PhD - Improving Machining Productivity Using Inerters

调谐内燃机阻尼器(TID)是一种激动人心的振动控制新方法，目前还没有在加工环境中得到应用。传感器是一种设备，它产生的力与设备上的相对加速度成正比。这与纯质量相反，在纯质量中，力与绝对加速度成正比。与传统的调谐质量阻尼器相比，基于传感器的设备(如TID)可以更轻。这与机械加工应用特别相关，因为它们可以更容易地部署在机床床、立柱、钻杆或机器人上。所有这些都受到有效载荷和空间的限制，这证明了需要紧凑和轻便的振动控制方法。同时，由于强迫振动和自激振动(如颤振)的限制，振动控制是提高加工生产率的关键技术。因此，本项目寻求开发一种适用于机械加工应用的调谐惰性阻尼器。目标是：1)评估使用磁流变液作为操作介质来调谐惰性元件的可行性，从而提出半主动惰性元件的概念。2)开发半主动惰性元件的器件尺寸和设计规则3)通过实验验证模型和设计步骤4)评估该器件用于抑制加工过程中的不良振动(例如颤振)的适宜性。

Tuned Inerter Dampers (TIDs) are an exciting new approach to vibration control, that have not yet seen application within a machining context. Inerters are devices that generate a force proportional to the relative acceleration across the device. This is in contrast to a pure mass, where the force is proportional to absolute acceleration. Inerter-based devices such as TIDs can be more lightweight when compared to classical tuned mass dampers. This is particularly relevant to machining applications, because they could be more readily deployed on machine beds, columns, boring bars, or robots. All of these suffer from having payload and space limitations, which justifies the need for compact and lightweight methods for vibration control. Meanwhile, vibration control is a key technology that enables high productivity in machining, due to the constraints imposed by forced and self-excited vibration (e.g. chatter). Consequently this project seeks to develop a tuned inerter damper that is suitable for use in machining applications. The objectives are:1) assess the feasibility of tuning inerters using magnetorheological fluids as the operating medium, thereby proposing the concept of a semi-active inerter.2) develop device sizing and design rules for semi-active inerters 3) experimentally validate the model and design procedures4) assess the suitability for using the device for suppression of undesirable vibrations during machining, such as chatter.