激光驾束制导仪中调制盘的设计

介绍了激光驾束制导仪中调制盘的空间编码原理,阐述了调制盘的设计过程,采用单调制盘来缩小驾束制导仪的体积和重量。考虑到制导仪器实际工作的各种因素,设计了调制盘内、外码道的宽度,起止位置和5种频率值。给出了调制盘确定偏航信息的原理,表征导弹位置信息的调制系数和频率的计算方法。针对调制盘两场交接处的误码问题,提出了变角度设计方法,将各频率沿径向方向旋转45°,从而保证了5 ms的场周期,提高了制导精度。

Design of modulation disk for laser-beam riding guided sighting instrument

The spatial encoding principle of the modulation disk in a laser-beam riding guided sighting instrument is introduced.The design procedure of the modulation disk is described,and a single disk is selected to reduce the volume and weight of the guided sighting instrument.By considering every influencing factor of guided sighting instrument,the width,start-stop positions of inner and outer code paths and five kinds of frequencies are designed.The principle of defining deviation information,modulation coefficient characterizing the position information of a missile and the method of computing frequency are given.To avoid error codes of two fields′ alternation,the design method to change angles is presented to rotate every frequency pattern 45° along the radial of the modulation disk.Experiments show that the method ensures the field cycle of 5 ms,and improve the guided precision.