超前偏置比例导引律及其实现方法

红外寻制导的导弹只能探测跟踪目标(飞机)的热辐射中心,即发动机尾喷流中心。它离飞机质心有一段距离h,为了有效地杀伤目标,提高杀伤概率,必须使命中点前移一段距离h,为此我们对此进行了研究。本文导出了空间飞行时实现超前偏置的相对运动方程和导引律,并提出简化导引律方案,探讨了控制系统实现的方法。

The Proportional-Navigation Guidance Law for Leading of lmpact Point and its Realizing Method

A proportional-navigation guidance law for leading of impact point in infrared hom- ing gaidance is studied in this paper. For infrared homing guidance only can follow heat seek- ing center of tail fireworks. In order to effectively hit the center of target and increase killing probability, the impact point must move forwardly a length h equal to the distance betwen the tail fireworks to the mass center of torgets. This paper consists of fllowing contents: To begin with, The precise formulas of plane and space proportional-navigation guidance law for leading of tracking point are established. Secondly, The formulas are reduced for convenience in practice. The reduced formulas are calculated and compared with the precise one. The result shows that the proportional-naviga- tion guidance law for leading of impact point surely moved impact point forwards. The reduced formula of guidance law also works properly with little error, which is negligible. This is of im- portance to design infrared homing guidance system.