Frequency domain properties of EALQR with indefinite weighting matrix |
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Authors: | Young?Bong?Seo Email author" target="_blank">Jae?Weon?ChoiEmail author |
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Affiliation: | (1) School of Mechanical Engineering and Research Institute of Mechanical Technology, Pusan National University, 609-735 Pusan, Korea |
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Abstract: | EALQR (Linear Quadratic Regulator design with Eigenstructure Assignment capability) has the capability of exact assignment
of eigenstructure with the guaranteed margins of the LQR for MIMO (Multi-Input Multi-Output) systems. However, EALQR undergoes
a restriction on the state-weighting matrixQ in LQR to be indefinite with respect to the region of allowable closed-loop eigenvalues. The definiteness of the weighting
matrix is closely related to the robustness property of a given system. In this paper, we derive a relation between the indefinite
weighting matrix Q and the robustness property for EALQR. The modified frequency domain inequality, that could be guaranteed
by EQLQR with an indefinite weighting matrix, is presented. |
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Keywords: | Eigenstructure Assignment LQR Frequency Domain Properties Flight Control System |
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