Vibration suppression

Suppression using inerters

The Group develops passive vibration suppression devices with a recent emphasis on using inerters.

An inerter is a two-terminal element, with the property that the force applied is proportional to the relative acceleration across its terminals.  It completes the mechanical-electrical force-current analogy, providing the mechanical equivalent to a capacitor. The device is geared with the result that its apparent mass is far greater than the actual mass of the device.

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Semi-active dampers

Semi-active dampers were conceived in early 1970s as controllable devices with time-variable dissipative properties. Since then these devices were closely studied, developed and applied.

Electro-hydraulic and magneto-rheological semi-active dampers received major attention in the research group. Electro-hydraulic dampers were investigated in the context of load and vibration control in helicopter rotors in collaboration with AgustaWestland.

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Project overview

The work in this area involves developing vibration suppression devices for a range of applications including suspension systems and building dynamics. The use of inerters, which generate a force proportional to a relative acceleration within suppression devices, is being investigated. This work has, for example, led to the proposal of a tuned-inerter-damper to overcome some of the limitations of the commonly used tuned-mass-damper. In addition novel damping devices are being developed.

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