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Comments on the computation of interval Routh approximants

机译:关于区间Routh近似值的计算的评论

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摘要

In Bandyopadhyay et al. (1994, 1997), the Routh approximation method was extended to derive reduced-order interval models for linear interval systems. In this paper, the authors show that: 1) interval Routh approximants to a high-order interval transfer function depend on the implementation of interval Routh expansion and inversion algorithms; 2) interval Routh expansion algorithms cannot guarantee the success in generating a full interval Routh array; 3) some interval Routh approximants may not be robustly stable even if the original interval system is robustly stable; and 4) an interval Routh approximant is in general not useful for robust controller design because its dynamic uncertainties (in terms of robust frequency responses) do not cover those of the original interval system
机译:在Bandyopadhyay等人中。 (1994年,1997年),扩展了Routh逼近方法,以导出线性区间系统的降阶区间模型。在本文中,作者表明:1)高阶间隔传递函数的间隔Routh近似值取决于间隔Routh展开和求逆算法的实现; 2)区间Routh扩展算法不能保证成功生成完整的区间Routh数组; 3)即使原始区间系统是鲁棒稳定的,某些区间Routh近似值也可能不是鲁棒稳定的;和4)区间Routh近似值通常对于鲁棒控制器设计没有用,因为它的动态不确定性(就鲁棒频率响应而言)不包括原始区间系统的不确定性

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