基于速度反馈控制的自激振动特性研究
发布时间:2019-06-03 21:16
【摘要】:工程中自激振动常被作为不利因素而加以抑制,然而在振动能量捕获等振动利用研究中,自激振动也有振幅响应大、抗干扰能力强等优点,利用自激振动作为振动驱动将具有极大的优势。以悬臂梁为研究对象,通过模态参数与测点组合条件,导出了基于速度反馈控制下各阶模态的变化模式,得到了产生自激振动的数值判据,并对单模态进入自激振动以后的非线性极限环现象进行了讨论。通过理论建模、数值仿真和控制实验及数据处理,验证了该研究的正确性。
[Abstract]:Self-excited vibration is often suppressed as an unfavorable factor in engineering. However, in the study of vibration energy capture and other vibration utilization, self-excited vibration also has the advantages of large amplitude response and strong anti-interference ability. Using self-excited vibration as vibration drive will have great advantages. Taking the cantilever beam as the research object, through the combination of modal parameters and measuring points, the variation modes of each order mode based on velocity feedback control are derived, and the numerical criteria for generating self-excited vibration are obtained. The nonlinear limit cycle phenomenon after a single mode enters self-excited vibration is also discussed. The correctness of the study is verified by theoretical modeling, numerical simulation, control experiments and data processing.
【作者单位】: 同济大学航空航天与力学学院;
【基金】:国家自然科学基金面上项目(11272235)
【分类号】:TB53
本文编号:2492224
[Abstract]:Self-excited vibration is often suppressed as an unfavorable factor in engineering. However, in the study of vibration energy capture and other vibration utilization, self-excited vibration also has the advantages of large amplitude response and strong anti-interference ability. Using self-excited vibration as vibration drive will have great advantages. Taking the cantilever beam as the research object, through the combination of modal parameters and measuring points, the variation modes of each order mode based on velocity feedback control are derived, and the numerical criteria for generating self-excited vibration are obtained. The nonlinear limit cycle phenomenon after a single mode enters self-excited vibration is also discussed. The correctness of the study is verified by theoretical modeling, numerical simulation, control experiments and data processing.
【作者单位】: 同济大学航空航天与力学学院;
【基金】:国家自然科学基金面上项目(11272235)
【分类号】:TB53
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