九门鉴相器具有许多优点,如鉴相范围宽且同时鉴频鉴相等。所以前些年自从在“国外空间控制技术”上刊载以来得到了广泛地采用。在我们开始预研的机载相位控制位置系统中,最初也选用了此鉴相器,在试验过程中,在我们的系统中发现有如下两个问题。 The nine phase detector has many advantages, such as wide range of phase discrimination and equal frequency discrimination. Therefore, a few years ago, it has been widely adopted since it was published in “foreign space control technology”. The Phase Detector was originally selected for use in our pre-researched airborne phase-controlled position system. During testing, we found the following two problems in our system.