Experimental study of model-free vibration control based on a virtual controlled object considering parameter uncertainty of actuator
Experimental study of model-free vibration control based on a virtual controlled object considering parameter uncertainty of actuator
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DOI：
10.1177/09544062221140814
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发表时间：
2022-12
期刊：
影响因子：
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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
实验验证了考虑执行器参数不确定性的基于虚拟被控对象(VCO)的无模型振动控制器的鲁棒性。采用了可建模为单自由度(SDOF)系统的质量型作动器。在实际被控对象和执行器模型之间引入了压控振荡器，它被定义为单自由度结构。确定了压控振荡器的参数，实现了无模型振动控制。利用由执行器模型和压控振荡器组成的两自由度结构，建立了无模型控制器的状态方程。在二自由度结构中定量地表征了执行器的参数不确定性。利用混合H2/H∞控制理论设计了无模型控制器。通过实验验证了该方法的抑振性能和对执行器不确定性的鲁棒性。为了提高实验结果的有效性，还进行了仿真研究。结果表明，所提出的减振方法具有良好的减振性能，对被控对象的执行器不确定性和特性变化具有较强的鲁棒性。
This study experimentally verifies robustness of a model-free vibration controller based on a virtual controlled object (VCO) considering parametric uncertainty of actuator. A proof-mass actuator, which can be modeled as a single-degree-of-freedom (SDOF) system, is used. A VCO, which is defined as an SDOF structure, is introduced between a real controlled object and the actuator model. The parameters of the VCO are determined so as to achieve model-free vibration control. A state equation to derive the model-free controller is constructed using the two-degree-of-freedom (2DOF) structure composed of the actuator model and the VCO. The parametric uncertainty of the actuator is quantitatively characterized in the 2DOF structure. The mixed H 2 / H ∞ control theory is used to design a model-free controller. The vibration suppression performance and robustness to the actuator uncertainty of the proposed method are validated by experiments. Simulation studies are also conducted to enhance the validity of the experimental results. As a result, the proposed damping method exhibits good damping performance and strong robustness to the actuator uncertainty and characteristic changes in controlled object.