Numerical Computation for Solving Algebraic Riccati Equations of Weakly Coupled Systems

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  • 弱結合システムに対するリカッチ代数方程式を解くための数値計算法
  • ジャク ケツゴウ システム ニ タイスル リカッチ ダイスウ ホウテイシキ オ トク タメ ノ スウチ ケイサンホウ

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Abstract

In this paper, an algorithm for solving the algebraic Riccati equation (ARE) that has an indefinite sign quadratic term related to weakly-coupled large scale systems is investigated. A novel contribution is that a new iterative algorithm is derived by combining Newton's method and the fixed point algorithm. As a result, for sufficiently small ε, we can obtain the ARE solution with a quadratic convergence rate. Moreover, it is possible to calculate the ARE solution by the same dimension of each subsystem. As another important feature, the algorithm for solving the filtering ARE is also discussed. Finally, in order to demonstrate the efficiency of the proposed algorithm, the numerical example is given.

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