Bures–Wasserstein距離に基づくLMI制約付き可制御性グラミアン整形
A Controllability Gramain Shaping with LMI Constraints under Bures--Wasserstein Distance
可制御性グラミアンを所望の形に整形する制御器設計法を提案し、Bures–Wasserstein距離を用いて最適化問題を定式化、LMIによる半正定値計画として解くことで計算効率を向上させた。
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著者: Koju Nishimoto, Yuki Onishi, Riku Funada, Mitsuji Sampei
分類: math.OC, eess.SY
原文アブストラクト
This paper proposes a controller design method for shaping the controllability Gramian into a desired form to design the effect from exogenous inputs to the system state. Using the Bures--Wasserstein distance, we formulate the shaping problem as the minimization of the distance between the system Gramian and a desired Gramian, and the objective function is shown to be strictly convex on the set of symmetric positive definite matrices. In addition, by deriving a semidefinite programming formulation via a linear matrix inequality (LMI), computational efficiency is improved and additional LMI constraints can be incorporated. When the exogenous input is modeled as Gaussian white noise, the proposed framework is closely related to $H_2$ control, which can be interpreted as a special case of optimal transport. Numerical examples demonstrate anisotropic controllability design for a guidance robot and verify the ability to impose additional directional constraints through LMIs. The numerical examples also confirm that the proposed method approaches $H_2$ control as the desired Gramian tends to zero.