Method for controlling random vibration of electrohydraulic servo system based on RLS filters

An electro-hydraulic servo system and filter technology, which is applied in the mechanical field, can solve problems that affect the quantitative evaluation of the reliability of the tested product, reduce the reproduction accuracy of the power spectral density, and cannot guarantee the convergence of the iterative algorithm.

Inactive Publication Date: 2010-04-21
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

The essence of the existing algorithm is an off-line iterative algorithm. When the parameters of the electro-hydraulic servo system or the characteristics of the specimen change during the experiment, the convergence of the iterative algorithm cannot be guaranteed, and even the iteration diverges, resulting in the power

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  • Method for controlling random vibration of electrohydraulic servo system based on RLS filters
  • Method for controlling random vibration of electrohydraulic servo system based on RLS filters
  • Method for controlling random vibration of electrohydraulic servo system based on RLS filters

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings. Such as Figure 1-5 As shown, a random vibration control method of electro-hydraulic servo system 4 based on RLS filter includes the following steps:

[0042] A. Set the acceleration power spectral density signal to be reproduced as the acceleration power spectral density reference signal 1;

[0043] B. Converting the acceleration power spectral density reference signal 1 into the acceleration time-domain drive signal 2;

[0044]C, the acceleration input signal of the electro-hydraulic servo system 4 is used as the acceleration input signal of the RLS filter I6, and the acceleration output signal of the electro-hydraulic servo system 4 is the difference between the acceleration output signal of the response signal 5 and the RLS filter I6;

[0045] D. Based on the difference between the acceleration output signal 5 of the electro-hydraulic servo system 4 and the acceler...

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Abstract

The invention discloses a method for controlling the random vibration of an electrohydraulic servo system based on RLS filters, which comprises the following steps: converting an acceleration power spectral density reference signal into an acceleration time domain driving signal; taking an acceleration input signal of the electrohydraulic servo system as that of an RLS filter I; online regulating weights of the RLS filter I and an RLS filter II in real time by using an RLS adaptive filter algorithm and performing identification on a frequency response function of the electrohydraulic servo system and an impedance function of the RLS filter I respectively; and constructing a filter III based on the identification result of the impedance function of the RLS filter II, filtering the acceleration time domain driving signal and taking an output signal of the filtration as the acceleration input signal of the electrohydraulic system. The convergence property of the RLS adaptive filter algorithm adopted by the method guarantees the convergence property of the real-time online iteration of acceleration power spectral density when the characteristics of the electrohydraulic servo system and a test piece are changed.

Description

technical field [0001] The invention relates to a vibration simulation experiment method in the mechanical field, in particular to a random vibration control method of an electro-hydraulic servo system based on an RLS filter. Background technique [0002] Vibration simulation is a kind of environmental simulation and simulation experiment, and it is widely used in defense industry fields such as aviation, aerospace, nuclear industry and civil industry sectors such as automobile and construction. The purpose of the vibration test is to assess the ability of the product to maintain its original performance under vibration excitation, that is, to study and test the structural reliability and operational reliability of the product under vibration conditions. From the perspective of experiment type, vibration simulation experiments can be divided into three types: random vibration, sinusoidal vibration and waveform reproduction. The vibration conditions of the environment are ge...

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Application Information

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IPC IPC(8): G05D19/02
Inventor 关广丰熊伟王海涛王祖温马文琦弓永军
Owner DALIAN MARITIME UNIVERSITY
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