基于主、被动混合模式的柔性薄板振动抑制的控制位置设计

Design for Control Position of Vibration Suppression for a Flexible Thin Plate Using Active and Passive Hybrid Mode

薄板结构被广泛应用在各种领域中,但其自身具有较高柔性,在实际工程应用中易产生较大振动.采用各类主动或被动方式的抑振装置是解决上述问题的有效手段.采用一种主被动混合抑振策略可实现对薄板结构振动的有效控制.首先建立了薄板结构的等效矩形板的动力学模型,设计了主、被动混合控制器,并利用数值仿真的方法分别对纯被动、主被动混合控制两种抑振方法进行了分析和比较.仿真结果显示,在薄板的一阶、二阶、三阶振动下,纯被动抑振方案的抑振率分别为37.195%、40.88%、11.395%,主被动混合模式抑振方案的抑振率分别为74.43%、67.68%、24.395%,主被动混合模式抑振方案有更好的抑振效果.

Thin plate structure has been widely used in various fields. The thin plate structure itself has higher flexibility,which is likely to cause greater vibration in engineering applications.The use of various active or passive modes of vibration suppression is an effective method to solve the above problems. A hybrid active and passive vibration suppression strategy is proposed to control the vibration of thin plate structures.First,the dynamic model of the equivalent rectangular plate is established,and an active and passive hybrid controller is designed.The passive and hybrid active and passive control are analyzed and compared with the method of numerical simulation.The simulation results show that the thin plate under one order and two order, three order vibration, pure passive vibration suppression scheme of the vibration suppression rate is 37. 195%, 40.88%, 11. 395%,hybrid active and passive mode vibration suppression scheme of vibration suppression rate is 74.43%, 67.68%, 24. 395% ,which shows that hybrid active and passive mode has a better suppression effect in vibration isolation.