【摘要】 首先介绍了实时子结构实验技术的基本原理、过程及关键技术问题。然后建立了液压伺服实验系统的传递函数形式和状态空间形式的线性数值模型,并将滑动模态控制应用于实时子结构实验。最后对采用PID控制和滑动模态控制的实时子结构实验进行了数值仿真分析。在ElCentro地震波激励下的数值仿真结果表明:(1)滑动模态控制的控制精度和鲁棒性明显高于PID控制,(2)系统的动力特性对实验结果有较大影响,这种影响与计算时间间隔、试件的刚度、阻尼有关。更多还原

【Abstract】 The basic principle, process and key techniques of real-time substructure testing (RST) method are introduced. Linear numerical model of the servo-hydraulic system including translation function and state space form is described. The sliding mode control method and its application to RST of the hydraulic servo experiment system are presented. Finally, simulations of RST with the PID control method and the sliding mode control method are carried out. Results of the simulations with the excitation of El Centro earthquake wave show that: (1) the control accuracy and robustness of the sliding mode control method are better than that of the PID method, (2) the dynamic characteristics of the system have great influence on testing results, and the influence is related to the computation time interval, stiffness and damping of the specimen.更多还原