Multi-channel frequency response analysis system and method thereof

Abstract

The invention discloses a multi-channel frequency response analysis system and a method thereof. The system comprises an actuating signal generation module [1], data acquisition modules [2], a system controller module [3], an instrument control bus [4], an actuating signal wiring unit [5] and a measuring signal wiring unit [6], wherein the actuating signal generation module [1] is an instrument module of any-waveform generator; the data acquisition modules [2] are a plurality of multi-channel parallel data acquiring instrument modules or a plurality of multi-channel digitalized instrument modules; the system controller module [3] communicates with the actuating signal generation module [1] and the data acquisition modules [2] through the instrument control bus [4] of a case backboard or a bottom board; a signal of the actuating signal generation module [1] is output by the actuating signal wiring unit [5]; and an external measuring signal accesses the data acquisition modules [2] through the measuring signal wiring unit [6]. The invention has the advantages of more measuring channels, compact structure, strong data processing capacity, high test precision and favorable expansibility and tailorability.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and relates to a multi-channel frequency response analysis system and a method thereof. Background technique [0002] In engineering tests, the measurement of frequency response characteristics is an important test. When measuring the frequency response characteristics of the system, it is necessary to apply a sinusoidal excitation signal to the input of the system under test, and at the same time collect and record the output response signal of the system under test. When the system under test is in a stable state, compare the amplitude of the output response signal with the input excitation signal. Value and phase, get the amplitude gain and phase relationship of the current frequency point, change the frequency of the excitation signal, you can get the frequency response characteristic composed of the amplitude-frequency characteristic and the phase-frequency characteristic of ...

AI Technical Summary

Problems solved by technology

Due to the limitation of the configuration of the instrument itself, only a small number of channels can be measured, such as HP3562A dynamic signal analyzer, TD1250 frequency response analyzer, etc., which are equipped with two measurement channels, and can only complete the frequency response of a single input and single output system at a time Measurement of characteristics; in addition, since the instrument itself does not have data processing functions, it is difficult to complete complex data processing tasks, such as using frequency response data to fit transfer functions and establish system mathematical models

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