The invention discloses a random wave
reproduction control method of an electro-hydraulic acceleration
servo system, which identifies the impedance characteristics of the electro-hydraulic acceleration
servo system based on a
frequency domain method, and can ensure accurate identification of
resonance peaks and
resonance valley frequency bands in the impedance characteristics of the electro-hydraulic acceleration
servo system , thereby ensuring the control accuracy of the waveform
reproduction of the resonant peak or resonant valley
frequency band. Moreover, the present invention corrects the impedance in real time according to the input and output characteristics of the electro-hydraulic acceleration servo system under the time-varying condition, and the correction calculation method can ensure the convergence of the impedance correction result, thus improving the waveform
reproduction under the time-varying condition of the electro-hydraulic acceleration servo system control precision. The invention can control the time-domain
peak value error between the acceleration output
signal and the acceleration reference
signal of the electro-hydraulic acceleration servo system within 15%. The
operating cycle of the invention is less than 1 ms, which can meet the experimental requirements of random wave reproduction of the electro-hydraulic acceleration servo system, and is easy to realize by computer
digital control.