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Stable LQG controllers

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1 Author(s)
Halevi, Y. ; Dept. of Mech. Eng., Ohio State Univ., Columbus, OH, USA

The optimal LQG controller is known to stabilize the closed loop if certain mild conditions are satisfied. The controller itself, however, may be unstable. The paper presents a method of selecting the weighting and covariance matrices such that the optimal controller is internally asymptotically stable. The method is very easy to apply and for stable open-loop system involves the solution of a single Lyapunov equation

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Automatic Control, IEEE Transactions on  (Volume:39 ,  Issue: 10 )