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Identification of rational approximate models inH∞ using generalized orthonormal basis

机译:基于广义正交标准的H∞有理近似模型辨识

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摘要

Robust identification with FIR models fails to be successful when the number of coefficients to be estimated becomes large, caused by lightly damped modes of the plant or poles very close to the unit circle. The paper presents a two-stage algorithm to obtain a low-order approximate model in frequency domain in a generalized orthonormal basis with guaranteed H∞ error bound for deterministic linear time-invariant stable systems, the first stage being an L∞ rational approximation and the second nonlinear step being an H ∞ rational approximation
机译:当要估计的系数数量变大时,FIR模型的稳健识别将无法成功,这是由于电厂或极靠近单位圆的极点的阻尼模式导致的。本文提出了一种两阶段算法,可在确定性线性时不变稳定系统的广义正交标准下,在具有保证的H∞误差范围的情况下,在频域上获得低阶近似模型,第一阶段是L∞有理逼近,并且第二个非线性步骤是H∞有理逼近

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