Long span roofs are very likely to oscillate when subjected wind load that can lead structure fatigue and endanger structures safety. Dampers have been used for long time dissipate earthquake induced energy in structures. This research work aims present experimental study of small size viscoelastic damper be installed truss roof. Small dampers large roof need tested know their performance behav...

Viscoelastic dampers are conventional passive vibration control devices with excellent energy dissipation performance. The fractional derivative has a simple form and high accuracy in the modelling of viscoelastic materials/dampers. internal variables reflect state evolution materials, often used to analyze deformation thermal process materials. In present work, mechanical properties plate-shea...

This paper presents a methodology for identifying variable-structure models of magneto-rheological dampers (MRDs) that are structurally simple, easy to estimate and well suited for model-based control. Linear-in-the-parameters NARX models are adopted, and an identification method is developed based on the minimisation of the simulation error. Both the model structure and the parameters are sele...

We consider a damped linear vibrational system whose dampers depend linearly on the viscosity parameter v. We show that the trace of the corresponding Lyapunov solution can be represented as a rational function of v whose poles are the eigenvalues of a certain skew symmetric matrix. This makes it possible to derive an asymptotic expansion of the solution in the neighborhood of zero (small dampi...

Machine tool vibration is the main reason resulting in machining quality of parts. In this paper a magnetorheological damping device for Machine tool was developed. On the basis of structural design, the damping device is researched of Machine Tool System Control Based on Magneto-rheological Dampers with Fuzzy Control algorithm. Finally a satisfied result is obtained. By analyzing the result, t...

In regions prone to seismic activity, buildings constructed on soft soil pose a significant concern due their inferior performance. This situation often results in considerable structural damage, substantial economic loss, and increased risk human life. To address this problem, study focuses the retrofitting of steel moment-resisting frames using friction metal-yielding dampers, taking into acc...

This paper presents a hardware configuration for a long reach robotic arm in which passive dampers eliminate unwanted oscillation. This paper derives and reduces the equations of motion for the proposed configuration; then develops a "realistic" design. Using a single degree of freedom approximation, the paper presents and experimentally verifies equations for the dominant natural frequency and...

Abstract. This paper presents reviews of several models and numerical simulation models of non-linear and hysteresis behaviors of magneto-rheological liquid dampers in MATLAB®/Simulink® in the example of quarter-car model of vehicle suspension simulation, such as, Bingham, Dahl, LuGre and Bouc-Wen models. In addition, it demonstrates numerical simulation models built in MATLAB®/Simulink® and di...

The paper presents experimental results on modelling and simulation of vehicle suspension. Testing the performance practice of suspension dampers is performed using a device called Spider8, which is achieved by a mathematical model to assess the behaviour and performance suspension behaviour experimentally tested through simulation environment under MATLAB/ Simulink. From the experimental data ...