Determination of the analytical parametric relationship for output spectrum of Volterra systems based on its parametric characteristics

Determination of the analytical parametric relationship for output spectrum of Volterra systems based on its parametric characteristics
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基于Volterra系统参数特性确定输出谱解析参数关系

DOI:
10.1016/j.jmaa.2008.11.007
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发表时间:
2009
影响因子:
1.3
通讯作者:
Jing X
Jing X
中科院分区:
数学3区
文献类型:
--
作者:
Jing X

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Volterra 系统的输出频率响应函数 (OFRF) 可以描述为模型参数的多项式函数。然而,ORFF 的分析确定计算量非常大,特别是对于高阶 OFRF。为了解决这个问题,可以采用数值方法,只要给出该多项式函数的一系列模拟或实验数据。本研究从理论上表明,根据OFRF的参数特性,可以使用简单的最小二乘法准确确定OFRF高达任意阶的解析参数关系,并且还可以明确确定输出频谱的每个特定分量。讨论了为最小二乘法获得独特且准确的解的实用技术。本研究为利用数值方法确定此类系统多项式函数的解析参数关系提供了基础结果。
The output frequency response function (OFRF) of Volterra systems can be described as a polynomial function of model parameters. However, the analytical determination of the OFRF is very computationally intensive, especially for higher order OFRF. To circumvent this problem, a numerical method can be adopted, provided that a series of simulation or experimental data for this polynomial function are given. In this study, it is theoretically shown that the analytical parametric relationship of OFRF up to any order can be determined accurately by using a simple Least Square method and every specific component of the output spectrum can also be determined explicitly, based on the OFRF's parametric characteristics. Practical techniques to obtain a unique and accurate solution for the Least Square method are discussed. This study provides a fundamental result for the determination of the analytical parametric relationship for this kind of system polynomial functions by using numerical methods.
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