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Dynamic gradient approaches to compute the closest unstable equilibrium point for stability region estimate and their computational limitations

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1 Author(s)
Jaewook Lee ; Dept. of Ind. Eng., Pohang Univ. of Sci. & Technol., Kyungbuk, South Korea

The reflected gradient method and the Newton trajectory method are approaches to compute the closest unstable equilibrium point (UEP) for stability region estimation. We address the computational issues involved in these methods. We first suggest a dynamic gradient approach as a unified and extended version of these methods. Then, we show that computing the closest UEP using the dynamic gradient approach can be infeasible.

Published in:

Automatic Control, IEEE Transactions on  (Volume:48 ,  Issue: 2 )