A kind of acceleration frequency domain segmental servo control method and controller

Abstract

The invention discloses an acceleration frequency domain segmentation servo control method and a controller. Methods After the time domain reference acceleration is processed by the frequency domain segmentation processing method, the synthetic reference acceleration is obtained, and the reference displacement is obtained after the secondary integral calculation of the synthetic reference acceleration, and the reference displacement and the state feedback of the vibration system hardware are fed back by the displacement servo control method. The signal is calculated to obtain the control output voltage. The acceleration servo controller applying the above method uses the acceleration frequency domain subsection servo control method to process the time domain reference acceleration and state feedback signals to obtain the control output voltage. The invention improves the high-frequency component of the frequency response function H, improves the control accuracy of the acceleration power spectrum density, and reduces the reproduction process time of the acceleration power spectrum density of the electro-hydraulic random vibration system; the initial state sampling ratio in the controller is generally given to the initial state The way of setting zero reduces the time-domain response error of the acceleration servo control inner loop at startup.

Description

technical field [0001] The invention relates to an acceleration servo control method and a controller, in particular to an acceleration frequency domain segmental servo control method and a controller. Background technique [0002] The electro-hydraulic random vibration system is widely used in earthquake simulation test benches, product fatigue testing machines, vibration condition simulation test benches and other fields. The electro-hydraulic random vibration system takes the acceleration power spectral density reproduction ability or the acceleration time-domain random waveform tracking ability as an important basis for its performance evaluation. The structure of the general electro-hydraulic random vibration system is as follows: figure 1 As shown, according to the location of the vibration controller and the acceleration servo controller, the electro-hydraulic random vibration system can be divided into the acceleration servo control inner loop consisting of the acce...

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Problems solved by technology

[0007] In the journal paper "Research on Iterative Algorithm for Random Vibration Power Spectrum Reappearance", Guan Guangfeng et al. proposed an iterative algorithm with variable step size in frequency domain, and adopted different iterative step sizes for the driving spectrum correction process in different frequency bands, which improved the vibration performance. The efficiency of the power spectrum equalization of the controller, but its content still belongs to the non-real-time process of the outer loop of the vibration controller. Controlled Angle of Proceedings to Improve Acceleration Power Spectral Density Reproduction Process Efficiency

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