required by the missile guidance through the physical tracking loop. With the all-strapdown structure, the seeker loses the ability to directly measure the line-of-sight angular velocity, and the line-of-sight angular velocity needs to be calculated digitally extract. Aiming at the problems in the application of precision guidance technology for all-strapdown seeker, firstly, the view angular velocity extraction scheme is given and the line-of-sight angular velocity estimation model is derived. In view of the strong nonlinearity of the estimation model, the Kalman filter with strong tracking volume Angular velocity estimation. Combined with the typical conditions of use of small air-to-air missiles, the validity of the algorithm for estimating the line-of-sight angular velocity was verified by ballistic simulation. The simulation results show that the seeker can quickly eliminate the initial filter error and accurately track the change of the true projectile sight line angle and line-of-sight angular velocity after capturing the target at the final guidance section. In order to verify the feasibility of using filtered output as guidance information, considering the typical interference of laser semi-active all-strapdown seeker, the guidance accuracy of missile was evaluated with Monte-Carlo shooting method. The results of 1 000 shots show that for the stationary target The guidance accuracy is 0.58 m (CEP) and the guided precision of the moving target is 0.84 m (CEP), which meets the guidance precision requirements of precision guided weapons.