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Structure of model uncertainty for a weakly corrupted plant

机译:弱损坏工厂的模型不确定性结构

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In this paper, we investigate the structure of the transfer function set which includes all the transfer functions deduced from the plant available information. It is shown that when an upper bound of the plant transfer function's H/sup /spl infin//-norm has been supplied, and the noise contaminating the time domain identification experiment data is not too significant, such a transfer function set can be parameterized by a linear fractional transformation of two transfer function matrices. One of them is a fixed transfer function matrix which is completely determined by the plant available information and the noise magnitude. The other is a norm bounded, structure fixed, free transfer function matrix. Moreover, it is shown that the problem of analytically obtaining the fixed complexity nominal model that best approximates this transfer function set is as difficult as the /spl mu/-synthesis problem.
机译:在本文中,我们研究了传递函数集的结构,其中包括从工厂可用信息中推导的所有传递函数。结果表明,当提供了植物传递函数的H / sup / spl infin //-范数的上限,并且污染时域识别实验数据的噪声不太明显时,可以对这种传递函数集进行参数化通过两个传递函数矩阵的线性分数变换。其中之一是固定传递函数矩阵,该矩阵完全由工厂可用信息和噪声幅度确定。另一个是范数有界,结构固定的自由传递函数矩阵。此外,它表明,解析地获得最近似该传递函数集的固定复杂性标称模型的问题与/ spl mu /合成问题一样困难。

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