Frequency-Interval Model Reduction of Bilinear Systems

被引:37
作者
Shaker, Hamid Reza [1 ]
Tahavori, Maryamsadat [2 ,3 ]
机构
[1] Aalesund Univ Coll, Fac Engn & Nat Sci, NO-6025 Alesund, Norway
[2] Aalborg Univ, Dept Elect Syst, DK-9220 Aalborg, Denmark
[3] Univ London Imperial Coll Sci Technol & Med, Dept Elect & Elect Engn, London, England
关键词
Bilinear systems; frequency-interval; generalized Lyapunov equation; gramians; model reduction; WEIGHTED BALANCED TRUNCATION; ORDER REDUCTION; TIME;
D O I
10.1109/TAC.2013.2295661
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this technical note, a new method for model reduction of bilinear systems is presented. The method is developed in particular for many applications in which one is interested to approximate a system in a given frequency-interval. To this end, new generalized frequency-interval gramians are introduced for bilinear systems. It is shown that these gramians are the solutions to the so-called frequency-interval generalized Lyapunov equations. The conditions for these equations to be solvable are derived and an algorithm is proposed to solve such equations iteratively. The method is further illustrated with the help of an illustrative example. The numerical results show that the method is more accurate than its previous counterpart which is based on the ordinary gramians.
引用
收藏
页码:1948 / 1953
页数:6
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