定高功能最低使用高度研究

Analysis of the Minimum Operating Height in Altitude Hold Mode

研究了飞机最低使用高度、飞行安全性和飞控系统规范;定义了按关键功能和非关键功能设计的自动驾驶仪定高功能的最低使用高度;提出了工程上应以最严重故障发生后飞行员能够将飞机安全拉起且不超过载、不失速的高度损失乘以一定的安全系数,作为按非关键功能设计的自动驾驶仪的最低使用高度;给出了某飞机使用自动驾驶仪在海平面飞行的最低使用高度以及低空使用定高功能的注意事项。

A type of computing the minimum height of aircraft autopilot in altitude hold mode was introduced. According to the airplane speciifcations about minimum operating height, system safety and lfight control system, this paper ifxed the minimum operating height in altitude hold mode of aircraft autopilot which is designed by critical function and noncritical function, and put forward the height as the minimum height of autopilot designed in noncritical function when pilot could pull up the aircraft safely within overload and stall restriction after the most severe failure happened. Furthermore, this article gave an example to apply this method to an aircraft, researched the operating notes when use altitude hold mode in low height for a long time.