A high frequency excitation device and control system

Abstract

The invention belongs to the field of hydraulic vibration and control and in particular relates to a high frequency excitation device and a control system. The high frequency excitation device and thecontrol system disclosed in the present invention can help suppress a resonance peak of the system and improve dynamic response speed. Speed feedback can be used for improving resonance frequency ofa power system, a damping ratio of the system can be increased via the acceleration feedback, and the resonance peak which affects the stability of the system can be reduced. The high frequency excitation device and the control system disclosed in the invention is large in safety factor, self-vibration frequency can be outside a work frequency bandwidth range of the system, and continuous optimization is realized according to analysis results; a valve-controlled cylinder system is integrated with an energy accumulator, a filter and a pressure sensor to enable the system to be compact and simple in structure, and the dynamic response of the system can be improved. Based on the high frequency excitation device and the control system disclosed in the present invention, a nonlinear model thattruly represents system characteristics can be conveniently built, and a hardware device basis is provided for exploring effective control strategies and parameter tuning methods.

Description

technical field [0001] The invention belongs to the field of hydraulic vibration and control, in particular to a high-frequency vibration excitation device and a control system. Background technique [0002] In the assessment of the actual working conditions of simulated products and structural strength tests, a shaking table is often required as a vibration source for calibration or vibration tests. For example, in some vibration tests, it is necessary to use a shaking table to generate a specified vibration signal, such as a seismic wave signal, to determine the response of the test object under the excitation, and then determine the parameters of the test object. The vibration table is also often used in instrument calibration. For example, when the vibration pickup is calibrated, the vibration table generates a vibration excitation signal and inputs it to the sensor of the vibration pickup. By measuring the input and output of the sensor, the parameters of the sensor are...

AI Technical Summary

Problems solved by technology

With the development of technology, many vibration tests require low-frequency vibration excitation signals, but the standard vibration table and test vibration table are usually large in size and weight, complex in structure, and not portable; the distortion of the acceleration motion signal of the vibration table will be 10%, when the frequency is lower, the acceleration signal distortion will exceed 30% or even greater

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