A new LQG/H∞ model reduction method for large scale systems is given in this paper. Properties in both time domain and frequency domain are considered,hence the reduction in statespace form has advantages in keeping the frequency stability and it has a less LQG error.
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刘频,王正志,张良起.大系统的 LQG/H∞优化模型降阶[J].国防科技大学学报,1991,13(2):27-31. Liu pin, Wang Zhengzhi, Zhang Liangqi. Large-scale Systems: LQG/H∞ Optimal Model Reduction[J]. Journal of National University of Defense Technology,1991,13(2):27-31.