提出了基于H2范数的系统降阶准则，并且利用遗传算法实现了基于该准则的系统降阶。
The reduced order modeling, which is in H2 norm criterion, is put forward, and the method to resolve it based on genetic algorithms is obtained.
作为大系统鲁棒滤波研究，本文利用线性矩阵不等式得到了一个新的线性系统降阶鲁棒滤波算法。
A new reduced-order robust filtering method for linear system is derived based on linear matrix inequation methods.
在此基础上，提出并研究了非线性系统降阶观测器的设计问题，给出了降阶观测器的具体设计方法。
On the base, the design problem of order-reduced observers for nonlinear systems is presented and studied, the actual design is method is also given.
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