航空发动机ZP/LTR方法稳定性分析及改进

分析了零点配置/回路传函恢复(ZP/LTR)方法稳定性, 给出并证明了其稳定性条件.但该条件较为苛刻, 限制了ZP/LTR方法的应用.为了对ZP/LTR方法改进, 在设计过程中引入了Kal man滤波器, 通过选取特殊的参数, 使Kal man滤波器回路逼近并取代原目标回路, 从而在保留ZP/LTR方法性能的同时, 通过保证Kal man滤波器回路的稳定性保证了最后闭环系统的稳定性.给出并证明了改进后的ZP/LTR方法的稳定性条件, 指出改进后的ZP/LTR方法的稳定性条件较为宽松, 拓宽了原ZP/LTR方法的应用范围. 

Stability analysis and improvement of ZP/LTR method of aeroengine

Zero placement/loop transfer recovery(ZP/LTR) method was analyzed theoretically to find and demonstrate the conditions of stability.However,these strict conditions have placed constraint on the application of ZP/LTR method.Kalman filter was thus introduced for the purpose of improvement of ZP/LTR method.With some special parameters selected,Kalman filter loop could approximate and replace original target feedback loop(TFL).While the performance of ZP/LTR method is maintained,the stability of final closed-loop system could be guaranteed along with the stability of Kalman filter loop.The stability conditions of improved ZP/LTR method was presented and demonstrated,showing that the stability conditions of improved ZP/LTR method were less strict,thus expanding the scope of applications for original ZP/LTR method.