3 This paper investigates the performance of a novel semi-active damping device at mitigating non4 simultaneous multi-hazard loads. The device, termed modified friction device (MFD), has been previously 5 proposed by the authors. It consists of a variable friction system based on automotive drum brake technol6 ogy. The device has been demonstrated in a laboratory environment, and its dynamic be...

In this paper experimental studies on vibration suppression of a cantilevered ER sandwich beam subjected to periodic disturbances are conducted. The employed controller combines a semi-active controller with an active controller and is thus termed hybrid controller. The semi-active controller is based on fuzzy-like control strategy and the active controller uses a plant disturbance canceler for...

This paper addresses a semi-active suspension control of the full vehicle equipped with 4 controlled semi-active dampers by using a full 7 degree of freedom (DOF) vertical model. First, the dissipativity conditions of the semi-active dampers are recast as saturation conditions on the control inputs. Then, the suspension controller is derived by solving a state feedback control design problem fo...

Magnetorheological (MR) dampers have received special attention as semi-active devices for mitigation of structural vibrations. Because of the inherent nonlinearity of these devices, it is difficult to obtain a reasonable mathematical inverse model. This paper is concerned with two related concepts. On one hand, it presents a new inverse model of MR dampers based on the normalized Bouc–Wen mode...

In this paper, the effect of mathematical representation method of an MR damper on the performance of control algorithm is investigated. The most exact and common Maxwel Nonlinear Slider (MNS) and modified Bouc-Wen hysteretic models are employed through a nonlinear  comparatve numerical study. In many of semi-active control algorithms, a mathematical modelling method is required for determinig ...

In semi-active suspension control, comfort and road holding are two essential but conflicting performance objectives. In a previous work, the authors proposed an LPV formulation for semi-active suspension control of a realistic nonlinear suspension model where the nonlinearities (i.e the bi-viscous and the hysteresis) were taken into account; an H∞/LPV controller to handle the comfort and road ...