A method for waveform reproduction control of electro-hydraulic acceleration servo system

Abstract

The invention discloses a waveform reproduction control method for an electro-hydraulic acceleration servo system. The waveform reproduction control method comprises the following steps of taking an acceleration reference signal as an input signal of linear convolution; calculating impedance of the electro-hydraulic acceleration servo system; performing inverse fourier transformation; calculating the linear convolution of two signals by an overlap-save method; taking an output signal of the linear convolution as an input signal of the electro-hydraulic acceleration servo system and the impedance calculation. All the steps in the method can be implemented through software programming, and the method is higher in instantaneity. According to the waveform reproduction control method, the impedance of the electro-hydraulic acceleration servo system is directly calculated on line by dividing G1(f) from G2(f) instead of depending on a frequency response function. The real-time on-line compensation for the acceleration reference signal is realized by the overlap-save method, so that the output signal of the electro-hydraulic acceleration servo system can reproduce the reference signal with high precision, and the control precision of a waveform reproduction vibration simulation experiment is improved.

Description

technical field [0001] The invention relates to a vibration simulation experiment method in the mechanical field, in particular to a waveform reproduction control method of an electro-hydraulic acceleration servo system. Background technique [0002] Vibration environment simulation test is a basic test method in modern engineering technology. It is widely used in defense industries such as aviation, aerospace, weapons, ships, and nuclear industries, as well as civil industries such as automobiles and construction. By reproducing the vibration environment conditions of the test piece or structure in the laboratory, to assess the ability of the test piece to maintain its original performance in the vibration environment, to study its structural reliability and operational reliability, and to test the performance of the test piece It provides an important experimental basis for technical improvement. [0003] Vibration simulation experiments can be divided into three types: r...

AI Technical Summary

Problems solved by technology

The identification result of the frequency response function has a deviation compared with the real frequency response function of the electro-hydraulic servo system, and the identification of the impedance function of the electro-hydraulic servo system based on the biased frequency response function will inevitably introduce more deviations, resulting in a decrease in the identification accuracy of the impedance function , which in turn affects the control accuracy of the waveform reproduction vibration simulation system

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