试飞确定电传飞控系统稳定裕度

根据飞控系统稳定裕度的要求，给出了几种求取稳定裕度的方法，尤其是提出的基于返回误差阵奇异值的稳定裕度判定方法，可解决多通道多回路复杂交联系统的稳定裕度评价问题。

The Determination of Fly-by-Wire Flight Control System Stability Margin in Flight Test

Based on the requirements for flight control system stability margin. Especially a new method, derived from the minimum singular value concepts of return difference matrix (RDM), can be applied to the flight validation of multi channel/loop complex system stability. Furthermore, basic element determining open /close loop system frequency response by using frequency sweep technique, involved in a variety of methods, is fully verified to be correct, through both manual and automatic frequency sweep at different input position in the control loop with BW 1 variable stability aircraft. So that the various methods of measuring stability margin are ensured to be effective and feasible.