Vibration control for various structures with time-varying properties via model-free adaptive controller based on virtual controlled object and SPSA
Vibration control for various structures with time-varying properties via model-free adaptive controller based on virtual controlled object and SPSA
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DOI：
10.1016/j.ymssp.2022.108801
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发表时间：
2022
影响因子：
8.4
通讯作者：
Ansei Yonezawa;Heisei Yonezawa;I. Kajiwara
中科院分区：
文献类型：
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作者：
Ansei Yonezawa;Heisei Yonezawa;I. Kajiwara
本研究提出一种简单的主动振动控制器，其自校正机制不需要实际被控对象的数学模型。首先，一个虚拟的受控对象（VCO），它被定义为一个单自由度（SDOF）的系统，插入之间的执行器模型和实际的受控对象。将传统的基于模型的控制理论应用于由执行器和压控振荡器组成的二自由度（2DOF）系统，而不是实际被控对象的模型，从而实现无模型振动控制器。然后，一个自校正方法的基础上的同时扰动随机逼近（SPSA）的VCO为基础的无模型控制器，以获得足够的阻尼性能的各种控制对象。由于传统的基于模型的控制理论可以应用于由驱动器和压控振荡器组成的二自由度系统，因此无模型控制器的设计容易实现。此外，所提出的自校正机制提供了足够的振动抑制效果的各种控制对象，而无需手动控制器调谐。仿真研究比较了基于VCO的无模型自适应控制方案与传统方法的阻尼性能。仿真采用了五个不同的结构和特性，包括随时间变化的属性的控制对象。所提出的控制方案提供了更好的阻尼效果比传统的方法为所有的控制对象。
This study presents a simple active vibration controller with a self-tuning mechanism free from a mathematical model of an actual controlled object. First, a virtual controlled object (VCO), which is defined as a single-degree-of-freedom (SDOF) system, is inserted between an actuator model and an actual controlled object. Traditional model-based control theories are applied to a two-degree-of-freedom (2DOF) system composed of the actuator and the VCO instead of a model of the actual controlled object to realize a model-free vibration controller. Then a self-tuning method based on the simultaneous perturbation stochastic approximation (SPSA) is introduced to the VCO-based model-free controller to obtain sufficient damping performances for various controlled objects. The model-free controller design is easily achieved because the traditional model-based control theory can be applied to the 2DOF system composed of the actuator and the VCO. Moreover, the proposed self-tuning mechanism provides sufficient vibration suppression effects for various controlled objects without manual controller tunings. Simulation studies compare the damping performance of the VCO-based model-free adaptive control scheme with that of the conventional approach. The simulations employ five controlled objects with different structures and characteristics, including time-varying properties. The proposed control scheme provides better damping effects than the conventional method for all controlled objects.