A semi-active magnetorheological fluid mechanism with variable stiffness and damping

Abstract

In this paper a semi-active fluid-mechanism is presented, which offers a variable stiffness and damping by utilizing two magnetorheological fluid valves and two springs. The study incorporates the attributes of variable damping and stiffness into one compact device. A model for the magnetical, rheological, fluidical and mechanical behaviour of the whole system is derived. An experimental setup of the proposed system and an appropriate test bench are built in order to study the variable mechanical impedance behaviour with the corresponding simulations. The results proof that the stiffness of the system can be varied among three different values, while its damping is continuously variable.

Analyse von Tilgerkonfigurationen mit trockenen Reibungselementen

“…Dämpfer, die Stöße sich zunutze machen, werden in [19,2,20,21,32] hauptsächlich in drei Varianten untersucht: mit Spiel, mit einer einzigen Stoßmasse und mit mehrfachen Stoßmassen. Magneto-elektro-rheologische Dämpfer [16,29,30,9] stellen Dämpfer mit einstellbaren Parametern dar, beispielsweise mit einer verstellbaren Steifigkeit oder Dämpfung. Dämpfer, welche auf nichtlineare viskose Zusammenhänge basieren, werden in [18,25,26] untersucht.…”

Dynamic Behaviour Adaptation of Lightweight Structures by Compressible Constrained Layer Damping with Embedded Polymeric Foams and Nonwovens

“…• special sandwich panel cores, for example, in form of truss structures combined with intermediate layers of damping materials [5] or filled with granular materials [6], including cores with voids of optimised geometries [7], • locally acting dampers such as compact acoustic black holes [8,9], structurally integrated resonant metamaterials [10] and joints with viscoelastic damping [11], • active magneto-/electro-or photorheological layers with the damping and stiffness controlled by magnetic, electric field or light, respectively [12][13][14][15][16], • extended concepts of shunted piezoelectric actuator systems [17][18][19][20], • distributed active damping systems that use numerous vibration sensors and actuators attached to complex shaped structures, driven by real-time controllers [21,22].…”

A note on a double‐serial switch‐spring‐parallel semi‐active connection element

“…Previous work [4] provided a new structure of a switched system. In this note, a detailed analysis is done for the subtype in Fig.…”