Method for controlling real-time waveform replication of electro-fluid servo system

Abstract

The invention discloses a method for controlling the real-time waveform replication of an electro-fluid servo system, comprising the following steps; setting a reference signal; utilizing RLS adaptive filtering algorithm to implement real-time online regulation on the weight of an adaptive filter I, recognizing the frequency response functions of the electro-fluid servo system and constructing a filter IV based on the recognition result; time-delaying the reference signal; utilizing the RLS adaptive filtering algorithm to implement real-time online regulation on the weight of an adaptive filter II, recognizing the frequency response functions of the adaptive filter I and constructing a filter III based on the recognition result; utilizing the filter III to filter the reference signal and regarding an output signal thereof as a position input signal of the electro-fluid servo system. The convergence of the RLS adaptive filtering algorithm utilized by the method ensures the convergence of recognizing the frequency response functions and the impedance functions of the system when the characteristics of the electro-fluid servo system and specimens are changed, thus ensuring the convergence of reference waveform during real-time online iteration.

Description

technical field [0001] The invention relates to a vibration simulation experiment method in the mechanical field, in particular to a real-time waveform reproduction control method for an electro-hydraulic servo system. 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. Environmental vibration conditions are generally given in...

AI Technical Summary

Problems solved by technology

The essence of the existing algorithm is an offline 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 output waveform of the system being compared with the reference waveform. There is a large deviation, which greatly reduces the accuracy of waveform reproduction and affects the quantitative evaluation of the reliability of the tested product in a vibration environment

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