A PHASE THEORY OF MULTI-INPUT MULTI-OUTPUT LINEAR TIME-INVARIANT SYSTEMS

被引:13
作者
Chen, Wei [1 ,2 ]
Wang, Dan [3 ]
Khong, Sei zhen [4 ]
Qiu, Li [5 ,6 ]
机构
[1] Peking Univ, Dept Mech & Engn Sci, Beijing 100871, Peoples R China
[2] Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
[3] KTH Royal Inst Technol, Div Decis & Control Syst, Stockholm, Sweden
[4] Natl Sun Yat sen Univ, Dept Elect Engn, Kaohsiung, Taiwan
[5] Southern Univ Sci & Technol, Shenzhen, Peoples R China
[6] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China
关键词
phase theory; MIMO phase response; Phi; infty sector; small phase theorem; SPECTRAL VARIATION; GAIN-PHASE; ROBUSTNESS; MATRIX; DESIGN;
D O I
10.1137/22M148968X
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 paper, we define the phase response for a class of multi -input multi -output (MIMO) linear time -invariant (LTI) systems whose frequency responses are (semi -)sectorial at all frequencies. The newly defined phase subsumes the well-known notion of positive real systems and is closely related to the notion of negative imaginary systems. We formulate a small phase theorem for feedback stability, which complements the small gain theorem. The small phase theorem lays the foundation of a phase theory of MIMO systems. We also discuss time -domain interpretations of phase -bounded systems via both energy signal analysis and power signal analysis.
引用
收藏
页码:1235 / 1260
页数:26
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