Fitting analysis method for sampling signals of multi-port system

Abstract

The invention relates to the technical field of signal processing, in particular to a fitting analysis method for sampling signals of a multi-port system. The method comprises the following steps: sampling at each port of the multi-port system for the same times, and respectively constructing Hankel matrixes by using sampling data; arranging the Hankel matrixes corresponding to the ports in rows in sequence to form a Hankel block matrix, and performing singular value decomposition to obtain characteristic values; determining the number of characteristic values playing a dominating role according to the sizes of the characteristic values, and performing order reduction processing on the Hankel block matrix; and analyzing a matrix bundle formed by the matrix subjected to the order reduction processing, solving a characteristic value of the matrix bundle, and obtaining a residue of each port by adopting a least square method. According to the method, the port transient signal of the multi-port system is evaluated, meanwhile, the method has the advantages that the analysis process is simple, and the port signal is completely reserved, and when the method is applied to the fields of communication, electric power, control and the like, the efficiency and goodness of fit of transient characteristic evaluation and equivalent modeling of a complex equipment port can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a fitting analysis method for sampling signals of a multi-port system. Background technique [0002] Power, communication, control and other systems usually have complex geometric structures and a large number of internal components. In the process of analyzing their transient response characteristics, it is very time-consuming to fine-tune the whole or part of the structure. and error-prone. However, in many cases, when we analyze the transient characteristics of a complex system, we often mainly focus on the performance at the port where it interacts with the outside world, and regard the system as a whole as a "black box". Efficiency modeling is used to analyze the transient response of the system. In order to achieve this purpose, various techniques of equivalent modeling analysis are proposed and used. Among them, the method of analyzing the limited sampling dat...

AI Technical Summary

Problems solved by technology

However, although the vector fitting technique has good fitting accuracy, it needs a starting pole that can be obtained through multiple iterations before the formal analysis, which is not conducive to improving the computational efficiency of the algorithm

[0003] For the multi-port situation, people in the prior art have proposed a MPM with a common pole to deal with the multi-port data fitting problem, but the proposed method needs to first superimpose the sampling signals of the ports, which inevitably leads to It leads to the lack of information carried in the sampling signal, and the conjugate symmetry condition of common poles and residues cannot be automatically realized during the analysis process, which increases the difficulty of the analysis process

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