An inerter-based active vibration isolation system

An electromagnetic inerter-based vibration suppression device

This paper describes how an inerter-based device for structural vibration suppression can be realized using an electromagnetic transducer such as a linear motor. When the motor shaft moves, a difference of voltage is generated across the transducer coil. The voltage difference is proportional to the relative velocity between its two terminals. The electromagnetic transducer will exert a force p...

An Active Microvibration Isolation System

MULTI-OBJECTIVE SEMI-ACTIVE BASE ISOLATION SYSTEM

Semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. In this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (MR) damper has been studied for co...

Decentralized control for multichannel active vibration isolation

This paper describes a theoretical and experimental investigation into an active four-mount vibration isolation system, in which electromagnetic actuators are installed in parallel with each of the four passive mounts placed between a three-dimensional piece of equipment and a vibrating base structure. Decentralized velocity feedback control is applied, where each actuator is operated independe...

Improving the H-infinity norm estimate of an active vibration isolation system using local rational models

Accurate uncertainty modeling is crucial in robust vibration controller design. A novel uncertainty modeling technique that enhances the estimated H∞ norm of the model error based on the frequency response is developed in this paper. The major innovation is the use of the local rational method (LRM), a local parametric modeling method, to address the inter-grid error. Unlike classical frequency...