A Fast Identification Method of System Model Parameters Based on Wide Spectrum Exciting Signals

A technology of excitation signal and identification method, applied in the field of inertial testing, can solve the problems of signal energy-capacity spectrum fusion, single signal content, etc., and achieve the effect of improving frequency domain characteristics, strong controllability and rich content.

Active Publication Date: 2020-12-04
HARBIN INST OF TECH
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Problems solved by technology

However, in the process of applying the excitation signal each time, its frequency domain characteristics have not been changed, and the richness of the signal capacity cannot achieve spectrum fusion through distributed excitation, so the signal content is still relatively single

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  • A Fast Identification Method of System Model Parameters Based on Wide Spectrum Exciting Signals
  • A Fast Identification Method of System Model Parameters Based on Wide Spectrum Exciting Signals
  • A Fast Identification Method of System Model Parameters Based on Wide Spectrum Exciting Signals

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Embodiment Construction

[0068] The present invention will be described in further detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

[0069] Such as Figure 1 to Figure 11 As shown, a method for quickly identifying system model parameters based on wide-spectrum excitation signals involved in this embodiment includes the following steps:

[0070] Step 1: Excitation Signal Generation

[0071] At present, the input signals of existing test methods are mostly constant value, constant speed signal, constant speed ramp signal or single-frequency sinusoidal signal, and the spectrum content is single, which cannot meet the full coverage dynamic excitation in the working frequency band of inertial instrument test equipment. Based on this, in the design of the ex...

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Abstract

The invention provides a rapid system model parameter identification method based on a wide frequency spectrum excitation signal, and belongs to the technical field of inertial testing. Firstly, the excitation signal considering the richness of signal frequency spectrum contents is designed, and an overload generated by the excitation signal is within an allowable range by understanding a workingenvironment of inertial instrument testing equipment; and due to the fact that position information is represented by the excitation signal, a first-order derivative and a second-order derivative arecalculated to obtain speed and acceleration, a formula capable of obtaining the time of any frequency and obtaining the frequency of any time for an input signal is introduced, and according to a relation between an initial frequency and a cut-off frequency, the time of arriving at the frequency is determined, and relevant parameters are calculated. The excitation signal is novel in form and highin innovation; and the richness of the signal contents is greatly improved compared with the prior art, so that an actual working state of a system can be restored more realistically, various parameters in the system can be more comprehensively excited, and the reliability of a testing result is improved.

Description

technical field [0001] The invention relates to a method for quickly identifying system model parameters based on wide-spectrum excitation signals, and belongs to the technical field of inertial testing. Background technique [0002] The system model is a description of the essential properties of the system. The methods for establishing a system mathematical model are divided into theoretical analysis and testing. If you want to design a way to meet the performance requirements or improve the performance of the current system, you must clearly understand its dynamic characteristics. However, in actual control engineering, there are various and complex controlled objects, and it is often difficult to obtain their dynamic characteristics through theoretical analysis modeling due to their complex structure and fuzzy operating mechanism. Therefore, the combination of theoretical modeling and testing is often used in actual control engineering. Firstly, the system characteristi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/16
Inventor 孙英博王常虹夏红伟王艺蒙
Owner HARBIN INST OF TECH
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