Servo control method and servo control device for high-frequency hydraulic shock excitation system

Abstract

The invention relates to a servo control method and a servo control device for a high-frequency hydraulic shock excitation system. The control method includes transforming a given signal of the shock excitation system into a displacement component and an acceleration component by a double-parameter generator; creating a displacement and acceleration closed loop of a servo control system, and adjusting displacement feedback PID (proportion, integration and differentiation) gains according to displacement step responses; for a high band of the shock excitation system, appropriately adjusting acceleration feedback gains according to system sinusoidal response conditions so as to improve the high frequency characteristic of the shock excitation system and the degree of acceleration waveform distortion. The control device comprises an upper computer, a lower computer, control sensors and a servo control cabinet. The control method is simple and reasonable in conception and capable of guaranteeing stable control of the hydraulic shock excitation system and improving the high frequency characteristic and the degree of acceleration waveform distortion of the hydraulic shock excitation system. The control device is simple in structure, stable to use and capable of improving the high frequency characteristic and the degree of acceleration waveform distortion of the hydraulic shock excitation system.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a servo control method and a control device of a high-frequency hydraulic vibration excitation system. Background technique [0002] The hydraulic vibrating table with hinged support and hydraulic actuator has the advantages of large thrust, large displacement, ultra-low frequency response, easy implementation, and high control accuracy. It has become the current vehicle transportation simulation, locomotive (or high-speed rail) transportation simulation. , the main means of scientific experimental devices such as airborne environment simulation and earthquake simulation. [0003] The internationally renowned MTS company provided the 6.1mX6.1m two-way seismic simulation table for the University of California, Berkeley in the 1980s, and then established various hydraulic vibration tables, all of which are based on the electro-hydraulic servo valve control cyl...

AI Technical Summary

Problems solved by technology

There are still few literatures on servo control of high-frequency hydraulic vibration excitation system, and no mature products have been developed for related control devices.

[0006] In addition, after searching the patent literature, there is no other published relevant literature on the servo control device of the high-frequency hydraulic vibration system, let alone the use of related products in applications

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