An Compensation Method for Phase Time Delay of Laser Semi-Active Seeker

According to the fact that of phase delay in semi-active laser seeker, this paper presented a method for integrating laser detection and servo control, compensating for tracking delay. By using the rising edge of the reference signal to control the sampling time of each sensor,achieving group delay locking.Table loop composite correction ,tracking loop observation compensation ,and α-β filtering are used to reduce time delay and improve system stability and dynamic performance . The results of Simulaiton indicated that the stable loop bandwidth is greater than45°, the greater than 6dB, and the step response index of the tracking loop is better than that of the traditional tracking loop, the system delay is optimized and compensated, with good dynamic performance.