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捷联式(或弹体固联式)能满足很多种战术导弹末制导所需足够视场要求的导引头正接近实用阶段。它较之万向架导引头具有许多优点,主要是可以提高可靠性且瞄准线速率不受限制。而主要缺点是惯性瞄准线速率不能直接用于执行比例导引。为了形成瞄准线速率,导引头的输出须同惯性传感器的测量结合。然而,这样一来由于导引头增益误差而可能出现不稳定。但这一问题可以用高频自适应参量识别法测量校正导引头误差来解决。模拟研究表明,此种系统的性能不低于万向架导引头。本文将探讨捷联式导引头实现比例导引的基本方法和问题并给出高频振动自适应技术的一些性能试验结果。
The strapdown (or projectile-solid) seeker capable of meeting the required field of view for many types of tactical missile end-guidance is approaching the practical stage. It has many advantages over a gimbal seeker, primarily for reliability and unlimited line-of-sight rates. The main disadvantage is that the inertial aiming line rate can not be directly used to perform proportional guidance. To create a line-of-sight rate, the seeker’s output must be combined with the inertial sensor’s measurements. However, this may cause instability due to seeker gain error. However, this problem can be solved by using high-frequency adaptive parameter identification to measure and correct the error of seeker. Simulation studies show that the performance of such a system is not less than the gimbal seeker. This article will explore the basic methods and problems of the strapdown seeker to achieve proportional guidance and give some performance test results of high-frequency vibration adaptive technology.