Abstract:

Aiming at the problem of fluctuation of line of sight rate estimate caused by phased array seeker discrete beam motion, a line of sight rate extraction algorithm is presented, which uses beam angle error compensation. The strapdown phased array seeker discrete beam motion principium is analyzed,and the mathematical model of beam scanning control is proposed. The disturbance rejection transfer function caused by beam angle direction error slope is derived. The method of using beam angle direction error compensation is analyzed and described. The simulation results show that by using beam angle direction error compensation method, the fluctuation of line of sight rate estimate can be effectively eliminated, and the algorithmic validity of decoupling and line of sight rate extraction is proved.