A method and system for adaptive time-lag compensation of real-time hybrid testing

By employing an adaptive time delay compensation method based on nominal and error models, combined with online estimation using Kalman filters, the time delay and nonlinearity issues in real-time hybrid experiments were resolved, achieving accurate tracking of the desired displacement and improved stability.

CN115981158BActive Publication Date: 2026-06-19HUAQIAO UNIVERSITY
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAQIAO UNIVERSITY
Filing Date
2023-01-30
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing adaptive time delay compensation methods require initial values ​​for parameter estimation, which affects the parameter estimation effect and convergence speed. Moreover, most of them are based on linear models, which cannot effectively solve the nonlinear problems of physical substructures in real-time hybrid experiments, resulting in insufficient accuracy and stability.

Method used

The compensator is designed using a nominal model and an error model. By identifying the error model parameters online, additional control variables are designed, and parameters are estimated using a Kalman filter. This overcomes the dependence on initial values, adapts to time-varying characteristics, and improves the accuracy and robustness of real-time mixed experiments.

Benefits of technology

It achieves accurate tracking of the desired displacement, reduces the sensitivity to parameter estimation methods and initial values, effectively solves the time-varying characteristics and nonlinearity of time delay in real-time hybrid experiments, and improves the accuracy and stability of the experiment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN115981158B_ABST
    Figure CN115981158B_ABST
Patent Text Reader

Abstract

This invention proposes an adaptive time-delay compensation method and system for real-time hybrid experiments, comprising: inputting the desired displacement d into a first time-delay compensation model to obtain a first displacement signal u1; wherein the first time-delay compensation model is the inverse model of the nominal model of the controlled object, and the controlled object is a system composed of the transmission system and physical substructures of the structure to be evaluated; inputting the first displacement signal u1 into a second time-delay compensation model to obtain a second displacement signal u2, and inputting the second displacement signal u2 into an error model to obtain an additional control quantity u. a ; and, the first displacement signal u1 and the additional control quantity u a Add them together to obtain the command displacement d. c and shift the command displacement d c Input the controlled object and obtain the measured displacement d. m The method proposed in this invention effectively improves the accuracy of real-time hybrid experiments and exhibits strong robustness. Furthermore, by designing additional control variables through online estimation of the error model, it overcomes the dependence of traditional adaptive time-delay compensation methods on parameter estimation methods and initial values.
Need to check novelty before this filing date? Find Prior Art