Assessing the handling qualities of military aircraft, it requires using a low order equivalent system to substitute for the high order aircraft system.
评价有人驾驶飞机的操纵品质，要求将高阶飞机系统用一个动态特性等效的低阶系统来代替。
The methods of parameters identification are analyzed and low-order equivalent system is identified by frequency domain maximum likelihood method and least square method.
分析了等效系统参数辨识方法，采用最小二乘法与频域极大似然法求解先进飞机的低阶等效系统。
The results indicate that the aircraft has excellent lateral and directional flying qualities, and the low-order equivalent which match the high-order real system has an acceptable tolerance.
等效拟配系统具有很小的失配度，能够真实的反映出该型飞机的横航向品质特性。
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