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.
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。
It is indicated that the low damping mode can augment the norm of the coprime factor perturbation and as a result the domain of the actual admissible perturbation is reduced.
论文中给出了控制器之所以会失去鲁棒性，是因为弱阻尼模态增大了互质因子摄动的范数，从而缩小了模型的实际允许摄动范围。
It is indicated that the low damping mode can augment the norm of the coprime factor perturbation and as a result the domain of the actual admissible perturbation is reduced.
论文中给出了控制器之所以会失去鲁棒性，是因为弱阻尼模态增大了互质因子摄动的范数，从而缩小了模型的实际允许摄动范围。
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