利用捷联导引头信息实现脉冲比例导引

A Pulsed Proportional Navigation Design Utilizing Information From Strap-down Seeker

在简控条件下实现精确制导是灵巧子弹研制中的重要问题.根据弹载捷联成像导引头和脉冲发动机控制系统的特点,设计了一种基于零效脱靶量概念的直接利用捷联导引头测量信息的末制导方法.该方法通过将速率陀螺和捷联导引头测量信息在速率层面上融合,可在弹体系下得到脉冲比例导引律所需要的制导信号,这避免了在提取惯性系下视线角速率时由不同坐标系多次转换带来的信息损失.利用六自由度动力学模型对末段弹道进行了仿真.结果表明,在理想情况下该文方法可以实现子弹对地面固定目标的精确打击.

Precise guidance under simple control conditions is a key technology for smart submunition design. According to the characteristics of strap-down imaging seeker and impulse jet control system, a high performance, simple and effective terminal guidance method by using the measurement information of strap-down seeker on the basis of the concept of zero effort miss （ZEM） was presented, which utilizes angle information measurement from the seeker directly. The guidance signal that the pulsed proportional navigation requires can be obtained by integrating the measurement information between rate gyro and strap-down seeker on rate level, and then the losing information caused by coordinate transformation for obtaining the line of sight rate in inertial coordinate system is avoided. Based on the six-freedom-degree ballistic equations, the model of air to ground submunition in the terminal guidance stage was established. Result of simulation indicates that under ideal conditions, the method given by this paper is practicable and correct.