单通道防空导弹导引头图像的弹旋解耦新方法

单通道防空导弹导引头图像的弹旋解耦问题通常是采用陀螺等硬件装置解决的。提出一种不依赖于硬件装置,直接采用软件算法进行弹旋解耦的新方法。通过分析目标相对于旋转导引头的成像规律,推导出图像反旋补偿的公式,研究了基于图像的角速度估计算法,实现了对自旋角速度的实时跟踪;同时对成像过程中产生的闪烁噪声、抖动噪声等进行了分析,并在角速度跟踪时,采用基于小波滤波与加权平滑的方法进行去噪处理。仿真实验表明该方法具有速度快,精度高等优点,并有效地节约了解耦成本。

New Approach to Decoupling Problem of Imaging Rotation in Single Channel-Controlled Air Defense Missile

In infrared homing seeker of single channel-controlled air defense missile,the hardware devices such as gyro and so on were used to solve the coupling problem of imaging rotation.A new approach was proposed which eliminated the coupling effect by software means.On the condition that the primary optical axis of the seeker was fixed to the missile top,the expressions of imaging compensation were educed by analyzing imaging laws of the moving target relative to the rotating seeker.An estimation algorithm based on the coupling image was used to realize real-time tracking for the angle velocity.After discussing some relative problems such as glint and fabric noises,a filter based on wavelet decomposition and weighted smoothness was utilized.The simulation results show this approach can effectively solve the coupling problem of imaging rotation.