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Paper detail

Quadratic Constraints for Local Stability Analysis of Quadratic Systems

This paper proposes new quadratic constraints (QCs) to bound a quadratic polynomial. Such QCs can be used in dissipation ineqaulities to analyze the stability and performance of nonlinear systems with quadratic vector fields. The proposed QCs utilize the sign-indefiniteness of certain classes of quadratic polynomials. These new QCs provide a tight bound on the quadratic terms along specific directions. This reduces the conservatism of the QC bounds as compared to the QCs in previous work. Two numerical examples of local stability analysis are provided to demonstrate the effectiveness of the proposed QCs.

preprint2022arXivOpen access
Shih-Chi LiaoMaziar S. HematiPeter Seiler
Systems and Controleess.SYmath.OCmath.DS
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Shih-Chi LiaoMaziar S. HematiPeter Seiler

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