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Electro-hydraulic servo earthquake simulation vibrating table

A technology of electro-hydraulic servo and vibration table, which is applied in vibration testing, measuring devices, instruments, etc., and can solve problems such as unfavorable earthquake simulation tests and inability to accurately reflect geotechnical models

Inactive Publication Date: 2017-08-04
SHANGHAI HUALONG TEST INSTR
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Problems solved by technology

Multiple iterative pre-tests are unfavorable to earthquake simulation tests. Although the magnitude is small (generally 30% of the formal test), it also pre-vibrates the geotechnical model, which may cause the geotechnical model to be shaken before the formal test. have changed so that the earthquake simulation test cannot accurately reflect the impact of the geotechnical model on the seismic wave

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  • Electro-hydraulic servo earthquake simulation vibrating table
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  • Electro-hydraulic servo earthquake simulation vibrating table

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Embodiment Construction

[0051] The invention proposes a one-step advance minimum prediction variance tracking control algorithm. One-step-ahead minimum prediction variance tracking control is a time-domain reference signal tracking control based on an adaptive strategy. The algorithm introduces the minimum variance predictor of the model of the controlled object (hydraulic vibration table and geotechnical model) to output the prediction error squared with the object The objective function of the controller is minimized to solve the one-step advance output u(k) of the controller, so that the output y(k) of the controlled object can track the reference seismic wave input r(k) of the system without static error.

[0052] In the DARMA model of the controlled system of the electro-hydraulic servo analog seismic vibration table of the present invention, the electro-hydraulic servo analog seismic vibration table is a single input and output system, and the electro-hydraulic servo vibration table and soil mod...

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Abstract

The invention provides an electro-hydraulic servo earthquake simulation vibrating table used for conducting the seismic simulation test. The earthquake simulation vibrating table comprises a processor and a control system. The processor executes a program module stored in a memory so as to realize the earthquake waveform reproduction. The reference input r(k) of seismic waves of the control system is tracked. A minimum variance estimator containing an electro-hydraulic servo vibrating table and a controlled object model of a geotechnical model are introduced. Meanwhile, a target function with an object output prediction square-error to be minimum is adopted to solve the output u(k) of the controller in the control system. therefore, the output y (k) of the seismic waves of an controlled object is realized.

Description

technical field [0001] The invention belongs to the technical field of earthquake research, in particular to a vibration table for simulating earthquakes. Background technique [0002] In earthquake simulation experiments, a digital control system is usually required to control a hydraulic servo analog seismic shaking table to achieve waveform reproduction control of reference seismic waves. At present, the control method usually used in the numerical control system is the digital iteration method (DIC) in the frequency domain [1]. This method requires system identification, and the desired control accuracy can only be achieved after multiple iterations of compensation and correction. Multiple iterative pre-tests are unfavorable to earthquake simulation tests. Although the magnitude is small (generally 30% of the formal test), it also pre-vibrates the geotechnical model, which may cause the geotechnical model to be shaken before the formal test. Changes have taken place, s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G05B13/04
CPCG01M7/022G05B13/042
Inventor 吕福生安文年刘娜娜
Owner SHANGHAI HUALONG TEST INSTR
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