Parametric Analysis of Magnetorheologically Damped Pendulum Vibration Absorber

Abstract

This paper presents numerical and experimental study of an autoparametric pendulum absorber attached to a vertically moving Du±ng oscillator. The absorber can be highly e±cient for slightly damped systems, when correctly tuned. In the suspension of pendulum absorber, the magnetorheological damper (MR) is installed to allow control. The in°uence of system parameters: Viscous and magnetorheological damping, sti®ness of the spring, parameter which couples both systems on the suppression e®ectiveness are studied. Additionally, the in°uence of system parameters on periodic solutions and stability are analyzed using continuation techniques.

Cost-effective multi-objective optimal positioning of magnetorheological dampers and active actuators in large nonlinear structures

“…They can absorb the vibratory energy due to motion of the MR damper and input control voltage applied to them. Due to their mechanical simplicity, high dynamic range, low power requirements, low cost, large force capacity and inherent stability, these devices have successfully been employed as shock absorbers, suspension systems in vehicle seats, brakes in aerobic exercise equipment and, more recently, in prosthetics and seismic and wind mitigation (Bucchi et al, 2014; Kecik and Kapitaniak, 2014).…”

Energy harvesting of an autoparametric pendulum system

“…The influence of electrical damping coefficient is similar to the total mechanical damping coefficient (α 2 +β). The parameters responsible for the pendulum construction are crucial, for vibration absorption problem [4]. Influence of λ on the harvesting region is presented in Fig.…”

“…equations of motion include acceleration), then periodic vibrations generated by one parts become an excitation source for the second part. Recent developments of the absorption devices and harvesters, include an autoparametric systems, also [4][5][6][7]. In such systems, the idea lies in attaching the absorber to the primary system in such a manner, that it experiences a parametric base excitation.…”

Experimental Energy Recovery from a Backpack Using Various Harvester Concepts

“…Many electromagnetic harvesters rely on suspension systems, utilizing either a coil or a magnet supported by a spring or magnetic levitation. These systems function as a spring-mass-damper system [6,7], and consequently they have garnered significant attention [8][9][10][11]. One of the most interesting EVEHs is the magnetic levitation harvester which exhibits a nonlinear stiffness profile due to the repulsive force between magnetic poles.…”