基于内环H_∞控制的实时混合试验
发布时间：2019-06-06 16:04
【摘要】：实时混合试验将结构的关键部位作为试验子结构进行试验,而其余部分作为数值子结构在计算机中模拟,并通过作动器或振动台对试验子结构进行加载来实现二者边界条件的协调。由于作动器-试件系统复杂的非线性动力特性,传统的PID控制器性能受到一定影响,必须采用时滞补偿方法或外环控制消除作动器-试件系统的非线性动力特性影响,才能保证实时混合试验的成功。为在作动器内环消除作动器-试件系统非线性动力特性的影响,采用基于混合灵敏度的H_∞控制理论设计实时混合试验作动器内环控制器,并研究了这种方法的可行性。数值仿真表明,H_∞控制器表现出较好的跟踪性能并具有一定的鲁棒性;单自由度线弹性结构实时混合试验证明了该方法在作动器内环控制上的可行性。
[Abstract]:In real time mixing test, the key part of the structure is used as the test substructure, while the rest is simulated in the computer as a numerical substructure. The boundary conditions of the test substructure are coordinated by loading the actuator or shaking table. Because of the complex nonlinear dynamic characteristics of the actuator-specimen system, the performance of the traditional PID controller is affected to a certain extent. It is necessary to use the time-delay compensation method or the outer loop control to eliminate the nonlinear dynamic characteristics of the actuator-specimen system. In order to ensure the success of real-time mixing test. In order to eliminate the influence of nonlinear dynamic characteristics of actuator-specimen system in the inner loop of actuator, a real-time hybrid test actuator inner loop controller is designed by using H _ 鈭，
本文编号：2494431
[Abstract]:In real time mixing test, the key part of the structure is used as the test substructure, while the rest is simulated in the computer as a numerical substructure. The boundary conditions of the test substructure are coordinated by loading the actuator or shaking table. Because of the complex nonlinear dynamic characteristics of the actuator-specimen system, the performance of the traditional PID controller is affected to a certain extent. It is necessary to use the time-delay compensation method or the outer loop control to eliminate the nonlinear dynamic characteristics of the actuator-specimen system. In order to ensure the success of real-time mixing test. In order to eliminate the influence of nonlinear dynamic characteristics of actuator-specimen system in the inner loop of actuator, a real-time hybrid test actuator inner loop controller is designed by using H _ 鈭，
本文编号：2494431
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