论文部分内容阅读
针对活载与恒载比值高的情况,提出在斜拉桥中采用随活载变化而变化的智能斜拉索方法,即根据主梁承受的荷载情况,在斜拉索中配置适当的作动系统,通过作动系统实时改变索力大小,从而实现主梁监控点处挠度或应变始终控制在目标范围内。基于分级控制算法,以应变控制为目标,采用数字信号控制系统进行了智能斜拉桥模型在移动荷载作用下的主动控制试验,研究了控制算法中电机转速设置对智能斜拉索系统控制性能的影响,以及在不同荷载移动速度下,控制算法中的死区设置和电机转速设置对智能斜拉索系统控制性能的影响。试验结果表明,通过作动器速度的分级和限位应变范围的分级,可提高系统在快速移动荷载作用下的控制能力,同时又能避免系统在慢速移动荷载作用下的频繁启动,实现了自适应控制的目标。
Aiming at the situation that the ratio of live load to dead load is high, a smart stay cable method that changes with the change of live load is proposed in the cable-stayed bridge. According to the load condition of the main beam, the appropriate action System, through the actuation system to change the size of the cable force in real time, so as to achieve the control point of the girder deflection or strain is always controlled within the target range. Based on the grading control algorithm and taking the strain control as the goal, the digital signal control system is used to carry out the active control experiment of the smart cable-stayed bridge model under the action of moving load. The control performance of the motor speed setting on the intelligent cable system is studied Influence and the influence of dead zone setting and motor speed setting in the control algorithm on the control performance of the smart stay cable system under different load moving speed. The experimental results show that the grading of the actuator speed and the grading of the limit strain range can improve the control ability of the system under the rapid moving load while avoiding the frequent starting of the system under the slow moving load. The goal of adaptive control.